Power Management
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Products (2,800+)
TPS77515-EP - 500mA Fast Transient LDO | Texas Instruments
The Texas Instruments TPS77515-EP is an enhanced product (EP) fast-transient-response 500-mA low-dropout voltage regulator with a fixed 1.5V output. It is designed to be stable with a 10-µF low ESR capacitor, providing high performance at a reasonable cost. The device is available in a PowerPAD HTSSOP-20 package, which offers excellent thermal performance for space-constrained applications. A low-dropout (LDO) 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. LDOs are essential in power management ICs for providing clean, low-noise supply rails to sensitive analog and digital circuits. The TPS77515-EP belongs to the TPS775xx family, which includes variants with RESET output (TPS775xx) and PG output (TPS776xx). Key features include a fast transient response, which minimizes output voltage deviation during load steps, and stability with low ESR capacitors. The device also includes a RESET output that monitors the regulated output and provides a reset signal to microprocessors and other digital systems. The TPS77515-EP is specified for the extended industrial temperature range and is part of TI's Enhanced Product line, which offers extended temperature range and improved reliability for mission-critical applications. Technically, the TPS77515-EP uses a PMOS pass element, which allows for a low dropout voltage and low quiescent current. The fast transient response is achieved through a high-bandwidth error amplifier and a carefully designed compensation network. The device is stable with a 10-µF low ESR capacitor, which simplifies the output capacitor selection and reduces the overall solution footprint. Typical applications include power supplies for DSPs, microcontrollers, and other digital ICs that require a clean, regulated 1.5V rail. The RESET output is particularly useful in systems that need a reliable power-on reset signal. The device is also suitable for battery-powered equipment, where low dropout voltage and low quiescent current are critical. When designing with the TPS77515-EP, ensure that the input voltage is at least 2.5V (the minimum input voltage for the 1.5V output) and that the output capacitor is a 10-µF low ESR ceramic capacitor. The RESET output can be used to hold a microcontroller in reset until the output voltage is stable, which is essential for reliable system startup.
TPS78433QWDRBRQ1 - 300mA 3.3V AEC-Q100 LDO | Texas Instruments
The Texas Instruments TPS78433QWDRBRQ1 is an automotive-qualified, 300-mA, low-IQ, high-PSRR low-dropout (LDO) linear regulator with a fixed 3.3 V output, housed in an 8-pin VSON (DRB) package measuring 3 x 3 mm. It accepts an input voltage range of 1.65 V to 6.0 V and features an active-high enable pin, integrated thermal shutdown, and current-limit protection. AEC-Q100 Grade 1 qualification makes it suitable for demanding automotive environments with ambient operation from -40 °C to +125 °C and junction temperatures up to +150 °C. A low-dropout (LDO) regulator is a type of linear voltage regulator that maintains a stable output voltage using a series pass element, even when the input voltage is only slightly higher than the desired output. LDOs sit within the broader hierarchy of voltage regulators under power management ICs, and they are preferred over switching regulators when low noise, small footprint, and fast transient response matter more than conversion efficiency. The TPS78433QWDRBRQ1 targets always-on automotive subsystems where low quiescent current extends standby life on the vehicle battery. Key features include a low quiescent current that preserves battery life in always-on systems, a high power-supply rejection ratio (PSRR) that attenuates upstream switching-converter ripple, and high output-voltage accuracy across line, load, and temperature. The device also integrates an active-high enable pin that supports power sequencing in multi-rail systems and a thermal-shutdown block that protects the die under fault conditions. The compact VSON-8 footprint suits module-level PCB layouts with strict area budgets. Technically, the TPS784-Q1 family uses a PMOS pass topology to achieve low dropout, and its internal reference and feedback network are trimmed for tight initial accuracy. Stability is maintained with small ceramic output capacitors, simplifying BOM cost and PCB area. The wide operating range and automotive-grade qualification allow direct use under the hood, in body controllers, and in advanced driver-assistance system (ADAS) sensor supplies. Typical applications include automotive camera modules, body and chassis controllers, ADAS sensor rails, infotainment head-unit auxiliary supplies, and always-on microcontroller rails in cluster and telematics modules. The fixed 3.3 V output suits low-power MCUs and CAN/LIN transceivers directly. When designing with this device, ensure the input-to-output headroom is sufficient to keep the LDO in regulation at maximum load, and place input/output ceramic capacitors close to the pins. For applications sharing an automotive battery feed, follow OEM load-dump and reverse-battery protection guidance around the LDO input. This page synthesizes distributor pricing, AEC-Q100 drop-in alternatives, and practical automotive design notes not bundled in the manufacturer datasheet alone.
TPS78533QWDRBRQ1 - 1A 3.3V Fixed LDO, AEC-Q100 | Texas Instruments
The Texas Instruments TPS78533QWDRBRQ1 is a 1 A ultra-low-dropout (LDO) linear regulator in an 8-pin SON (3 mm x 3 mm, DRB) package that delivers a fixed 3.3 V output from a 1.7 V to 6.0 V input rail. The device integrates an enable input, an internal soft-start, output discharge, input under-voltage lockout, over-current protection, and thermal shutdown. Quiescent current is rated at 35 uA typical, output noise is 30 uVrms (per the JLCPCB parametric listing), and PSRR is 60 dB at 1 kHz with a 315 mV typical dropout at 1 A load. The -Q1 suffix denotes full AEC-Q100 Grade-1 automotive qualification. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a constant output voltage even when the input voltage approaches the output voltage, defined by a small dropout voltage. Within the power management hierarchy, the LDO sits below switching converters and is used to post-regulate a noisy or higher-voltage rail into a clean, low-noise rail. Compared to a switching DC-DC converter, an LDO introduces no switching ripple but dissipates VIN minus VOUT as heat, making it ideal as a final stage in front of noise-sensitive analog and digital loads. Key features of the TPS78533QWDRBRQ1 include the 30 uVrms output noise, 60 dB PSRR at 1 kHz, and only 35 uA of quiescent current - a strong combination for always-on automotive battery rails where sleep current matters. The integrated soft-start limits inrush during turn-on, and the output discharge FET actively pulls the rail down when the enable pin is de-asserted, eliminating residual charge on downstream loads. The SON-8 package with exposed thermal pad provides a low theta_JB for direct dissipation into the PCB copper. The TPS785-Q1 architecture combines a precision bandgap reference with a low-impedance P-channel pass element. The wide 1.7 V to 6.0 V input range supports direct connection to a 3.3 V or 5 V system rail, while the 1 A continuous rating with 315 mV dropout at full load allows operation on rails as low as approximately 3.6 V while still delivering 3.3 V at the output. According to the TI product page, the device is qualified to AEC-Q100 Grade 1 (-40 C to +125 C ambient) and is targeted at automotive post-regulation use cases. Typical applications include automotive infotainment and cluster power rails, ADAS sensor and camera modules, body electronics and lighting controllers, always-on battery-backed MCUs, industrial sensors and PLC analog front ends, and portable battery-powered equipment. In each of these, the LDO acts as a clean post-regulator following a higher-voltage or switching pre-regulator. When designing with this part, verify that the maximum power dissipation (estimated: PD_max = (VIN_max - 3.3 V) x 1 A) stays within the thermal envelope of the SON-8 EP land pattern. A minimum 1 oz copper pour of approximately 1 cm^2 is recommended to keep junction temperature rise below 30 C at 5 V input and 1 A load. This page synthesizes distributor stock data, AEC-Q100 drop-in alternatives within the TPS785 family, and practical layout notes - content not found on the standalone TI datasheet PDF.
TPS79933DRVR - 200mA, 3.3V Fixed LDO, Low Noise | Texas Instruments
The Texas Instruments TPS79933DRVR is a 200 mA, fixed 3.3 V output, low-dropout (LDO) linear regulator with low quiescent current, ultra-low noise, and high PSRR, housed in a 6-pin WSON (DRV) 2x2 mm package. Input voltage range is 2.7 V to 6.5 V with a typical dropout of 90 mV at 200 mA load, while quiescent current is 40 uA typical. The device integrates an active-high enable pin with inrush current protection, plus internal soft-start behavior through controlled bias rise. 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 voltage. Within the broader taxonomy, an LDO is a subclass of linear regulator, which itself sits under voltage regulators and finally under power management ICs (PMICs). Unlike switching regulators, LDOs add no switching ripple but dissipate (VIN - VOUT) x IOUT as heat, so they are favored for noise-sensitive analog and RF rails. Key features include 200 mA continuous output current, 3.3 V fixed output (with -33 suffix in the family), high PSRR of 66 dB at 1 kHz and 51 dB at 10 kHz to reject upstream switching ripple, and 40 uA typical quiescent current for battery-powered designs. The WSON-6 (DRV) 2x2 mm package with exposed thermal pad provides a low theta_JA suitable for space-constrained wearables, handsets, and IoT nodes. Architecturally, the TPS79933 uses a PMOS pass element driven by a precision bandgap reference, with internal compensation that only requires 1 uF ceramic output capacitance for stability. The 2x2 mm WSON footprint is the same pad pattern used across the TPS799xx family, so different output-voltage variants (1.2 V, 1.5 V, 1.8 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V, 4.5 V) and the adjustable version can be interchanged without PCB rework. Typical applications include low-noise power for handsets and smartphones, wireless modules and IoT sensor nodes, portable battery-powered equipment (PMICs, MCUs, sensors), and post-regulation after a switching converter to clean residual ripple for ADC, DAC, RF, or audio blocks. When designing, hold input-to-output headroom below the dropout spec, place input/output ceramics within ~2 mm of the pins, and tie the exposed pad to a ground copper pour of at least 10 mm^2 for adequate heat spreading. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
TPS7A1601DGNR - 60V 100mA Ultra-Low IQ LDO | Texas Instruments
The Texas Instruments TPS7A1601DGNR is an ultra-low quiescent current, high-input voltage LDO linear regulator delivering up to 100 mA of output current in an 8-pin HVSSOP (DGN) package with exposed thermal pad. It operates from 3 V to 60 V input and provides an adjustable output from 1.2 V to 18.5 V set by an external resistor divider. An LDO (low-dropout) linear regulator is a voltage regulator that maintains a stable output even when input and output voltages are close, using a pass transistor in its linear region. LDOs are a subclass of linear regulators within the broader power management IC family, valued for low output noise and simplicity. The TPS7A1601 belongs to this category, optimized for ultra-low standby power in always-on systems. Key features include a typical quiescent current of only 5 uA, dramatically extending battery life in continuous or sporadic (power backup) applications. The device integrates a CMOS-logic-compatible enable pin and an open-drain active-high power-good (PG) output with user-programmable delay for power-rail sequencing. Dropout voltage is typically 300 mV at 100 mA load, and the part includes overcurrent and thermal shutdown protection. The CMOS architecture pairs a precision 1.2 V bandgap reference and error amplifier with a P-channel MOSFET pass element, achieving low IQ without sacrificing transient response. The device is stable with ceramic output capacitors as small as 2.2 uF, simplifying the BOM. The open-drain PG output can be pulled up to any rail up to 60 V, enabling flexible level-shifting. Typical applications include battery-powered industrial sensors, automotive body control modules, and always-on microcontroller power supplies. The 60 V rating allows direct connection to 12 V and 24 V industrial buses with full tolerance for load-dump transients, eliminating a pre-regulator stage. Design consideration: at high input-to-output differentials, dissipation is significant (e.g., 24 V to 3.3 V at 100 mA is about 2.1 W), so PCB copper area under the exposed pad must be sized for thermal performance, and the programmable PG delay should be set to match MCU reset requirements.
TPS7A1601QDGNRQ1 - 60V 100mA LDO 5uA IQ AEC-Q100 | Texas Instruments
The Texas Instruments TPS7A1601QDGNRQ1 is an automotive-qualified, 60V, 100mA low-dropout (LDO) linear voltage regulator with adjustable output (1.2V to 18.5V), ultralow 5uA quiescent current, enable pin, and power-good output, packaged in an 8-pin HVSSOP (MSOP-PowerPAD, DGN) with exposed pad. An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a stable output voltage even when the input-output differential is small. Within the power management IC hierarchy, LDOs provide ripple-free regulation downstream of switching converters or directly from harsh input rails. The TPS7A16-Q1 family targets wide-VIN battery and automotive systems where high input tolerance and ultra-low standby current are critical. Key features include a 4.5V to 60V input range with integrated undervoltage lockout (UVLO), 5uA quiescent current for always-on battery applications, CMOS-logic-compatible enable pin, and an integrated open-drain, active-high power-good (PG) output with user-programmable delay for rail sequencing. The device is AEC-Q100 qualified for -40C to +125C operation. Architecturally, the TPS7A16-Q1 uses a precision reference and error amplifier with internal protection including current limiting and thermal shutdown. The PowerPAD HVSSOP-8 package provides low thermal resistance, allowing reliable 100mA operation from high input voltages when the exposed pad is soldered to an adequate copper plane. Adjustable output is set with two external resistors using the standard feedback divider equation. Typical applications include automotive battery-connected rails (12V/24V/48V systems), always-on microcontroller standby supplies, battery-powered industrial sensors, and power-rail sequencing in MCU-based systems where the PG output enables controlled startup. The 60V rating provides surge margin on automotive load-dump-exposed nodes. Design consideration: at 60V input and low output voltage, power dissipation limits output current; calculate Pd = (VIN - VOUT) x IOUT and ensure the thermal design keeps junction temperature below 125C. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Prices shown are as of 2026-09-01.
TPS7A1633DGNT - 60V 100mA LDO w/ Enable & PG | Texas Instruments
The Texas Instruments TPS7A1633DGNT is a 100 mA, 60 V, ultra-low-IQ, low-dropout (LDO) linear voltage regulator with active-high enable and open-drain power-good output, offered in a fixed 3.3 V output version. It comes in an 8-pin HVSSOP (DGN) package with PowerPAD exposed thermal pad. The device combines 3 V to 60 V wide-VIN tolerance with only 5 µA typical quiescent current and 1 µA shutdown current, enabling always-on power rails in battery-backed systems. 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. LDOs belong to the linear regulator family, which is a sub-category of voltage regulators within power management ICs. Unlike switching regulators, LDOs have no switching noise, making them ideal for noise-sensitive analog and RF rails, but they dissipate (VIN − VOUT) × IOUT as heat. The TPS7A16 family extends the LDO hypernym into the wide-input, ultra-low-IQ segment where switching regulators become impractical. Key features include 60 mV typical dropout at 20 mA, 2% output accuracy, and an integrated open-drain active-high power-good (PG) output with user-programmable delay. The CMOS-compatible enable pin supports sub-µA shutdown, while the PowerPAD EP reduces θJA to enable continuous 100 mA output without external heatsinking at moderate VIN. The device is targeted at always-on microcontroller supply rails in industrial sensors, e-meters, and automotive body modules. The TPS7A16 uses a PNP-pass architecture with a precision bandgap reference and internal charge-pump drive. Its 60 V rating supports 24 V and 48 V industrial buses plus automotive load-dump transients (with external TVS). The 5 µA IQ makes it ideal for battery-powered applications where standby time dominates, and the PG output allows MCU-driven sequencing without extra supervisory ICs. Typical applications include 24 V industrial sensor rails, smart-metering data-logger supplies, battery management housekeeping rails, and automotive body-controller always-on logic. The wide VIN also suits fire/security panels and HVAC controllers. In every case the regulator sits between a noisy or high-voltage bus and a low-power MCU/analog domain. When designing with the TPS7A1633DGNT, observe the minimum VIN-VOUT headroom for regulation at 100 mA and place the input/output ceramic capacitors close to the IC pins. Tie PG to a logic-level pull-up, and use the EN pin for sequenced power-up. The exposed pad must be soldered to a sufficient copper area for thermal performance.
TPS7A1901DRBT - 450mA 40V LDO Regulator | Texas Instruments
The Texas Instruments TPS7A1901DRBT is a 450-mA, 40-V wide-VIN, low-IQ, adjustable low-dropout (LDO) linear regulator with power-good indicator and enable, supplied in an 8-pin SON (DRB, 3x3 mm) package. Its headline specifications are: 450 mA output current, 40 V maximum continuous input voltage, and an adjustable output voltage range of approximately 1.5 V to 18 V, plus a wide operating junction temperature of -40 °C to +125 °C. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when its input voltage is only slightly above the desired output (low dropout). Within the broader taxonomy of power management ICs, an LDO belongs to the linear-regulator family, which is itself a subset of voltage regulators alongside DC-DC converters, charge pumps, and supervisors. LDOs are valued for their simplicity, very low output noise, fast transient response, and lack of switching ripple, making them ideal as post-regulators after a switching converter or as the primary supply in low-power segments. Key feature highlights of the TPS7A1901 include its ultra-wide 40 V VIN tolerance for industrial 24 V bus and automotive load-dump transients, a low quiescent current for always-on bias rails, an integrated open-drain power-good (PG) output for system rail sequencing and fault monitoring, and an active-high enable (EN) input for shutdown. The TPS7A1901 family also includes fixed-voltage versions for common rails, while the '01' suffix denotes the adjustable variant. Technically, the TPS7A1901 uses a PNP-pass architecture (per TI LDO convention) optimized for low-Iq and high-VIN capability, with internal soft-start, current-limit, and thermal-shutdown protection. The adjustable '01' output is set by an external resistor divider on the ADJ/SENSE pin, and the PG output flags when VOUT has risen into regulation - useful for MCU reset circuits or downstream converter enables. Typical applications include industrial sensor and PLC 24 V rails, building automation and HVAC controls, e-metering and smart-grid monitoring, low-noise post-regulation after a switching supply, and always-on microcontroller bias in white goods. The 40 V VIN rating also suits 12 V/24 V automotive and battery-fed systems. Design trade-off to note: as a linear regulator, power dissipation equals (VIN - VOUT) x IOUT; at 40 V input and 450 mA load, a 5 V output dissipates roughly 15.75 W and absolutely requires either a smaller VIN-VOUT delta or significant PCB copper / thermal mitigation. This page synthesizes live distributor pricing, verified drop-in alternatives, and design notes derived from TI's TPS7A19 family datasheet - information gain not found on any single distributor product page.
TPS7A2450DBVR - 200mA, 18V Ultra-Low IQ LDO, 5.0V Fixed | Texas Instruments
The Texas Instruments TPS7A2450DBVR is a 200-mA, 18-V, ultra-low-IQ, low-dropout (LDO) linear voltage regulator with fixed 5.0 V output, housed in a 5-pin SOT-23 (DBV) package. It supports a wide 2.4 V to 18 V input range, draws only 2 µA typical quiescent current, and delivers 200 mA continuous output current with a 250 mV dropout at full load. Output noise is 300 µVrms and PSRR is 70 dB at 100 Hz. 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, eliminating the need for the large headroom required by older NPN-pass regulators. LDOs sit in the broader hierarchy of linear regulators, which themselves are a subset of voltage regulators within the power management IC category of semiconductor devices. Compared to switching converters, LDOs add no switching ripple but dissipate more heat at high VIN-VOUT differentials, making ultra-low-IQ variants like the TPS7A2450DBVR essential for always-on battery-powered systems. Key differentiating specifications include the 2 µA typical quiescent current - roughly 10x lower than typical 20 µA LDOs - which directly extends battery standby life in IoT nodes. The 70 dB PSRR at 100 Hz effectively filters ripple from upstream switching pre-regulators on a shared rail. Integrated enable (EN) pin supports < 1 µA shutdown current for power gating. Built-in protection features include thermal shutdown and current limit, plus the SOT-23-5 footprint enables compact PCB placement in space-constrained modules. Architecturally, the TPS7A2450DBVR uses a CMOS pass element with a precision bandgap reference, achieving the low-IQ target without sacrificing transient response. The 250 mV dropout at 200 mA ensures the regulator stays in regulation down to roughly 5.25 V on VIN when sourcing 200 mA into a 5.0 V load, simplifying system design when paired with a 1S Li-ion or USB supply. Typical applications include battery-powered IoT sensors, always-on microcontroller rails, industrial 12 V to 5 V post-regulation after a switching pre-regulator, and portable medical or wearable electronics. Designers select this part when standby power budget is the critical constraint rather than peak load current. A key design trade-off is thermal dissipation at high VIN - at VIN=18V, VOUT=5V, IOUT=200mA, dissipation is 2.6 W, which exceeds the SOT-23-5's continuous rating without copper pour mitigation. Plan copper area or limit VIN accordingly. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate TPS7A2450DBVR selection.
TPS7A2633DRVR - 500mA 3.3V Ultra-Low-IQ LDO | Texas Instruments
The Texas Instruments TPS7A2633DRVR is a 500 mA, 3.3 V fixed-output, ultra-low-IQ (2.0 µA typical) low-dropout (LDO) linear regulator with an integrated open-drain power-good indicator, packaged in a 6-pin WSON (DRV) 2x2 mm package. It accepts input voltages from 2.4 V to 18 V and delivers a factory-trimmed 3.3 V output at 1% accuracy over temperature, with a maximum dropout of 590 mV at 500 mA load. The combination of wide VIN range, low quiescent current, and small footprint makes this regulator well suited to always-on subsystems in battery-powered and industrial applications. What is an LDO? An LDO (Low-Dropout) linear regulator is a DC linear voltage regulator that can maintain a regulated output voltage even when the input voltage approaches the output voltage (i.e., with very low VIN-VOUT headroom or "dropout"). In the power management IC hierarchy, LDOs sit beneath switching converters as a clean, low-noise post-regulation or auxiliary-rail building block. Unlike buck or boost switching converters, an LDO dissipates excess energy as heat and adds no switching ripple, which is why ultra-low-IQ LDOs such as the TPS7A26 family are preferred for biasing MCUs, sensors, and always-on rails where both noise and standby battery drain matter. The TPS7A26 platform integrates key differentiating features: 2.0 µA typical IQ for extended battery life, ±1% output accuracy across -40°C to +125°C, an open-drain PGOOD output for rails-ready sequencing and supervision, internal current limit, and thermal shutdown. Adjustable output versions (1.24 V to 17.4 V) are also available in the same DRV package, allowing PCB reuse across different rails in a platform. Architecturally, the TPS7A26 uses a PNP pass element topology with a precision bandgap reference and trimmed feedback network. The wide 18 V input range allows direct regulation from 12 V industrial buses, USB (5 V), or 2-cell lithium packs, while the 2.0 µA IQ keeps standby losses under 10 µW at 3.3 V, which is critical for IoT nodes that must run for years on a primary cell. Typical applications include low-power MCU rails (MSP430, STM32 in stop mode), wireless sensor nodes (Zigbee, BLE, LoRa), industrial 12 V to 3.3 V point-of-load regulation, e-metering and home-automation subsystems, battery-backed RTC and memory retention rails, and as a post-filter following a noisy DC/DC pre-regulator. When designing with this LDO, derate VIN - VOUT carefully: at 18 V input and 3.3 V output at full 500 mA load, the device dissipates roughly 7.35 W and requires a substantial copper pour to keep the junction within the 125°C limit. Decouple both input and output with at least 1 µF X7R/X5R ceramic close to the pins, and leave PGOOD floating or pulled up if monitoring is not required. This page synthesizes authorized distributor pricing, parametric drop-in alternatives from the same TPS7A26 family, and practical PCB/thermal design notes that go beyond the manufacturer datasheet's typical-application curves.
TPS7A3301 - 1A, -36V Ultra-Low Noise Negative LDO | Texas Instruments
The Texas Instruments TPS7A3301 is a negative-voltage, ultra-low-noise, high-PSRR linear regulator capable of delivering up to 1A of output current. It is designed for applications requiring a clean negative supply rail, such as audio, RF, and precision analog systems. The device operates from an input voltage range of -3V to -36V and provides an adjustable output voltage from -1.18V to -33V, set by external resistors. It is available in a 20-pin VQFN (RGW) package with an exposed thermal pad, enabling efficient heat dissipation in compact designs. Key features include an output noise of 12.7 uVrms (20 Hz to 100 kHz), a power supply rejection ratio (PSRR) of 75 dB at 1 kHz, and a low dropout voltage of 300 mV at full 1A load. The device also offers an active-low enable pin for power sequencing, a programmable soft-start function to limit inrush current, and thermal shutdown protection. The VQFN-20 package provides a thermal resistance of 31.4 C/W, allowing moderate power dissipation without external heatsinking. The TPS7A3301 employs a precision bandgap reference and a low-noise architecture, achieving noise performance comparable to discrete reference designs while maintaining regulator simplicity. The high PSRR minimizes ripple from upstream switching converters, making it ideal for noise-sensitive analog and RF signal chains where clean negative power rails are critical. Typical applications include audio DAC and op-amp negative supplies, RF transceiver bias circuits, precision ADC/DAC reference buffering, and test and measurement instrumentation. The wide input range also supports industrial -24V bus systems with adequate headroom. When designing with this device, ensure adequate input-to-output voltage headroom to maintain regulation under all load conditions. The enable pin allows sequential power-up in multi-rail systems, which is essential for processors requiring specific rail sequencing. Proper PCB layout with adequate copper pour is recommended for thermal management.
TPS7A4700RGWR - 36V 1A Ultralow-Noise LDO | Texas Instruments
The Texas Instruments TPS7A4700RGWR is a positive, ultralow-noise low-dropout (LDO) linear regulator sourcing up to 1A from a 3V to 36V input, housed in a 5x5 mm 20-pin VQFN (RGW) package with exposed thermal pad. An LDO is a type of linear voltage regulator that maintains a stable output even when the input-to-output differential is small. In the power-management IC hierarchy, an LDO typically follows a switching converter or battery to generate a clean analog rail for noise-sensitive loads such as op-amps, ADCs, and PLL/VCO blocks. Key features include 4.17 uVRMS output noise, high power supply rejection ratio (PSRR), and the unique ANY-OUT technique: the output voltage is user-programmable up to 20.5V via PCB layout connections without external feedback resistors or feed-forward capacitors, reducing component count and eliminating resistor thermal noise. Note this variant has no enable pin (choose TPS7A4701 for enable). Technically, the bipolar architecture with precision bandgap reference delivers high PSRR, suppressing switching-converter ripple and making the device an ideal post-regulator after a DC-DC stage. The absent external divider shortens the sense path, lowering the noise floor further. Typical applications include precision test and measurement instrumentation, RF transceiver PLL/VCO rails, audio DAC supplies, industrial 24V-bus sensor conditioning (36V rating provides headroom), and medical diagnostics. Design consideration: verify the PCB routing pattern that sets the output voltage, since this variant has no external adjust pin; use adequate copper pour under the exposed pad for thermal relief. As of 2026-08-29, the part is stocked at DigiKey and Mouser.
TPS7A4701QRGWRQ1 - 1A 35V Ultra-Low Noise LDO | TI Automotive
The Texas Instruments TPS7A4701QRGWRQ1 is an AEC-Q100 qualified, ultra-low-noise, high-PSRR LDO linear regulator delivering up to 1A output current in a 20-pin VQFN (5x5 mm) package with exposed pad. It accepts input voltages up to 35V and provides an adjustable output from 1.4V to 34V via external feedback resistors, or up to 20.5V with a user-programmable PCB layout. An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a stable output voltage even when the input is only slightly higher than the output. Within the power management IC hierarchy, the TPS7A47-Q1 sits at the precision post-regulation stage, typically cleaning up noisy switching-converter rails for sensitive analog loads. Key features include 4.2 uVRMS output noise (20 Hz to 100 kHz), very high PSRR that suppresses upstream DC-DC ripple, an enable pin for power sequencing, thermal shutdown, and bipolar process technology optimized for RF and analog performance. According to TI datasheet for TPS7A47-Q1, the device is designed primarily for noise-critical RF signal chains. Typical applications include automotive ADAS sensor power supplies, RF PLL/VCO rails, high-end audio DAC supplies, and precision data-converter reference rails. The 35V input tolerance supports automotive 12V and industrial 24V buses with load-dump headroom. Design consideration: at large VIN-VOUT deltas and 1A load, power dissipation is significant - ensure adequate PCB copper area on the exposed pad. Prices as of 2026-08-29.
TPS7A4701RGWR - 1A, 35V Ultra-Low Noise LDO | Texas Instruments
The Texas Instruments TPS7A4701RGWR is an ultra-low-noise, high-PSRR LDO linear regulator delivering up to 1A output current in a 20-pin VQFN (RGW) package with exposed thermal pad. It features an adjustable output voltage range of 1.4V to 34V and supports input voltages from 3V to 35V. Key features include 4.17 uVrms output noise (20 Hz to 100 kHz), 72 dB PSRR at 1 kHz, and a low dropout voltage of 200 mV at full 1A load. The device also offers 6.4 mA quiescent current, an active-high enable pin for power sequencing, and thermal shutdown protection. The VQFN-20 package provides a thermal resistance of 31.4 C/W, enabling compact designs without external heatsinking at moderate power levels. The TPS7A4701 utilizes a bipolar architecture with a precision bandgap reference, achieving noise performance comparable to discrete reference designs while maintaining regulator simplicity. The high PSRR minimizes ripple from upstream switching converters, making it suitable for noise-sensitive analog and RF signal chains where clean power rails are critical. Typical applications include high-end audio DAC power supplies, PLL/VCO power rails in RF transceivers, precision ADC/DAC reference buffering, and test and measurement instrumentation. The wide input range also supports industrial 24V bus systems with adequate headroom. When designing with this device, ensure adequate input-to-output voltage headroom to maintain regulation under all load conditions. The enable pin allows sequential power-up in multi-rail systems, which is essential for processors requiring specific rail sequencing.
TPS7A4701RGWR - 1A, 36V Ultra-Low Noise LDO | Texas Instruments
The Texas Instruments TPS7A4701RGWR is a 1 A ultra-low-noise LDO linear regulator with 4.17 uVRMS output noise, a 3 V to 36 V input range, and an adjustable output from 1.4 V to 34 V, housed in a 20-pin VQFN (RGW) 5x5 mm package with exposed thermal pad. 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 marginally higher than the output. Within the power management IC hierarchy, LDOs sit downstream of switching converters, providing the final, noise-free regulation stage that sensitive analog loads require. Unlike DC-DC converters, LDOs add no switching ripple, which is why they dominate RF, audio, and precision instrumentation power rails. Key features include 4.17 uVRMS output noise over the 20 Hz to 100 kHz bandwidth, 1 A output capability, and a low dropout voltage of approximately 307 mV, per the TI TPS7A47 datasheet. The TPS7A4701 variant offers an externally adjustable output via a feedback pin, while the sibling TPS7A4700 uses a PCB-programmable scheme requiring no external resistors. An enable pin supports power sequencing in multi-rail systems. The device is built on bipolar technology, chosen specifically for high-accuracy, high-precision instrumentation where clean rails maximize system performance. According to TI, the TPS7A47 family is optimized for powering operational amplifiers, ADCs, DACs, and other high-performance analog circuitry, where its high power-supply rejection suppresses upstream switching-converter ripple. Typical applications include RF PLL/VCO power supplies in transceivers, audio DAC/ADC analog rails, precision test-and-measurement instrumentation, and industrial systems running from 24 V buses where the 36 V input rating provides ample headroom. A key design consideration is thermal budget: at large input-to-output differentials and full 1 A load, dissipation can reach several watts, so the exposed pad must be soldered to a generous copper pour. The NR/SS capacitor also sets soft-start and noise-reduction bandwidth and should not be omitted. This page synthesizes distributor pricing (as of 2026-09-01), drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS7A5401RPST - 4A LDO Regulator, 1.1V VIN, 4.4µV Noise | Texas Instruments
The Texas Instruments TPS7A5401RPST is a 4-A, low-VIN (1.1-V), low-noise (4.4 µVRMS), high-accuracy, ultra-low-dropout (LDO) linear regulator in a 12-VQFN-HR (RPS, 2.2 mm x 2.5 mm) package with adjustable output from 0.8 V to 5.15 V. It sources up to 4 A with only 175 mV of maximum dropout, delivering high PSRR across the audio band and a tiny thermal footprint suited to dense multi-rail designs. An LDO (low-dropout linear regulator) is a type of voltage regulator that maintains a regulated output even when its input voltage approaches the output voltage with only minimal headroom (the dropout). LDOs sit inside the broader hierarchy of linear regulators, which in turn belong to the voltage regulator family and the wider power-management IC category. Unlike switching DC-DC converters, LDOs dissipate the difference between VIN and VOUT as heat but add no switching noise, making them ideal for post-regulation of switching rails or for powering noise-sensitive analog circuitry. Key specifications include 4.4 µVRMS output noise (10 Hz to 100 kHz), high PSRR of approximately 40 dB at 1 MHz, 4 A continuous output current, 175 mV maximum dropout at full load, and a sub-1.1 V minimum input voltage that allows direct operation from a 1.2 V or 1.8 V system rail without a preceding boost. Thermal resistance is engineered to support the 4 A load in a 2.2 x 2.5 mm outline when mounted with proper copper pours. Architecturally, the TPS7A54 uses TI's advanced bipolar process with a precision bandgap reference, soft-start, current limit, and thermal shutdown. The exposed die-pad package enables direct heat extraction from the silicon into the PCB copper, critical at 4 A. Combined with its wide 0.8 V to 5.15 V adjustable output range, the device targets high-current, low-noise point-of-load applications including FPGA core/SerDes rails, ASIC supplies, and precision data-acquisition power trees. Typical applications include powering noise-sensitive RF/SerDes blocks in networking line cards, FPGA and ASIC core rails in compact compute modules, high-current load-point regulation for test and measurement, and post-DCDC filtering for sensitive analog front ends in industrial and communications equipment. When designing with this LDO, prioritize a low-impedance PCB copper pour under the exposed pad and place input/output ceramics as close to the pins as possible. For VIN-to-VOUT headroom above ~0.5 V at 4 A, derate continuously or use airflow; the 12-VQFN-HR package is small but dissipation scales linearly with drop. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet itself, plus pinout, comparison table, and selection guidance for engineers evaluating the TPS7A5401RPST for production use.
TPS7A6333QPWPRQ1 - 300mA 40V Automotive LDO | Texas Instruments
The Texas Instruments TPS7A6333QPWPRQ1 is an automotive-grade low-dropout linear regulator (LDO) that delivers a fixed 3.3V output with up to 300mA of load current. It is engineered for off-battery applications, operating from a wide input voltage range up to 40V with 45V transient tolerance, making it ideal for harsh automotive electrical environments. A low-dropout regulator (LDO) is a linear voltage regulator that maintains a regulated output voltage even when the input supply is only slightly above the output. This category of voltage regulator sits within the power management IC hierarchy, providing clean, low-noise rails for sensitive loads. The TPS7A6333QPWPRQ1 features an ultra-low quiescent current of 35 µA (typical) at light loads and a sleep mode current of less than 2 µA when the enable pin is pulled low, reducing battery drain in always-on systems. Key features of this device include a 300mV dropout voltage at maximum output current, an integrated programmable window watchdog timer, and overcurrent protection. The LDO is stable with low-ESR ceramic output capacitors, simplifying external component selection and board layout. Its HTSSOP-14 (PWP) package with exposed pad provides good thermal performance, while the AEC-Q100 qualification ensures reliability in automotive environments. The TPS7A6333QPWPRQ1 is designed for off-battery supply rails in automotive ECUs, body control modules, and infotainment systems. The watchdog timer monitors the microcontroller and provides an independent reset mechanism, improving system reliability. The device also provides robust protection against overcurrent, safeguarding downstream loads. When using this LDO, designers must ensure sufficient input-output voltage headroom to maintain regulation under load transients. The enable pin allows power sequencing, and the watchdog output should be connected to the system reset line for proper fault monitoring. Consult the TI datasheet for detailed application circuits and layout guidelines.
TPS7A6633QDGNRQ1 - 150mA 40V Off-Battery LDO | Texas Instruments
The Texas Instruments TPS7A6633QDGNRQ1 is an automotive-grade, 150-mA, 40-V off-battery low-dropout (LDO) linear regulator that delivers a fixed 3.3V output from a 4V to 40V input range in an 8-pin HVSSOP (DGN) package with power-good indicator. It is qualified to the AEC-Q100 standard, drawing only 12 uA quiescent current at no load, making it well-suited for standby microcontroller power in automotive body and chassis ECUs. 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 taxonomy of voltage regulators, LDOs sit alongside switching regulators (buck/boost/buck-boost converters) as a sub-category of power management ICs (PMICs). Unlike a switching DC-DC converter, an LDO dissipates the VIN-VOUT difference as heat and therefore introduces no switching ripple, which is why off-battery automotive rails favor LDOs for noise-sensitive MCU cores and CAN transceivers. Key features of the TPS7A6633QDGNRQ1 include an integrated power-good (PG) open-drain output for MCU reset sequencing, short-circuit and over-current protection, thermal shutdown, and an input voltage tolerance that survives 45V load-dump transients. The HVSSOP-8 (DGN) PowerPAD package keeps thermal resistance low for sustained 150-mA loads in cramped under-hood layouts. The device uses a p-channel pass architecture with an internal bandgap reference, achieving tight output accuracy across the -40C to +125C automotive grade-1 temperature range. The reset delay on power-up (programmed by an external capacitor on the NR/SS pin) and the PG output combine to form a deterministic power-on sequence for the host MCU and CAN/LIN transceivers. Typical applications include always-on body-control modules, HVAC clusters, instrument-panel MCUs, RKE receivers, and lighting controllers where the part sits directly on the unswitched 12V battery rail. The wide VIN tolerance also suits industrial 24V PLC supplies with similar standby-power constraints. When designing with this part, place the input and output bulk capacitors as close to the IC as possible and use a low-ESR ceramic on the output to maintain loop stability; an input capacitor of at least 0.1 uF plus the recommended output capacitance is mandatory. Choose the PG pull-up to a logic-compatible rail (typically VOUT itself) so the host MCU sees a clean reset during crank and cold-start events. This page synthesizes distributor pricing, AEC-Q100 alternative coverage, and practical PCB layout notes not found in the manufacturer datasheet alone.
TPS7A6650QDGNRQ1 - 150mA 40V Off-Battery LDO | TI
The Texas Instruments TPS7A6650QDGNRQ1 is a 150-mA automotive-grade low-dropout (LDO) linear regulator accepting up to 40 V on the input and providing a fixed 5.0 V output, designed to operate directly from an automotive battery rail. It is offered in an 8-pin HVSSOP (PowerPAD MSOP, DGN) package with an exposed thermal pad that keeps junction temperatures low in standby-supply service. An LDO (Low-Dropout) linear regulator is a non-switching DC voltage regulator that maintains a tightly regulated output voltage even when the input-to-output differential voltage is small. As a member of the linear-regulator family, which itself belongs to the broader voltage-regulator and power-management IC hierarchy, the TPS7A6650-Q1 trades efficiency for noise cleanliness - it adds no switching ripple on its output, which is critical for keep-alive supplies that must not couple noise onto a vehicle's data network. Key specifications include an input voltage range of 4 V to 40 V (with 45-V transient survival), a 12-microampere quiescent current at no load, integrated short-circuit and overcurrent protection, a programmable power-good reset delay, and an operating junction temperature range of -40 °C to +125 °C. The part is qualified to AEC-Q100 grade 1 for automotive use, and is shipped in MSL-Level-3 packaging suitable for automotive production lines. The TPS7A6650-Q1 uses a bipolar pass architecture with a precision bandgap reference and an integrated power-good comparator, allowing the regulator to deliver a clean 5 V rail while signalling a valid output to a microcontroller through the PG pin. Reset delay is set by an external capacitor on the RESET_DELAY pin, eliminating the need for a separate supervisory IC. Typical applications include automotive standby microcontroller power (for body-control modules, instrument clusters, and remote keyless-entry receivers), off-battery always-on rails, CAN/LIN transceivers, and remote sensing modules that must survive load-dump transients on the vehicle bus. When designing with this regulator, route both input and output capacitors as close as possible to the IC pins and bond the exposed thermal pad to a copper pour of at least 1 square inch - the standby current is so low that thermal stress is normally a non-issue, but the high VIN margin means even brief short-to-battery events must be considered. This page synthesises distributor pricing, AEC-Q100 drop-in cross-references, and practical PCB layout notes that go beyond the manufacturer datasheet, giving automotive engineers a faster path to a robust keep-alive supply.
TPS7A7002DDA - 3A Low-VIN LDO Regulator w/ Enable | Texas Instruments
The Texas Instruments TPS7A7002DDA is a 3 A, low-VIN (1.4 V), adjustable ultra-low-dropout (LDO) linear voltage regulator with enable, supplied in an 8-pin SO PowerPad (HSOIC EP, DDA) package with an exposed thermal pad. The device operates from a single input rail as low as 1.425 V and delivers up to 3 A of continuous load current with a maximum dropout of 600 mV at full load (380 mV at 2 A). The output is adjustable from 0.5 V up to 5 V using an external resistor divider, allowing it to power FPGAs, DSPs, ASIC core rails, and point-of-load post-regulation from a noisy upstream DC-DC converter. 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 marginally higher than the output. In the broader power-management hierarchy, an LDO sits beneath switching regulators: a switcher first steps down the bus voltage with high efficiency, then an LDO cleans the residual ripple and provides a low-noise rail. This two-stage architecture is now standard for powering noise-sensitive analog, RF, and digital load circuits from intermediate bus voltages such as 3.3 V or 5 V. Key features of the TPS7A7002 include 1 uA ground current in shutdown for battery-powered applications, current-limit and thermal-shutdown protection, an active-high EN pin for power sequencing, and a stable output with low-ESR ceramic output capacitors. The dropout voltage at 2 A is only 380 mV maximum, and at 3 A is limited to 600 mV maximum, allowing the regulator to hold regulation in headroom-constrained designs where VIN approaches VOUT. The HSOP-8 PowerPad package provides a low thermal-resistance path, dissipating up to several watts continuously without external heatsinking. The TPS7A7002 uses a PNP pass architecture that achieves very low dropout and excellent transient response when paired with ceramic output capacitors. The internal reference, soft-start, and current-limit blocks are designed for stable operation across the full -40 C to +125 C junction temperature range. The adjust pin allows the output to be programmed anywhere from 0.5 V to 5 V by R1/R2 feedback network, while the EN pin can be used for power sequencing across multiple rails. Typical applications include powering FPGA core and I/O rails, ASIC and DSP core supplies, post-regulation after a switching converter, low-voltage distributed power architectures in telecom and networking equipment, and any application that requires a high-current, low-noise point-of-load rail from a 1.5 V, 1.8 V, 2.5 V, 3.3 V, or 5 V intermediate bus. When designing with this device, ensure that the PCB copper area under the exposed pad is sufficient to keep the junction temperature within the safe operating area under worst-case load. Use 1% feedback resistors and a 10 uF or larger low-ESR ceramic output capacitor placed as close to the VOUT pin as possible; a feedforward capacitor across the top feedback resistor improves noise and transient performance.
TPS7A7200RGWR - 2A, 6.5V Ultra-LDO with PG/EN | Texas Instruments
The Texas Instruments TPS7A7200RGWR is a 2-A, ultra-low-dropout (LDO) linear regulator housed in a 20-pin VQFN (RGW) 5x5 mm package with exposed thermal pad, featuring user-configurable output voltage from 0.9 V to 3.5 V, an integrated power-good (PG) indicator, and an active-high enable (EN) pin. It accepts an input voltage from 1.5 V to 6.5 V and exhibits only 180 mV dropout at the full 2 A load, while supporting 1.43 V minimum VIN operation. Per the TI datasheet SBVS203A, the part delivers very fast load-transient response, making it suitable for powering low-voltage digital cores directly from 1.5 V rails. 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, contrasting with switching regulators that use inductors and PWM control. LDOs belong to the linear regulator family, which sits under the voltage regulator hierarchy, which in turn belongs to the broader power management IC category. The TPS7A7200RGWR specifically targets high-current, low-voltage point-of-load (POL) conversion applications where a switching regulator's ripple would be unacceptable, trading efficiency for noise-free output and minimal BOM count. Key differentiating features of the TPS7A7200RGWR include 180 mV dropout at 2 A (one of the lowest in its class), user-configurable output voltage from 0.9 V to 3.5 V without external feedback resistors (eliminating the error and drift these would introduce), integrated open-drain PG output for rail sequencing and fault monitoring, and active-high EN for on/off management. The device also features internal soft-start to limit inrush current, thermal shutdown, and current-limit protection. The VQFN-20 (RGW) package provides a low thermal resistance path that helps dissipate the heat generated when VIN-VOUT differential is large. Technically, the TPS7A7200RGWR uses an internal P-channel pass element architecture (PMOS LDO), which is why its dropout is so low - PMOS LDO dropout is roughly RDS(on) x ILoad rather than Vth-limited like an NPN or N-channel LDO. The 0.9 V to 3.5 V output range is set via factory-configurable pin straps, meaning no external resistor divider is needed, and the output tolerance is tightened by avoiding external resistor drift over temperature. Typical applications include powering FPGAs, DSPs, ASICs, and microcontrollers from 1.5 V, 1.8 V, 2.5 V, 3.3 V or 3.5 V rails, post-regulation after a switching DC-DC converter to clean up switching noise, and powering sensitive analog/RF blocks that demand low ripple. The fast transient response makes it ideal for digital loads with rapid current steps. When using this device, ensure the input-to-output voltage differential remains within SOA limits to avoid excessive power dissipation, especially at 2 A full load - use adequate copper pours on the exposed pad.
TPS7A78 - 120mA Smart Cap-Drop LDO | Texas Instruments
The Texas Instruments TPS7A78 is a 120-mA, smart, capacitance-drop (cap-drop), low-dropout (LDO) linear voltage regulator designed for non-isolated AC/DC conversion. It uses an external high-voltage capacitor (CS) and an internally controlled active bridge rectifier to create a regulated DC output voltage from an AC mains input, eliminating the need for bulky magnetic transformers. This innovative architecture enables compact, low-cost, and highly efficient power supplies for low-power applications. A capacitance-drop regulator is a type of AC/DC converter that uses a capacitor to drop the AC voltage before rectification and regulation. Unlike traditional transformer-based supplies, it is non-isolated and relies on a series capacitor to limit current, making it lightweight and cost-effective. The TPS7A78 belongs to the family of linear voltage regulators, specifically smart LDOs that integrate active rectification and clamping to improve efficiency and standby power. Key features include a wide input voltage range of 85VAC to 265VAC, a fixed output voltage of 3.3V or 5V, and a maximum output current of 120mA. The device achieves high efficiency by actively clamping the rectified voltage, reducing power dissipation. It also features low quiescent current, thermal shutdown, and overcurrent protection, ensuring robust operation in harsh environments. The TPS7A78 is available in a 14-pin HTSSOP (PWP) package, which provides excellent thermal performance and a compact footprint. Technically, the TPS7A78 integrates a full-wave bridge rectifier using internal MOSFETs, which are controlled to minimize voltage drop and power loss. The external cap-drop capacitor (CS) is selected based on the desired output current and input voltage, allowing designers to optimize the trade-off between size and performance. The device also includes an internal clamp that limits the rectified voltage to a safe level, protecting downstream circuitry from overvoltage conditions. Typical applications include smart meters, home automation, IoT devices, LED lighting, and other low-power appliances that require a compact, non-isolated power supply. The TPS7A78 is particularly suited for applications where space is limited and where magnetic components are undesirable due to cost or EMI concerns. Its high efficiency and low standby power make it ideal for always-on devices that need to meet stringent energy regulations. When designing with the TPS7A78, it is critical to select the appropriate cap-drop capacitor (CS) value and voltage rating based on the input voltage and load current. Additionally, proper PCB layout is essential to minimize parasitic inductance and ensure stable operation. The device's thermal performance should be evaluated under worst-case conditions, and adequate copper area should be provided for heat dissipation.
TPS7A8001DRBT - 1A LDO, 6V Adjustable, Low-Noise SON-8 | TI
The Texas Instruments TPS7A8001DRBT is a low-noise, wide-bandwidth, high-PSRR, low-dropout 1-A linear regulator (LDO) housed in an 8-pin SON (DRB) package measuring 3 mm x 3 mm. It accepts an input voltage range of 2.2 V to 6.5 V and delivers an adjustable output from 0.8 V to 6.0 V at up to 1 A of continuous load current, while exhibiting a low dropout of approximately 170 mV at 1 A. 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. As a member of the broader linear regulator family, it falls within the voltage regulator category and ultimately the power management IC hierarchy used in modern electronic systems. Unlike switching regulators, LDOs do not introduce switching noise into the rail, which is the primary reason they are preferred for noise-sensitive analog and RF signal chains. Key specifications include 32 uVrms output noise (0.1 Hz to 100 kHz), 63 dB PSRR at 1 kHz, and 60 dB PSRR at 1 MHz, achieved through an advanced BiCMOS process and a PMOSFET pass element. The device also provides an active-high enable (EN) input for sequenced power-up, internal soft-start, current limit, and thermal-shutdown protection. The exposed thermal pad on the DRB package keeps junction-to-ambient thermal resistance low for high-current operation. The TPS7A80 architecture combines a precision bandgap reference with a high-gain error amplifier driving the PMOS pass device. This topology minimizes load-transient overshoot while maintaining high DC accuracy, making the regulator well suited as a post-regulator stage following a noisy switching converter. Typical applications include powering RF transceivers and PLLs in wireless infrastructure, FPGA and DSP core rails in industrial embedded systems, noise-sensitive ADC and DAC reference supplies, and portable/battery-powered electronics where low quiescent current and high efficiency at light loads extend battery runtime. When designing with the TPS7A8001DRBT, ensure that the input-to-output differential does not exceed 6.5 V at any time, use a minimum 2.2 uF ceramic input capacitor for stability, and provide adequate PCB copper area beneath the exposed pad to manage up to 1 A continuous dissipation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on individual distributor listings, providing engineers a single, citable reference for evaluation and sourcing.
TPS7A8300RGRR - 2A Low-Noise LDO, 6uVRMS | Texas Instruments
The Texas Instruments TPS7A8300RGRR is a low-noise (6 uVRMS), low-VIN, ultra-low-dropout voltage regulator (LDO) capable of sourcing a 2-A load with only 125 mV of maximum dropout. It provides a user-programmable output from 0.8V to 5V and is packaged in a 20-pin VQFN (3.5x3.5 mm) with exposed thermal pad. An LDO (Low-Dropout) linear regulator is a voltage regulator that maintains a stable output even when the input voltage is very close to the output voltage. It is a subclass of linear regulators within the broader voltage regulator and power management IC hierarchy, essential for noise-sensitive circuits where switching regulators introduce unacceptable ripple and EMI. Key features include the 6 uVRMS output noise (10 Hz to 100 kHz), the ANY-OUT architecture that lets the output voltage be programmed via PCB pin connections up to 3.95V without external resistors, and a power-good (PG) output. Enable and soft-start functions are integrated, along with overcurrent and thermal shutdown protection. Dropout of only 125 mV at 2 A enables high-efficiency, low-headroom designs. Architecturally, the TPS7A8300 uses a PMOS pass element with a precision reference. Its low-VIN capability and ceramic-capacitor stability simplify BOM and layout. Excellent line/load regulation and high PSRR make it well suited to post-regulation of switching converter rails. Typical applications include RF transceiver and PLL power rails, audio DAC/ADC supplies, FPGA and processor core voltages, and precision analog front-ends in industrial and communications equipment. Design tip: solder the exposed pad to a substantial copper pour for thermal dissipation, configure the ANY-OUT sense pins correctly for the target voltage, and provide 10 uF ceramic output capacitance for stability.