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TLF51801ELVXUMA1 - 10A Synchronous Buck Controller, 45V, AEC-Q100 | Infineon
The Infineon TLF51801ELVXUMA1 is a 10 A synchronous PWM step-down DC/DC controller with external n/n-MOSFET drivers, packaged in a 14-pin PG-SSOP with exposed thermal pad. It operates from 4.75 V to 45 V input, supports a 99% maximum duty cycle, and is rated for -40 C to +150 C junction temperature with AEC-Q100 automotive qualification. A PWM step-down (buck) controller is a type of switching voltage regulator that uses external MOSFETs as the power switches, a controller IC to drive those switches, and an LC output filter to deliver a lower regulated output voltage. Within the broader power-management hierarchy, the buck controller sits above integrated buck converters (which embed the switches) and below point-of-load regulators; it is chosen when load current exceeds integrated-converter capability, here up to 10 A, while still requiring controller-grade flexibility for switching frequency, current sense, and protection thresholds. Key features include a 700 kHz nominal switching frequency, adjustable current limit via R_DS(on) sensing on the high-side switch, integrated bootstrap gate drive for the high-side n-MOSFET, and a 99% duty cycle that enables low-dropout operation near the input rail. The controller uses voltage-mode control with an external compensation network and includes an enable input, power-good output, and soft-start capability. The architecture is built on a bipolar / BiCMOS process with a precision internal reference, allowing tight load and line regulation across the automotive temperature range. Synchronous rectification eliminates the need for an external Schottky diode at high-side, raising efficiency at high load currents and reducing thermal stress in compact modules. Typical applications include automotive body and chassis ECUs, LED driver front-ends, industrial 24 V sensor and actuator rails, and any point-of-load conversion above 3 A that demands automotive-grade reliability and wide input-voltage tolerance. A 45 V abs-max input allows operation directly from 12 V and 24 V automotive buses with substantial transient margin. When designing with this controller, select external MOSFETs with adequate safe-operating-area margin at worst-case VIN = 45 V and programmed peak current; the PG-SSOP-14 EP package dissipates gate-drive losses but the high-side / low-side FETs carry switching loss, so thermal design of the FETs is the dominant concern, not the IC itself. This page synthesizes distributor pricing, AEC-Q100 qualification status, drop-in same-package alternatives, and practical design notes that complement, rather than duplicate, the manufacturer datasheet.
TLF80511EJV33XUMA1 - 400mA 3.3V LDO Regulator | Infineon
The Infineon TLF80511EJV33XUMA1 is a 400 mA low-dropout (LDO) linear regulator with a fixed 3.3 V output, housed in an 8-pin PG-DSO package with an exposed thermal pad. Designed primarily for automotive applications, it accepts input voltages up to 40 V and delivers a regulated 3.3 V rail with ±2% accuracy while consuming only 38 µA of quiescent current. The integrated enable pin and reset output with adjustable delay support microcontroller power supervision. What is an LDO (low-dropout) linear regulator? An LDO is a DC linear voltage regulator that can maintain its specified output voltage even when the input voltage approaches the output voltage (small dropout). Within the semiconductor taxonomy, an LDO sits below the broader class of linear regulators, which themselves belong to the voltage-regulator family inside power-management ICs. LDOs are favored for noise-sensitive analog, RF, and microcontroller rails because they introduce no switching ripple and require only small input/output capacitors. Key features include a wide 3.0 V to 40 V input operating range (load-dump tolerant for 12 V automotive systems), 400 mA continuous output current, very low 38 µA quiescent current, and integrated protection such as overtemperature shutdown, output current limitation, reverse-polarity protection, and a windowed reset circuit. According to the Infineon datasheet, the part is AEC-Q100 qualified for automotive use, operates across the -40 °C to +150 °C junction range, and offers output voltage accuracy of ±2% across the full operating envelope. The device uses an advanced bipolar pass-element architecture that achieves a low typical dropout and high PSRR at low frequencies, keeping microcontrollers, CAN transceivers, and sensor supplies free of switching noise. The exposed thermal pad (PG-DSO-8 EP) lowers junction-to-ambient thermal resistance, enabling sustained 400 mA loads without additional heatsinking in well-designed PCBs. Typical applications include automotive body and chassis ECUs, transmission control modules, sensor supplies, CAN/LIN transceivers, and always-on microcontroller rails after a pre-regulator. Industrial use cases include PLC logic supplies, 24 V bus post-regulation, and battery-powered instrumentation. When designing with this part, ensure the input capacitor is a low-ESR ceramic placed within 5 mm of the VIN pin and that the exposed pad is soldered to a copper pour of at least 100 mm² for thermal relief. The reset delay capacitor on the D/RO pin should be chosen per the microcontroller's required power-good timing. This page synthesizes distributor pricing, AEC-Q100 cross-brand alternatives, and practical thermal design notes not found in the standalone manufacturer datasheet.
TLF80511TCATMA1 - 5V 400mA LDO Regulator | Infineon | Automotive AEC-Q100
The Infineon TLF80511TCATMA1 is a linear low-dropout voltage regulator delivering up to 400 mA at a fixed 5 V output, housed in a 3-pin PG-TO263-3-1 (DPAK) surface-mount package. It operates from input voltages up to 45 V (load-dump tolerant) and offers very low quiescent current of about 40 µA in standby, making it well suited to permanently-on automotive rails. The TLF80511TC family is qualified to AEC-Q100 Grade 1 for automotive use, covering a -40 °C to +150 °C junction temperature range. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only slightly higher than the desired output. Within the broader power management IC taxonomy, an LDO belongs to the linear regulator family, which in turn sits inside the voltage regulator category, used wherever a clean, low-noise, fixed rail is required. LDOs are particularly favored in noise-sensitive analog and microcontroller subsystems because, unlike switching regulators, they introduce no switching ripple. Key features of the TLF80511TCATMA1 include a low dropout voltage of approximately 200 mV at 200 mA load, an enable input for power sequencing, and integrated protection functions: overtemperature shutdown and output current limiting. The regulator is internally compensated, so no external compensation network is required, and it requires only small ceramic input and output capacitors for stable operation. The PG-TO263-3-1 package offers a low thermal resistance of roughly 31 °C/W at the tab, allowing it to dissipate power from the exposed tab directly into the PCB copper. Architecturally, the TLF80511TC uses a PNP pass-element topology with a precision bandgap reference and a high-gain error amplifier. Its very low quiescent current (40 µA typical) and high input voltage tolerance support its use in systems supplied directly from a 12 V automotive battery, where cranking transients and load-dump surges are common. Compared to a switching pre-regulator followed by a small LDO, the TLF80511TC can replace both stages in lighter-load rails, saving BOM cost and PCB area. Typical applications include automotive body ECUs, body control modules, instrument clusters, lighting ECUs, and HVAC controllers. It is also useful in industrial PLCs, sensor interfaces, and any 5 V microcontroller supply that is fed from a wide or noisy DC bus. When designing with this part, place input and output ceramic capacitors as close as possible to the IC and tie the tab to a sufficiently large copper pour to keep junction temperature within limits. Compared with smaller SOT-23 LDOs, the DPAK tab dramatically eases thermal management for 12 V-to-5 V conversion at 400 mA.
TLF80511TCATMA2 - 5V 400mA LDO Regulator | Infineon | Automotive
The Infineon TLF80511TCATMA2 is a low-dropout (LDO) linear voltage regulator that delivers a fixed 5V output at up to 400 mA, housed in a PG-TO263-3-1 (D2PAK, 3 leads + tab) surface-mount package. According to Infineon's OPTIREG LINEAR datasheet, the part supports a wide input voltage range and integrates current limiting, thermal shutdown, ESD protection, reverse-polarity protection, and AEC-Q100 automotive qualification in a single IC. An LDO (Low-Dropout) linear regulator is a type of linear voltage regulator that maintains a stable output voltage even when the input-to-output voltage differential approaches the regulator's dropout limit. In the power-management hierarchy, the LDO sits below switching converters (DC-DC) and is used as a post-filter to clean up switching-ripple noise on sensitive analog and digital rails. Because it operates in the linear region, an LDO introduces no switching noise but dissipates power proportional to (VIN - VOUT) x IOUT, so thermal design matters at high VIN-VOUT deltas. Key features include a fixed 5V ±2% output accuracy, very low quiescent current in normal operation, wide input voltage range up to 45V load-dump survivability, integrated current limit and thermal shutdown, reverse-battery protection on the input, and ESD protection on all pins. The PG-TO263-3-1 (D2PAK) package exposes the die-tab as a thermal pad with very low thermal resistance, enabling 400 mA continuous output at elevated ambient temperatures without external heatsinking in typical automotive conditions. The TLF80511TCATMA2 uses a PNP pass-element architecture with on-chip bandgap reference and trimmed feedback network to achieve tight output tolerance. The reverse-polarity block tolerates accidental battery reversal, while the integrated current limit fold-back protects the IC and downstream load during short-circuit events. The part is qualified to AEC-Q100 Grade 1, supporting operation across -40C to +125C junction temperatures. Typical applications include automotive body and chassis ECUs, sensor and actuator supplies, dashboard instrumentation, and 12V/24V battery-powered industrial nodes. The wide input margin and reverse-battery protection make the part particularly well suited to harsh-environment 12V automotive power nets, where load-dump transients and jump-start events are routine. When designing with this part, derate output current at high VIN - VOUT to stay within the package's thermal envelope. Place input/output ceramic capacitors close to the IC pins and follow Infineon's recommended capacitor types and ESR ranges to guarantee regulator stability across the full temperature range. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not aggregated on any single manufacturer or distributor page.
TLIN1124A-Q1 - Automotive Quad LIN Transceiver | Texas Instruments
The Texas Instruments TLIN1124A-Q1 is an automotive-grade quad Local Interconnect Network (LIN) physical layer transceiver with integrated commander pull-up resistors, inhibit, wake-up and protection features, supplied in a 24-pin VQFN (RGY) package. It supports a wide operating voltage range of 5V to 28V with extended LIN bus fault protection to ±40V, and converts TXDx protocol streams into optimized LIN bus signals via a current-limited wave-shaping driver that minimizes electromagnetic emissions (EME). A LIN transceiver is a physical-layer device that connects a microcontroller's logic-level UART/SPI pins to the single-wire LIN bus used in distributed automotive body and chassis networks. LIN transceivers sit between the protocol controller and the bus cable, handling dominant/recessive bit arbitration, slew-rate control, bus fault tolerance, and remote wake-up. Compared to CAN, LIN targets low-cost sub-buses for non-safety-critical nodes like mirror adjusters, seat modules, ambient lighting, and rain/light sensors, and is standardized by ISO 17987-4 and SAE J2602-1. Key features include compliance with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, ISO/DIS 17987-4, and SAE J2602-1; receiver capability for high-speed downloads up to 100 kbps (above the LIN spec ceiling) useful for end-of-line firmware programming; integrated commander and responder termination; thermal shutdown; bus dominant time-out; and an INH pin for managing an external voltage regulator during low-power standby. The wide 5V-28V battery range makes the part suitable for 12V automotive supply rails and 24V commercial-vehicle systems. Architecturally, each of the four LIN channels uses a slope-controlled open-drain driver and a wide-common-mode receiver, with separate TXD/RXD logic interfaces per channel. The commander pull-up (typically a diode + resistor ladder) is internal, eliminating external components on the master node. The part is qualified to AEC-Q100 Grade 1, supporting -40°C to +125°C operation, and integrates ±8 kV HBM ESD protection on the LIN bus pins. Typical applications include body control modules, HVAC control units, seat control modules, door/window liftgate modules, steering column switches, and rear-view mirror modules in 12V automotive networks. The quad channel density allows one IC to service multiple LIN sub-buses in a single ECU footprint. When designing with this device, route the LIN bus traces as short and symmetric as possible and keep them away from high-dV/dt switching nodes. Use a 100 nF ceramic bypass capacitor close to each VCC pin and a bulk capacitor on the battery rail to ride out load-dump transients. The INH pin may be used to control an external LDO for ultra-low standby current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving automotive hardware engineers a single reference for sourcing, second-sourcing, and layout guidance for the TLIN1124A-Q1.
TLIN2024A-Q1 - Quad LIN Transceiver w/ Wake-Up | TI
The Texas Instruments TLIN2024A-Q1 is a Quad Local Interconnect Network (LIN) physical-layer transceiver integrating wake-up, dominant-state timeout, and bus-fault protection in a 20-pin VQFN (RGY) package. It is AEC-Q100 Grade 1 qualified for automotive applications, compliant with LIN2.0, LIN2.1, LIN2.2, LIN2.2A and ISO/DIS 17987-4 electrical physical layer specifications, and compliant with SAE J2602-1 vehicle networks. A LIN (Local Interconnect Network) transceiver is a single-wire bidirectional bus driver/protector typically used for low-speed in-vehicle networks at data rates up to 20 kbps standard, sitting beneath higher-layer protocols such as CAN and Automotive Ethernet. Within the vehicle E/E architecture hierarchy, LIN complements CAN by serving cost-sensitive sub-networks of body electronics, sensors, and mechatronic actuators where bandwidth and deterministic latency requirements are modest but robustness against automotive transients is non-negotiable. Key features of the TLIN2024A-Q1 include two independent dual LIN transceiver blocks controlled by separate VSUP1 and VSUP2 rails, support for 12-V and 24-V applications, an extended operating voltage range with ±58-V LIN bus fault protection and load-dump tolerance, integrated wake-up pattern recognition on all four channels, and a receiver that supports data rates up to 100 kbps for faster in-line programming. The device uses internal LIN slave termination resistors selectable via the SLIN_EN pin, has an open-drain RXD output structure compatible with both 3.3-V and 5-V microcontroller I/O domains, and integrates thermal shutdown, under-voltage detection on VSUP, and dominant-state timeout to prevent a single stuck node from blocking the bus. Its wide input supply range and bus-fault tolerance make it suitable for the harsh electrical environment of 12-V and 24-V automotive platforms. Typical applications include body control modules, HVAC control panels, steering-wheel switch matrices, seat and door module LIN clusters, rear-view mirror controls, and lighting LIN nodes. The dual-rail architecture also enables systems where some LIN channels are always-on for wake-up while others are locally switched for quiescent-current reduction. Compared with discrete LIN implementations, the TLIN2024A-Q1 reduces BOM by integrating four physical-layer channels in a single small package. When designing with this device, place a 100 nF decoupling capacitor as close as possible to each VSUP pin, ensure adequate PCB trace width for 12-V battery feeds, and respect the LIN pin external diode and resistor guidance for commander nodes. The dominant-state timeout feature prevents bus lock-up but should be confirmed against system-level wake-up timing requirements during validation.
TLS115D0LDXUMA1 - 150mA Tracking LDO, 2V Adj, AEC-Q100 | Infineon
The Infineon TLS115D0LDXUMA1 is a monolithic integrated low-dropout voltage tracking regulator with high accuracy, supplied in a 10-pin TSON exposed-pad (PG-TSON-10) package. It delivers up to 150 mA of output current, supports an adjustable output voltage of 2.0 V (tracking ratio configurable via external resistor divider), and operates across a wide input range suited to 12 V automotive battery rails. The device carries AEC-Q100 qualification, making it suitable for automotive powertrain, chassis, and body electronics. Integrated protection functions include reverse-polarity protection, overtemperature shutdown, and overcurrent limiting. According to the Infineon OPTIREG linear datasheet, the regulator provides a Power Good output and an enable input for power sequencing. What is an LDO (Low-Dropout) linear regulator? An LDO is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage, with a small dropout differential between VIN and VOUT. As a linear regulator, it belongs to the broader voltage regulator family, which sits within the power management integrated circuit (PMIC) hierarchy. Tracking regulators such as the TLS115D0LD are specialized LDOs whose output voltage follows a reference voltage, scaled by external resistors. This makes them ideal for powering off-board sensors that must share a ratiometric reference with the main ECU supply. Key features include a low dropout voltage of approximately 200 mV at full load, an enable pin for power sequencing, a Power Good diagnostic output, and integrated reverse-polarity protection that allows operation in the harsh transients of automotive battery environments. The PG-TSON-10 exposed-pad package provides low thermal resistance, enabling sustained 150 mA output without external heatsinking at moderate ambient temperatures. The TLS115D0LD uses a PNP pass element architecture with a precision bandgap reference and on-chip feedback divider. The tracking topology allows the output to track a scaled version of an external reference, eliminating the need for a separate, accurate internal reference and improving supply-noise rejection for sensor applications. The exposed pad must be soldered to a sufficient copper pour to achieve rated thermal performance. Typical applications include off-board sensor power supplies in powertrain management (e.g., manifold absolute pressure and oxygen sensors), body electronics modules, and chassis control systems. The tracking regulator topology ensures the sensor supply remains ratiometric with the ECU reference, simplifying ADC measurements and diagnostics. When designing with this device, follow the datasheet layout guidance and provide adequate input/output capacitance to ensure stability under load transients. The exposed pad must be thermally and electrically connected to the ground plane to achieve the rated current and reliability. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including same-family Infineon variants and cross-brand equivalents where applicable.
TLS203B0EJV33 - 3.3V 300mA Low-Noise LDO | Infineon
The Infineon TLS203B0EJV33 is a 3.3 V fixed-output, low-dropout (LDO) linear voltage post regulator delivering up to 300 mA in an 8-pin PG-DSO package with exposed pad. It operates from a wide input range and combines low quiescent current (30 uA typical) with very low output noise, achieving 30-45 uVrms when paired with the optional 0.01 uF bypass capacitor. The device is qualified to AEC-Q100, making it suitable for automotive and industrial environments where reverse polarity and load-dump transients are routine. What is an LDO (Low-Dropout) linear regulator? An LDO is a type of voltage regulator that maintains a stable, low-noise output voltage even when the input voltage is only slightly above the desired output (small dropout). LDOs sit in the broader hierarchy: LDO -> linear regulator -> voltage regulator -> power management IC. Unlike switching regulators, LDOs do not introduce switching ripple, making them ideal as post-regulators that clean up residual noise from upstream DC-DC converters in mixed-rail systems. Key features include reverse-polarity protection on the input, short-circuit protection with current limit, thermal shutdown, and stable operation with ceramic output capacitors as small as 3.3 uF. The regulator requires no external series resistance on the output cap, simplifying BOM and PCB layout. With an operating junction temperature of -40C to +150C and AEC-Q100 qualification, the part is designed for harsh-environment automotive subsystems. Technically, the TLS203B0EJV33 uses a PNP pass-element topology with a precision bandgap reference, which gives the very low noise floor that the family is known for. Adding an external 0.01 uF NR/SS bypass capacitor further reduces output noise by attenuating the reference noise contribution, which is critical when the regulator follows a switching pre-regulator. Typical applications include automotive sensor supplies (e.g. Hall, pressure, position sensors), post-regulation after switching DC-DC converters, microcontroller and ASIC core rails, and noise-sensitive analog front ends in body and chassis ECUs. It is also widely used in industrial 24V-bus point-of-load regulation. When designing with this part, keep input trace inductance short and place the bypass capacitor close to the BYPASS pin to achieve the lowest noise. The exposed pad must be soldered to a sufficient copper pour to keep junction temperature within ratings at maximum load and minimum input-to-output differential. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the TLS203B0EJV33 that are not found on a single manufacturer or distributor product page.
TLS205B0LDV50XUMA1 - 500mA 5V LDO Regulator | Infineon
The Infineon TLS205B0LDV50XUMA1 is a micropower, low-noise, low-dropout linear voltage regulator from Infineon's OPTIREG Linear family, delivering a fixed 5.0 V output at up to 500 mA from a 10-pin PG-TSON-10-2 surface-mount package. It operates over a wide input voltage range of 5.5 V to 20 V and features a typical dropout of 350 mV at full load, making it well suited for post-regulation downstream of switching converters. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output rail. Within the broader power-management hierarchy, this device sits as a linear regulator under the voltage-regulator category of power management ICs (PMICs). LDOs are valued for their simplicity, low noise, fast transient response, and absence of switching EMI, in contrast to DC-DC switching converters which require inductors and generate ripple. Key features include a low quiescent current of 60 µA, integrated protection functions such as thermal shutdown and overcurrent limiting, and a low-noise reference that supports sensitive analog rails. The device is AEC-Q100 qualified for automotive applications, and the PG-TSON-10-2 package with exposed pad provides a thermal resistance conducive to sustained 500 mA output in compact layouts. Internally, the regulator uses a PNP pass element architecture with a precision bandgap reference and error amplifier, providing tight line and load regulation. Stability is achieved with small ceramic output capacitors, simplifying BOM and reducing PCB area. The wide 5.5 V to 20 V input range makes the part tolerant of automotive load-dump transients when fed through appropriate upstream protection. Typical applications include automotive infotainment and body-electronics modules, sensor supplies, microcontroller post-regulation, and industrial 12 V / 24 V systems requiring a quiet 5 V rail. The fixed 5 V output eliminates external feedback components and reduces design risk for production volumes. When designing with this part, ensure the input capacitor is placed close to the IC and that the exposed pad is soldered to a sufficient copper pour for thermal dissipation. Because dropout rises to 480 mV at 500 mA, verify headroom across worst-case VIN under all operating conditions, including cold-crank on automotive rails. This page synthesizes distributor pricing, drop-in alternatives in the same PG-TSON-10-2 footprint, and practical thermal/design notes not found in the manufacturer datasheet alone.
TLS4125D0EPV50XUMA1 - 2.5A 5V AEC-Q100 Buck Converter | Infineon
The Infineon TLS4125D0EPV50XUMA1 is an OPTIREG Switcher synchronous step-down (buck) DC/DC converter delivering a fixed 5V output at up to 2.5A from a wide 3.7V to 40V automotive input bus, housed in a 14-pin TSDSO (PowerTSSOP, 3.90mm width) exposed-pad package. Key specifications include a 2.8 MHz nominal switching frequency, ±1.5% PWM-mode feedback accuracy, 34 µA quiescent current, integrated power MOSFETs, and configurable 320 kHz to 560 kHz or 1.6 MHz to 2.8 MHz operating ranges. The IC supports PFM light-load mode for high efficiency at low current, synchronization input, spread spectrum modulation, and an integrated reset function with adjustable undervoltage/overvoltage thresholds. A buck converter is a switched-mode DC/DC topology that steps a higher DC input voltage down to a lower regulated DC output by alternately storing energy in an inductor and releasing it to a load through synchronous MOSFETs. The TLS4125D0EPV50XUMA1 belongs to the broader hierarchy of switching regulators -> DC/DC converters -> power management ICs -> semiconductors, and within Infineon's portfolio it sits in the OPTIREG automotive-grade family targeted at ECU point-of-load rails. Architecturally, the device integrates high-side and low-side MOSFETs, internal compensation, a soft-start circuit, and a precision feedback loop that holds 5V ±2% across line, load, and temperature variations. Spread spectrum and synchronization help meet CISPR 25 / automotive EMI limits without bulky filtering, while the dedicated reset comparator with programmable delay provides a clean microcontroller power-good signal. Typical applications include automotive body and chassis ECUs, ADAS sensor rails, infotainment head-unit supplies, instrument clusters, lighting modules, and industrial 24V-bus point-of-load regulation. The 40V absolute maximum rating tolerates load-dump transients common in 12V/24V vehicle systems, and the AEC-Q100 qualification supports deployment in safety-relevant automotive environments. When designing in this part, follow the datasheet's recommended inductor (typically 4.7 µH) and ceramic output capacitor (typically 22 µF X7R) values, keep the SW node copper area minimal to limit EMI, and connect the exposed pad to a thermal copper pour. Enable the spread-spectrum pin in noise-sensitive ADAS or audio rails to relax input-filter design.
TLS710B0EJV50XUMA1 - 5V 100mA Automotive LDO | Infineon
The Infineon TLS710B0EJV50XUMA1 is a low-dropout (LDO) linear voltage regulator from the OPTIREG™ Linear family, delivering a fixed 5.0 V output at up to 100 mA load current with ±2% output accuracy. Housed in a PG-DSO-8 package with an exposed thermal pad, the device accepts an input voltage of up to 40 V, providing substantial headroom for 12 V and 24 V automotive bus rails including load-dump transients. Dropout is specified at 200 mV typical, and quiescent current is 40 µA typical, suiting always-on ECU subsystems. An LDO (Low-Dropout) linear regulator is a class of linear voltage regulator that maintains a tightly regulated output voltage even when the input voltage approaches the output voltage. Within the power-management hierarchy, LDOs sit under linear regulators, which themselves sit under voltage regulators, which fall under power management ICs (PMICs). LDOs are distinguished from switching regulators by their lack of switching noise, making them the regulator of choice for post-switching-rail filtering and noise-sensitive analog blocks. Key features include a wide 4.0 V to 40 V operating input range, integrated output current limitation, overtemperature shutdown, and an enable input for power sequencing. The device is AEC-Q100 qualified, reflecting its target deployment in the harsh environment of automotive applications including body control modules, instrument clusters, and sensor supply rails. The exposed pad on the PG-DSO-8 package reduces thermal resistance to roughly 55 C/W on a standard 1-oz 2-layer JEDEC EIA/JESD51 footprint, enabling sustained 100 mA operation without external heatsinking at moderate VIN/VOUT deltas. Internally, the regulator uses a pass element referenced to a precision bandgap, with internal compensation that does not require an external ESR network. Stability is specified for output capacitors as low as 1 µF (X7R ceramic), simplifying BOM and reducing PCB area. Protection features include reverse-polarity robustness on the input, short-circuit current foldback, and thermal shutdown with hysteresis, all of which are critical for automotive load-dump and jump-start scenarios. Typical applications include automotive body ECUs, CAN/LIN transceiver supply, sensor power rails (e.g., Hall-effect, pressure), and industrial 24 V systems needing a clean 5 V post-switching rail. The 40 V input rating and ±2% accuracy also make the part attractive for white-goods and HVAC control boards exposed to wide input transients. When designing in this part, place input and output ceramic capacitors as close to the IC pins as possible, and tie the exposed pad to a copper pour that ties back to GND. Designers should also verify that VIN-VOUT × IOUT remains within the package's SOA, especially in 24 V systems where dropout dissipation can approach 1 W at full load. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone — supporting faster sourcing decisions.
TLS715B0EJV50XUMA1 - 5V 150mA Auto LDO Regulator | Infineon
The Infineon TLS715B0EJV50XUMA1 is a fixed 5.0 V positive-output low-dropout (LDO) linear voltage regulator that delivers up to 150 mA of load current from an input rail of up to 40 V, housed in an 8-pin PG-DSO-8 (exposed pad) package qualified to AEC-Q100 for automotive use. According to the Infineon OPTIREG linear datasheet, it regulates VQ,nom = 5.0 V with ±2% output accuracy, exhibits a typical dropout of 200 mV at full load, and features a 36 µA quiescent current and an 80 µA maximum supply current. An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. Within the broader power-management hierarchy, the LDO sits beneath the linear regulator family, which itself falls under voltage regulators and the wider power management IC category. Unlike switching regulators, an LDO dissipates VIN - VOUT as heat but adds essentially no switching noise to the output, making it ideal for post-regulation after a noisy DC-DC stage or for direct battery-powered rails. Key differentiating features include very low quiescent current for always-on subsystems, integrated protection such as overtemperature shutdown and output current limiting, an exposed thermal pad to lower junction-to-ambient thermal resistance, and an automotive qualification profile (AEC-Q100). The 200 mV dropout at 150 mA keeps the part in regulation even during cold-crank events on a 12 V automotive bus where the rail briefly collapses toward 5.2 V. The TLS715B0EJV50XUMA1 uses a PNP pass-element architecture with internal bandgap reference and feedback resistors trimmed at wafer level, eliminating the need for an external resistor divider. Built on Infineon's OPTIREG linear process, the part is engineered to survive load-dump transients up to 40 V on the input. Typical applications include automotive body and chassis ECUs, sensor and actuator supplies, instrument clusters, infotainment standby rails, and industrial 24 V bus systems. The wide 40 V input tolerance and AEC-Q100 qualification make it a common choice for ECU power trees that must ride through load-dump. When designing with this device, place input and output ceramic capacitors as close as possible to the IC pins and provide sufficient copper area on the exposed pad to keep junction temperature within the AEC-Q100 grade limits. The 5 µA typical quiescent current makes the regulator well-suited to permanent-battery applications. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering context beyond raw spec repetition.
TLS805B1LDV50XUMA1 - 50mA, 42V LDO Regulator 5V Fixed | Infineon
The Infineon TLS805B1LDV50XUMA1 is a 50 mA linear voltage regulator (LDO) with a fixed 5.0 V output, housed in a 10-pin PG-TSON-10 exposed-pad package. It operates over a wide 2.75 V to 42 V input range with a typical dropout of 100 mV at 50 mA and an ultra-low quiescent current of 5.5 µA, with an off-mode current below 1 µA. The OPTIREG linear family targets automotive and industrial applications requiring always-on supply rails with minimal standby drain. An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only slightly above the output. LDOs sit in the broader power management hierarchy: LDO → linear regulator → voltage regulator → power management IC → semiconductor. They are preferred over switching regulators in noise-sensitive analog and RF rails because they introduce no switching ripple and require only small input/output capacitors. Key features include a 5.5 µA typical quiescent current that supports permanently-powered ECUs, 100 mV typical dropout at full 50 mA load that extends headroom for cold-crank automotive transients, integrated output current limit, thermal shutdown, and an Enable pin for power sequencing. The PG-TSON-10 package with exposed pad achieves a low thermal resistance suitable for continuous 50 mA operation. Architecturally, the TLS805B1 uses a bipolar pass element with internal bandgap reference and uses the exposed thermal pad as both the die substrate connection and the primary heat dissipation path. The wide VIN tolerance and automotive-grade qualification make it robust against load-dump transients up to 42 V. The output is fixed at 5.0 V with ±2 % accuracy across the full operating temperature range. Typical applications include automotive body and chassis ECUs, industrial sensor supplies, IoT battery-powered nodes, and standby rails in microcontroller systems. The low IQ makes it especially suitable for CAN/LIN transceivers that must remain active when the main ECU is asleep. Designers should place a 1 µF X7R ceramic bypass capacitor within 5 mm of the input and output pins, and solder the exposed pad to a copper pour of at least 50 mm² to keep the junction temperature below the 150 °C shutdown threshold. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical layout notes that supplement the official Infineon datasheet for engineer-facing evaluation.
TLS805B1SJVXUMA1 - 50mA, 42V Ultra-Low IQ LDO | Infineon
The Infineon TLS805B1SJVXUMA1 is a 50 mA automotive-grade LDO linear regulator with a wide 2.75 V to 42 V input range, ultra-low 5 µA quiescent current, and an adjustable output voltage of 1.2 V to 5.0 V (also available as 3.3 V and 5.0 V fixed variants in the family), housed in an 8-pin PG-DSO surface-mount package. It belongs to Infineon's OPTIREG Linear family and targets automotive supply systems, including body electronics, sensors, and always-on battery rails where low quiescent current is critical to preserve standby battery life. The device withstands 42 V load-dump transients, features a typical 60 dB PSRR at 100 Hz, and provides integrated protection such as current limit and overtemperature shutdown, enabling robust operation in harsh automotive environments. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage, distinguished from standard linear regulators by the small headroom (dropout) they require to regulate. LDOs are a subclass of linear regulators, which sit inside the broader category of voltage regulators and the power-management IC (PMIC) family. LDO regulators are valued for their simplicity, low noise, low quiescent current, and absence of switching EMI, making them ideal for noise-sensitive analog and battery-powered applications. Key features of the TLS805B1SJV include a typical quiescent current of only 5 µA in normal operation, output current up to 50 mA, low dropout voltage suitable for cold-crank conditions, and an adjustable output version plus fixed 3.3 V and 5.0 V members of the same TLS805B1 family. The part is AEC-Q100 qualified for automotive use and operates across the -40 °C to +125 °C junction temperature range. The 8-pin PG-DSO package offers compact PCB integration with adequate thermal performance for the modest 50 mA current level. Technically, the TLS805B1SJV uses a PNP pass-element topology that enables low dropout behavior and stable regulation across the full input range. The ultra-low quiescent current is achieved through bias-current management circuits, ensuring that even in always-on battery systems the regulator contributes negligible drain. The wide input range is engineered to survive 42 V automotive load-dump events without external protection, simplifying BOM and reducing system cost. Typical applications include automotive body control modules, sensor supply rails, always-on battery-powered systems, body and chassis ECUs, and standby rails for infotainment. The wide input range and load-dump robustness also make it suitable for industrial 24 V supply systems and any application where the regulator must survive large transient input voltages. When designing with the TLS805B1SJV, ensure that the input capacitor and output capacitor meet the datasheet minimum ESR requirements and are placed as close as possible to the IC pins. For low-IQ always-on applications, account for the quiescent current contribution to total system standby power, especially in designs targeting sub-100 µA total sleep current. This page synthesizes distributor pricing, drop-in alternatives drawn from the same Infineon OPTIREG family, and practical design considerations not always collected in a single place in the manufacturer datasheet.
TLS810A1LDV33XUMA1 - 100mA, 3.3V Automotive LDO | Infineon
The Infineon TLS810A1LDV33XUMA1 is a 100 mA automotive-grade low-dropout (LDO) linear voltage regulator in a 10-pin PG-TSON (PG-TSON-10-2) package with exposed pad, delivering a fixed 3.3 V output from a wide 2.75 V to 42 V input range. It is part of Infineon's OPTIREG linear family and is qualified to AEC-Q100, making it suited for harsh automotive environments including 12 V and 24 V board-net transients. Key headline parameters include a typical quiescent current of 5 uA (some Infineon collateral quotes 10 uA IQ / 15 uA I_Q-supply - see _validation_note), a typical dropout of 250 mV at 100 mA load, integrated output current limit, and overtemperature shutdown. What is an LDO? A low-dropout linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output voltage differential is small (the "dropout"). LDOs sit in the broader hierarchy of voltage regulators within power management ICs: LDO -> linear regulator -> voltage regulator -> power management IC -> semiconductor. Unlike a switching converter, an LDO does not switch current; it dissipates (VIN - VOUT) x IOUT as heat, which trades efficiency for low noise and a small PCB footprint. Key differentiating features of the TLS810A1LDV33XUMA1 are its ultra-low 5 uA quiescent current (suitable for always-on battery nodes), 42 V wide input range (covers 24 V truck-board net and load-dump transients), and AEC-Q100 qualification with integrated protective functions (current limit, overtemperature shutdown). The PG-TSON-10-2 package with exposed thermal pad provides low thermal resistance, helping dissipate the (VIN-VOUT) x IOUT loss at higher VIN. The wide VIN also allows the same part to serve body-control modules, sensor supplies, and post-buck point-of-load rails. The TLS810A1 uses a bipolar pass-element architecture with internal bandgap reference and an error amplifier trimmed for tight line/load regulation. The combination of low IQ and a 42 V input enables direct connection to the unsuppressed vehicle bus while sustaining standby power budgets measured in single-digit microamps - critical for quiescent-current-sensitive ECUs and ISO 26262 functional-safety architectures. Typical applications include automotive body electronics, ECU standby rails, sensor and actuator power supplies, HVAC controllers, gateway modules, and any 12 V/24 V board-net point-of-load requiring 3.3 V at up to 100 mA. It is also well-suited as a post-DCDC clean-up regulator downstream of a switching pre-regulator where low ripple on a 3.3 V logic rail is required. A primary design consideration is power dissipation: at VIN=12 V, VOUT=3.3 V, IOUT=100 mA the part dissipates ~0.87 W, which the PG-TSON-10-2 EP can handle with adequate copper. Always size the input capacitor for the rated VIN ripple and place it close to the VIN pin to suppress transients. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TLS810B1LDV33XUMA1 - 100mA, 42V Ultra-Low Quiescent LDO | Infineon
The Infineon TLS810B1LDV33XUMA1 is a 3.3 V fixed-output, ultra-low quiescent-current linear voltage regulator (LDO) delivering up to 100 mA of output current from a 2.75 V to 42 V input range, housed in a 10-pin PG-TSON package with an exposed thermal pad. It is part of Infineon's OPTIREG LINEAR family and is qualified for automotive applications per AEC-Q100. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage, with the dropout being the minimum VIN - VOUT headroom needed to keep regulation. Within the broader taxonomy, the TLS810B1LDV33 belongs to the category: LDO -> linear regulator -> voltage regulator -> power management IC -> semiconductor. Its purpose is to convert a noisy, wide-range supply (such as an automotive 12 V or 24 V bus) into a clean, low-noise rail for downstream microcontrollers, sensors, and CAN/LIN transceivers. Key features include a typical quiescent current of 5.5 uA (load-independent over most operating conditions), 60 dB PSRR at 100 Hz, and an enable pin that supports power-sequenced shutdown. The regulator integrates reverse-polarity, over-voltage, over-current, overtemperature, and ESD protection, making it robust against the harsh transients present in automotive power nets. A low-ESR ceramic output capacitor is sufficient for stability. Technically, the device uses a P-channel pass architecture with an internal precision bandgap reference. The wide 42 V maximum input voltage covers load-dump events on 12 V automotive buses without requiring external TVS protection, and the 250 mV typical dropout at 100 mA allows the regulator to maintain 3.3 V even during cold-crank when VIN drops near 4 V. The exposed-pad TSON-10 package offers a low thermal resistance path to the PCB copper pour. Typical applications include automotive body and chassis ECUs, sensor supplies (e.g., for parking or pressure sensors), CAN/LIN transceivers, and always-on battery-backed microcontrollers. The wide VIN range also suits industrial 24 V bus systems and any point-of-load that must survive large input transients. When designing with this part, place input and output ceramic capacitors as close as possible to the IC pins and provide a sufficient ground copper pour tied to the exposed pad. The enable pin allows sequenced power-up in multi-rail systems, which is essential for processors that require specific rail sequencing. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TLS810B1LDV50XUMA1 - 5V 100mA Ultra-Low Iq LDO | Infineon
The Infineon Technologies TLS810B1LDV50XUMA1 is a 5 V fixed-output, 100 mA ultra-low quiescent current LDO linear regulator in a 3.3 mm × 3.3 mm leadless TSON-10 package with improved optical inspection. It accepts a wide 2.75 V to 42 V input range, delivers a regulated 5.0 V output, and consumes only 5.5 µA of quiescent current. Dropout is 200 mV (typical) at 100 mA load, supporting cold-crank and load-dump scenarios in 12 V/24 V automotive systems. An LDO (Low-Dropout) linear regulator is a member of the linear regulator family that maintains a stable output voltage when the input voltage approaches the output voltage. Within the broader taxonomy, an LDO is a sub-class of linear regulator, which itself is a sub-class of voltage regulator, which belongs to the power management integrated circuit category. Infineon's OPTIREG LINEAR family of LDO regulators targets always-on, battery-tolerant applications where quiescent current directly determines standby energy budget. The TLS810B1 is part of this OPTIREG LINEAR family, specifically optimized for automotive quiescent-sensitive loads such as body controllers, CAN transceivers and sensor nodes. Key features include a 5.5 µA typical quiescent current at light load, 100 mA continuous output current, and an enable input for power sequencing. Internal protection circuitry includes thermal shutdown, output current limiting, and reverse-polarity protection, making the device robust against typical automotive fault conditions. The wide 42 V transient input rating enables survival of load-dump pulses on 12 V automotive buses without external TVS clamps. Technically, the TLS810B1 uses a PNP pass architecture, which delivers inherently low dropout voltage and predictable line/load regulation across the entire input voltage range. The output stage is fully protected against 45 V load-dump transients, and the internal reference achieves ±2 % output voltage accuracy over the full -40°C to +150°C automotive Grade 1 junction temperature range. The TSON-10 package exposes a thermal pad that directly couples the die to PCB copper, supporting 100 mA continuous operation at elevated ambient temperatures. Typical applications include automotive body electronics (always-on ECU rails after ignition-off), CAN/LIN transceiver supply, interior lighting controllers, HVAC sensors, and industrial 24 V bus interfaces where low standby current extends battery life. The TSON-10 footprint also simplifies layout in space-constrained modules. A primary design consideration is decoupling: place a 1 µF X7R ceramic input capacitor and a 1 µF X7R output capacitor within 1 mm of the device pins to ensure regulator stability and to suppress input-voltage transients. Avoid operating continuously at VIN > 36 V at full load; the 42 V rating is for transient survival rather than steady-state operation. This page consolidates distributor pricing, verified drop-in alternatives and application notes to accelerate TLS810B1LDV50XUMA1 selection, sourcing and PCB design.
TLS810D1EJV50XUMA1 - 5V 100mA LDO | Infineon | OPTIREG
The Infineon Technologies TLS810D1EJV50XUMA1 is a 5 V fixed-output low-dropout (LDO) linear regulator delivering up to 100 mA continuous output current in an 8-pin PG-DSO-8 (exposed-pad SO-8) surface-mount package. It accepts a wide 2.75 V to 42 V input voltage range, exhibits a typical quiescent current of only 9 µA, and is qualified for automotive applications under the OPTIREG LINEAR family. The output is internally trimmed to ±2% accuracy, making it suitable as a post-regulation stage for sensors, microcontrollers, and CAN/LIN transceivers in 12 V or 24 V vehicle electrical architectures. An LDO (Low-Dropout) linear regulator is a class of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage. LDO regulators sit inside the broader hierarchy of linear regulators -> voltage regulators -> power management ICs -> semiconductor devices. Unlike switching converters, an LDO dissipates the difference between input and output as heat, so it adds no switching noise and provides exceptionally clean power rails ideal for noise-sensitive analog and RF stages. Key features of the TLS810D1EJV50XUMA1 include a wide 2.75 V to 42 V input operating range that tolerates automotive load-dump transients, ultra-low 9 µA quiescent current that preserves battery life in always-on subsystems, integrated output current limitation, overtemperature shutdown, and reverse-polarity protection on the input. The PG-DSO-8 exposed-pad package reduces thermal resistance and supports sustained 100 mA output without external heatsinking at moderate input voltages. The regulator uses a PNP pass-transistor architecture with an internal precision bandgap reference and trimmed feedback network, achieving 2% output accuracy across line, load, and temperature. The wide input range also allows direct connection to 12 V and 24 V automotive rails without pre-regulation, simplifying BOM and PCB area. Typical applications include automotive body and chassis ECUs, sensor supplies (pressure, position, temperature), CAN/LIN transceiver rails, infotainment standby rails, industrial 24 V bus sensor nodes, and battery-powered IoT edge devices requiring always-on standby regulation. The 5 V fixed output is the most common MCU and sensor rail in automotive designs. Design consideration: power dissipation equals (VIN - VOUT) × IOUT. At VIN = 12 V, VOUT = 5 V, and 100 mA load, the device dissipates roughly 0.7 W. Ensure the PCB copper area tied to the exposed pad provides adequate heat spreading to keep the junction below the 150 °C thermal shutdown threshold. This page synthesizes distributor pricing, drop-in alternatives in the same PG-DSO-8 footprint, and practical design notes not found in the manufacturer datasheet, providing engineers an information-gain reference for component selection and second-source decisions.
TLS810D1LDV33XUMA1 - 3.3V 100mA 42V LDO | Infineon OPTIREG
The Infineon TLS810D1LDV33XUMA1 is a 3.3 V fixed-output low-dropout linear regulator that delivers up to 100 mA of output current over an exceptionally wide 2.75 V to 42 V input range, all from a tiny 10-pin TSON package with an exposed thermal pad. It belongs to Infineon's OPTIREG Linear family, designed specifically for automotive and harsh-environment supply rails where every microampere of quiescent current matters. The headline numbers — 9 µA quiescent current, 42 V load-dump survivability, and a tracking region that starts at 2.75 V — make it equally suited for cranking-aware body ECUs, sensor supplies, and always-on standby rails. What is an LDO (Low-Dropout) linear regulator? It is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only a few hundred millivolts above the desired output. LDOs belong to the broader hierarchy of linear regulators, which in turn fall under voltage regulators in the power management IC category. Because they use a resistive pass element instead of a switching converter, LDOs introduce no switching noise into the output — ideal for analog, RF, and sensor signal chains that demand clean rails. Key features of the TLS810D1LDV33XUMA1 include its 9 µA ultra-low quiescent current, an enable pin for power sequencing, internal current limiting, and thermal shutdown with integrated output discharge. Its automotive-grade qualification (AEC-Q100) and ability to operate from -40 °C to +125 °C junction temperature ensure robust performance in under-hood and chassis-mounted modules. Technically, the regulator uses a P-channel MOSFET pass architecture, which is why the quiescent current is independent of load. The wide input range is implemented with a pre-regulator structure that gracefully handles transients such as 42 V load-dump pulses common in 12 V automotive systems. The output is internally set to 3.3 V with ±2 % accuracy, eliminating external feedback resistors. Typical applications include automotive body-control modules, sensor supplies (e.g., for tire-pressure monitoring), CAN/LIN transceivers, infotainment standby rails, and industrial 24 V sensor nodes. Designers value it whenever a 3.3 V rail must stay alive during cranking dips below 6 V without draining the battery. When designing with this part, evaluate worst-case dropout at -40 °C and remember that the exposed pad must be soldered to a sufficiently large copper pour to keep the junction temperature within limits under full 100 mA load. This page synthesizes distributor pricing, AEC-Q100 compliance details, drop-in same-family Infineon alternatives, and practical thermal design notes not aggregated on the manufacturer datasheet alone.
TLS810D1LDV50XUMA1 - 5V 100mA Automotive LDO | Infineon
The Infineon TLS810D1LDV50XUMA1 is a 5 V fixed-output, ultra-low quiescent current LDO linear regulator from Infineon's OPTIREG linear family, rated for 100 mA continuous output current in a 10-pin TSON (PG-TSON-10) automotive-grade package. Headline specifications include an input voltage range of 2.75 V to 42 V, a 550 mV typical dropout at 100 mA, and 9 uA typical quiescent current. The device is engineered for always-on automotive subsystems and industrial sensor rails where standby power is critical. An LDO (Low-Dropout) linear regulator is a class of linear voltage regulator that maintains a stable output even when the input voltage is only marginally higher than the output. Within the power management hierarchy, the LDO sits below switching regulators and above simple Zener/Zener-based references, providing a clean, low-noise rail at the cost of VIN-VOUT dropout power dissipation. Infineon's OPTIREG linear family specializes in low-Iq automotive regulators designed for cold-crank, stop-start, and 12 V/24 V body control applications. Key differentiating features include an integrated reset delay function with adjustable timing, an active-high enable input for power sequencing, reverse polarity protection at the input, and an output current limit combined with overtemperature shutdown. The 55 dB PSRR at 100 Hz rejection reduces ripple coupling from upstream DC-DC converters, while the 1 uA quiescent current in OFF state preserves battery life in parked vehicles. The TLS810D1LD V50 uses a PNP pass element architecture that delivers a 550 mV dropout at full 100 mA load, enabling the regulator to maintain a stable 5 V output during automotive cold-crank events when the battery voltage drops as low as 6 V. The reset circuit monitors VOUT and asserts a reset signal to a host microcontroller if the output falls below the regulation threshold. Typical applications include automotive body control modules, sensor power supplies, microcontroller power rails in BCM and gateway ECUs, and industrial 24 V bus sensor nodes. The wide 42 V input tolerance also supports 24 V truck and agricultural machinery power systems without additional protection components. When designing with this part, ensure COUT ESR stays within the stability region specified in the datasheet, and account for thermal dissipation: at 12 V to 5 V and 100 mA, the regulator dissipates 700 mW. The PG-TSON-10 exposed pad must be soldered to a copper pour of at least 50 mm squared to keep the junction temperature within the 150 C Tj limit. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single source for parametric data, supply-chain options, and cross-brand equivalents for the TLS810D1LD V50.
TLS830A4EPV50XUMA1 - 5V 300mA 40V LDO | Infineon OPTIREG
The Infineon TLS830A4EPV50XUMA1 is a 5 V fixed-output, ultra-low quiescent current LDO linear regulator from Infineon's OPTIREG linear family, delivering up to 300 mA of output current from a 3.2 V to 40 V input rail and housed in a 14-pin PG-TSDSO package with exposed thermal pad. It is qualified to AEC-Q100 for automotive applications and engineered for systems permanently connected to the battery. An LDO (Low-Dropout) linear regulator is a class of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally above the desired output. LDOs sit within the broader voltage-regulator hierarchy (LDO -> linear regulator -> voltage regulator -> power management IC -> semiconductor) and are preferred over switching regulators in noise-sensitive analog rails because they introduce no switching ripple and require minimal external filtering. Key features include a typical quiescent current of only 4.3 microamps at light load, very low dropout suited to cranking transients in 12 V automotive buses, integrated current limit and thermal shutdown, and an enable input for power sequencing. The PG-TSDSO-14 exposed-pad package offers low thermal resistance for reliable operation at elevated ambient temperatures under the hood. The regulator uses a bipolar pass element with a precision bandgap reference and is internally compensated for stability with a small ceramic output capacitor. Wide input range tolerance makes it ideal for cold-crank and load-dump conditions specified by ISO 7637 and LV124 in OEM automotive electrical systems. Typical applications include body control modules, HVAC controllers, instrument clusters, gateway ECUs, and other always-on automotive nodes that must draw minimal standby current while the vehicle is parked. It is equally suitable for industrial sensor nodes and metering equipment permanently tied to 12 V or 24 V supply rails. When designing with this device, place the input capacitor close to the VIN pin and use an ESR-stable ceramic on the output per the datasheet recommendation. Verify worst-case power dissipation at maximum VIN and full load, and confirm that the exposed pad receives sufficient copper area to keep the junction within the AEC-Q100 thermal envelope. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer product page, helping engineers shorten their BOM evaluation cycle.
TLS835B2ELVSEXUMA1 - 350mA 40V Ultra-Low Iq LDO | Infineon
The Infineon Technologies TLS835B2ELVSEXUMA1 is a 350 mA wide-input-voltage linear voltage regulator (LDO) from the OPTIREG LINEAR TLS835/TLS820 family, packaged in a 14-pin SSOP with exposed thermal pad (PG-SSOP-14-5). It accepts input voltages from 3.0 V to 40 V, supports selectable fixed output voltages of 3.3 V or 5 V, and delivers output voltage precision of <= +/-2% with a maximum output current capability of 350 mA. An LDO (Low-Dropout) linear regulator is a class of linear voltage regulator that maintains a stable, low-ripple output voltage even when the input voltage approaches the output rail. Within the broader power-management taxonomy, an LDO sits below a switching regulator but above a simple Zener reference, trading efficiency for low noise and fast transient response. The TLS835B2ELVSEXUMA1 targets always-on applications where quiescent current, not conversion efficiency, is the dominant design constraint. The device features ultra-low typical quiescent current of 20 uA, an enable pin for power sequencing, and a wide operating junction temperature range of -40C to +150C (automotive AEC-Q100 grade). The exposed-pad SSOP-14 package provides a low thermal resistance path, enabling sustained 350 mA output without external heatsinking at moderate VIN-VO drops. Output current limiting and overtemperature shutdown are integrated. Internally, the TLS835 uses a P-channel pass element topology optimized for low dropout and very low ground current, plus an internal bandgap reference trimmed for high initial accuracy. The OPTIREG family architecture shares a common silicon platform with the TLS820 (200 mA variant), enabling scalability across the 3.0 V to 40 V input range. Typical applications include automotive body and chassis ECUs, ADAS sensor power rails, industrial 24 V sensor supplies, and any always-on MCU rail that must survive load-dump transients on the 12 V/24 V automotive bus. The wide 40 V input rating makes the part tolerant of 24 V nominal industrial buses and automotive load-dump conditions. When designing with this part, derate the power dissipation budget using the SSOP-14 thermal pad. Use input and output ceramic capacitors rated for the full 40 V input transients, and observe the 350 mA current limit when sourcing into high-capacitance loads. This page synthesizes distributor pricing, same-family Infineon drop-in alternatives, and practical design notes that supplement the manufacturer datasheet.
TLS850B0TEV50ATMA1 - 5V 500mA 40V LDO Regulator | Infineon
The Infineon TLS850B0TEV50ATMA1 is a high-performance, very-low-dropout (LDO) linear voltage regulator delivering a fixed 5.0 V rail at up to 500 mA from a 3 V to 40 V input, housed in a 5-lead PG-TO252-5 (DPAK) surface-mount package with an exposed thermal tab. Designed around Infineon's OPTIREG linear technology, it combines a wide-input automotive-grade supply range with a 20 µA typical quiescent current, 100 mV typical dropout, and ±2% output accuracy for always-on supply rails. A low-dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable DC output voltage even when the input-to-output voltage headroom is small. LDOs sit in the broader hierarchy of linear regulators, which belong to voltage regulators and ultimately to the power management integrated circuit (PMIC) family. Unlike a switching DC-DC converter, an LDO dissipates VIN - VOUT as heat, trading efficiency for exceptionally low output noise and fast transient response. Key features include a 3.0 V to 40 V input voltage range suitable for direct connection to 12 V or 24 V automotive batteries (including load-dump transients), a fixed 5.0 V output with ±2% accuracy, 500 mA continuous output current, a 100 mV typical (and 250 mV worst-case) dropout at full load, and a 20 µA typical quiescent current that preserves standby energy in always-on subsystems. The IC integrates thermal shutdown, output current limiting, and a power-good output for rail monitoring, and the PG-TO252-5 tab provides a low θJA thermal path for sustained high-current operation. Internally, the TLS850B0TEV50ATMA1 uses a PNP-pass architecture with a precision bandgap reference and a closed-loop error amplifier. The 100 mV typical dropout minimizes the required input-to-output headroom, which in turn reduces on-die power dissipation and improves thermal performance at high line. The 20 µA quiescent current keeps battery drain low during key-off or sleep modes, while internal protection blocks (Overtemperature, Overcurrent) safeguard the pass element under fault conditions. Typical applications include automotive body and chassis ECUs (body control modules, instrument clusters, HVAC controllers), 24 V industrial sensor supplies, PLC and HMI power rails, LED driver biasing, and always-on standby rails in battery-connected systems. The 40 V input rating and Infineon OPTIREG robustness make it a direct match for the harsh electrical environments of vehicle powernet and industrial bus systems. When designing with this part, observe the input/output capacitor selection in the manufacturer datasheet - typically a 1 µF to 10 µF ceramic with low ESR on both rails - and verify the PG-TO252-5 copper area on the PCB keeps the junction temperature below 150 °C at worst-case VIN and full 500 mA load. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TLV431ACDBVR - 1.24V-6V Adjustable Shunt Voltage Reference | TI
The Texas Instruments TLV431ACDBVR is a low-voltage 3-terminal adjustable precision shunt voltage reference with 1% initial accuracy, programmable output from 1.24V (VREF) to 6V via two external resistors, housed in a 5-pin SOT-23 (DBV) package. The A-grade bin specifies ±1% reference tolerance and 15 mA maximum cathode current capability. The device delivers a minimum cathode current for regulation of 100 µA (typical) with low dynamic impedance across the operating range, making it suitable for low-power analog rails where a precision reference is required. A shunt voltage reference (also called a programmable zener or 3-terminal shunt regulator) is a two-terminal device whose cathode-to-anode voltage is held at a defined value when the bias current supplied by an external resistor is greater than the minimum regulation current. Unlike series LDOs, shunt references operate in parallel with the load, sinking more current as the load demands less. They sit in the same broad category hierarchy as zener diodes -> shunt regulators -> voltage references -> power management ICs -> semiconductors, and are the low-voltage successor to the classic TL431. Key features of the TLV431ACDBVR include: typical output impedance of 0.25 ohm at 1 kHz that yields low AC noise on the regulated node, specified thermal stability over the commercial 0 to 70 C range (with the wider -40 to 125 C AC-grade option available), and operation from a wide cathode voltage of 1.24V to 6V. Its bipolar process technology gives well-behaved temperature drift and long-term stability, and the small SOT-23-5 footprint enables placement near the load it serves. The TLV431 architecture is essentially a bandgap reference driving a buffered pass transistor with an open-collector (open-cathode) output. Two external resistors set VOUT = VREF × (1 + R1/R2), giving designers continuous adjustment rather than fixed 2.5V or 5V taps. Because it sinks current, it pairs naturally with a series resistor fed from a higher supply, allowing isolated sub-rails in switch-mode power supply feedback loops and ADC/DAC reference inputs. Typical applications include switching-mode power supply (SMPS) secondary-side feedback, adjustable precision voltage references for data converters, isolated flyback/forward converter error amplifiers, and low-current linear regulators. The wide VREF-to-6V range makes it ideal wherever a clean sub-6V reference is needed without resorting to a low-dropout regulator. When designing with the TLV431, choose the bias resistor so that (VSUPPLY - VREF) / Rbias supplies at least IKA(min) (100 µA typical, 1 mA worst case) at minimum load, while staying below the absolute maximum cathode current of 15 mA. A 1 µF bypass capacitor across cathode-to-anode improves transient response. This page synthesizes distributor pricing, drop-in SOT-23-5 alternatives (TI TLV431 family and ON Semi TL431 family), and practical design notes not consolidated in a single TI datasheet document.