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TPS3711DDCR - 36V Wide-Supply Voltage Detector | Texas Instruments
The Texas Instruments TPS3711DDCR is a wide-supply voltage comparator that operates over a 1.8 V to 36 V range in a 6-pin SOT-23-THIN (DDC) package. The device features a precision comparator with an internal 400 mV reference and an open-drain output rated to 25 V for undervoltage detection. The monitored voltage is set with external resistors, allowing flexibility for any threshold between 400 mV and 6 V. What is a voltage supervisor (also called a voltage detector or reset IC)? A voltage supervisor is a power-management IC that continuously monitors a supply rail and asserts a reset or fault signal when the rail falls outside a programmed window. Supervisors sit hierarchically under power management ICs, alongside LDOs, DC-DC converters, and battery monitors. They are essential building blocks in microcontrollers, SoCs, and FPGA-based systems, where brown-outs or power-rail glitches can cause latch-up, memory corruption, or undefined logic states. Key features include a wide 1.8 V to 36 V operating range, internal 400 mV ±1.5% reference, open-drain output capable of pulling to 25 V, low quiescent current in the microamp range, and a small SOT-23-6 footprint. The TPS3711 uses OUT driven low when the voltage at the SENSE pin drops below the negative threshold and returns high when SENSE recovers, giving designers a clean logic-level reset signal with a known pull-up reference. The TPS3711DDCR uses a precision analog comparator with an internal bandgap-derived 400 mV reference. The open-drain output stage allows the reset signal to be pulled up to any voltage up to 25 V, independent of the device supply, which is essential for interfacing low-voltage MCUs to higher-voltage rails. The SOT-23-THIN package provides a compact footprint while maintaining industrial -40°C to +125°C operating range. Typical applications include industrial PLCs and process controllers, automotive body and infotainment modules, battery management systems, microcontroller brown-out detection, and overvoltage/undervoltage protection in 12 V and 24 V industrial buses. The wide supply range is particularly valuable for 24 V industrial systems where traditional 5 V-only supervisors cannot operate directly from the bus. When designing with the TPS3711, select the external resistor divider so that the sensed voltage equals 400 mV at the desired threshold. A 100 kΩ to 1 MΩ total resistance keeps quiescent current low without making the SENSE pin noise-sensitive. Always pull OUT up to a valid logic rail through a resistor; do not leave it floating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TPS3801L30DCKRG4 - 2.64V Voltage Supervisor SC-70-5 | TI
The Texas Instruments TPS3801L30DCKRG4 is an ultra-small supply voltage supervisor IC that monitors a single 2.64V rail, packaged in a 5-pin SC-70 (SOT-323, TI package code DCK) with an active-low, push-pull RESET output. It belongs to the TPS380x family of microprocessor supervisory circuits and offers a fixed threshold of 2.64V with 200 ms typical reset delay. The 'L30' suffix denotes the specific 2.64V threshold variant within the family. The 'G4' suffix indicates a Pb-free, RoHS-compliant, green-grade reel packaging option from TI. A voltage supervisor (also called a reset IC or power-on reset supervisor) is a power-management device that holds a host processor in reset until the supply rail is stable and within tolerance. Voltage supervisors sit in the hierarchy below LDOs and DC-DC converters, ensuring that downstream processors do not execute code or access peripherals at indeterminate logic levels during power-up, brown-out, or transient dropout events. The TPS3801L30DCKRG4's push-pull active-low RESET output makes it directly compatible with CMOS logic inputs on most DSPs and microcontrollers without needing an external pull-up resistor. Key features include an ultra-low supply current of 9 µA typical, ensuring negligible load on the monitored rail. The reset output remains asserted as long as VDD is below the threshold and continues for 200 ms after VDD rises above the threshold, satisfying the reset timing requirements of most DSP and MCU families. The SC-70-5 package measures roughly 2.0 mm x 1.25 mm, making it among the smallest supervisors available. The device operates across an industrial temperature range of -40C to +85C and is qualified to TI's standard JEDEC reliability flow. Internally, the TPS3801L30DCKRG4 uses a precision bandgap reference and comparator topology. A voltage divider and reference comparator generate the reset signal, while an internal timer block produces the 200 ms delay using an on-chip oscillator. The push-pull output stage actively drives both high and low, eliminating external pull-up components and reducing BOM count. Typical applications include DSP/FPGA power supervision in portable and battery-powered equipment, microcontroller reset generation in industrial sensors, single-rail monitoring in handheld medical devices, and brown-out protection in IoT endpoints. The SC-70-5 footprint makes it well-suited for space-constrained designs. When designing with this device, place it as close as possible to the IC it monitors, and route VDD through a short, wide trace to minimize voltage drop during high-current transients. Ensure the monitored rail's nominal value stays well above the 2.64V threshold with adequate margin under worst-case load. This page synthesizes distributor pricing, SC-70-5 drop-in alternatives within the TPS380x family, and practical design notes not found in the manufacturer datasheet alone.
TPS3808G01QDBVRQ1 - Auto Voltage Supervisor, 0.4V-5V SENSE | TI
The Texas Instruments TPS3808G01QDBVRQ1 is an AEC-Q100 qualified microprocessor supervisory circuit that monitors system voltages from 0.4 V to 5 V and asserts an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin is driven low, all housed in a 6-pin SOT-23 (DBV) package. It features an adjustable reset threshold, a programmable reset delay from 1.25 ms to 10 s using an external capacitor, and a very low typical quiescent current of 2.4 mA, making it well suited for automotive and industrial always-on monitoring rails where standby power budget is critical. A voltage supervisor IC (also called a reset supervisor or voltage monitor) is a power management integrated circuit that observes a system rail and generates a clean reset signal to a microcontroller, SoC, or FPGA whenever that rail falls outside its valid operating window. Voltage supervisors sit hierarchically above DC-DC converters and LDOs in the power tree: DC-DC converters and LDOs regulate the rail, while supervisors verify the rail is healthy and force the processor into a known-good reset state on faults such as brown-out, power-up glitch, or slow ramp. They are fundamental building blocks for functional-safety designs (ISO 26262, IEC 61508) and any application that must boot deterministically. The TPS3808G01QDBVRQ1 combines high threshold accuracy across the full -40 C to +125 C automotive Grade-1 range, an active-low RESET output with open-drain topology that allows wired-OR connection of multiple supervisors, a manual-reset input for operator or host push-button reset, and a programmable delay capacitor pin (CT) that decouples the watchdog timing from the supply ripple. Compared with simple internal MCU brown-out detectors, this part provides a tighter threshold tolerance and a cleaner, externally programmable reset pulse width that is independent of firmware code paths. Typical applications include automotive ECU power-good monitoring, ADAS sensor rail supervision, body and chassis controller reset management, industrial PLC watchdog, and battery-powered IoT node supply monitoring. The wide SENSE input range also enables direct supervision of low-voltage rails (down to 0.4 V) used by modern processors without auxiliary dividers in many cases. When designing with this device, place the CT delay capacitor close to the CT pin and use a 1.5 nF X7R ceramic for an approximate 100 ms reset delay per capacitor value guidelines. Ensure the pull-up resistor on open-drain RESET is sized to the downstream logic level and routed away from noisy switching nodes to avoid false resets during load transients. This page aggregates distributor stock, drop-in SOT-23-6 alternatives, and practical design considerations that complement the TI datasheet and help engineers shorten the BOM selection and qualification cycle for automotive supervisory circuits.
TPS3808G01QDRVRQ1 - Auto-Q1 0.4-5V Adj Supervisor | Texas Instruments
The Texas Instruments TPS3808G01QDRVRQ1 is an AEC-Q100-qualified, low-quiescent-current microprocessor supervisory circuit that monitors system voltages from 0.4 V to 5 V in a 6-pin WSON (DRV, 2x2 mm) package. It asserts an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin is driven low, and holds RESET low for a user-adjustable delay time after both SENSE and MR return above their thresholds. A voltage supervisor (also called a reset IC or voltage monitor) is a dedicated power-management device that observes one or more system rails and generates a clean reset signal to a microcontroller, FPGA, ASIC, or processor whenever the rail sags, droops, or falls out of specification. Voltage supervisors sit below DC-DC converters and LDOs in the power-tree hierarchy and above the digital logic that depends on valid supply rails. By separating the monitoring function from the regulator, designers can guarantee deterministic boot and brown-out behavior independent of converter load transients. Key features include an adjustable SENSE threshold down to 0.405 V with high threshold accuracy, a programmable reset delay from 1.25 ms to 10 s via an external capacitor on the CT pin, very low quiescent current of 2.4 uA typical, and an open-drain active-low RESET output that supports wired-OR with other supervisors. The device operates from a 1.7 V to 6.5 V VDD supply and tolerates SENSE voltages up to 6.5 V independent of VDD, simplifying dual-rail monitoring. The TPS3808G01QDRVRQ1 is the automotive-grade (-Q1) version of the TPS3808G01DRVR and adds AEC-Q100 qualification, extended temperature support, and PPAP documentation for safety-critical automotive designs. Internally, a precision bandgap reference, comparator, and delay-timing block combine to give a glitch-immune, monotonic RESET behavior even during fast load steps. Typical applications include automotive ECU power-rail monitoring, ADAS sensor supplies, body and chassis modules, industrial PLC supervisory circuits, battery-powered IoT sensor nodes, and FPGA/MCU brown-out protection. The combination of 2.4 uA IQ and a tiny 2x2 mm WSON footprint makes it ideal where board area and standby drain are at a premium. Designers should place the CT capacitor close to the CT pin and use a 0.1 uF VDD bypass capacitor within 1 mm of the device. Compared with the non-automotive TPS3808G01DRVR, the Q1 variant is the drop-in choice when an AEC-Q100 release is required.
TPS3808G18DRVR - 1.8V Voltage Supervisor, 2.4µA Iq, WSON-6 | TI
The Texas Instruments TPS3808G18DRVR is a low-quiescent-current, programmable-delay microprocessor supervisory circuit that monitors a 1.8V system rail in a 6-pin WSON (DRV, 2x2 mm) package. It features a fixed 1.8V sense threshold with 0.5% typical accuracy, an open-drain RESET output, manual reset (MR) input, and an adjustable reset delay time set by an external capacitor up to 10 s. A voltage supervisor (also called a reset IC, voltage monitor, or power-on reset circuit) is a power management IC that observes a system supply rail and asserts a reset signal whenever the rail falls outside its valid operating window. Supervisors sit hierarchically above DC-DC converters and LDOs in the power tree: they do not generate power themselves but rather guarantee that downstream logic (microcontrollers, FPGAs, ASICs, DSPs) only starts up after the rail has stabilized, and re-enters reset whenever the rail dips below a safe threshold. The TPS3808 family belongs to the supervisor category within TI's broader Power Management IC portfolio. Key features of the TPS3808G18DRVR include a typical quiescent current of 2.4 µA (critical for battery-powered designs), 20 ms minimum reset delay (factory-trimmed, capacitor-adjustable up to 10 s), open-drain RESET output for wired-OR with other rails, an active-low manual reset input, and a wide operating temperature range of -40°C to +125°C. The 2x2 mm WSON-6 footprint occupies roughly 4 mm² of PCB area, suiting it for space-constrained wearables, IoT endpoints, and sensor nodes. Architecturally, the TPS3808 combines a precision bandgap reference, a comparator chain, a programmable delay timer, and an open-drain NMOS output stage. The factory-trimmed 1.8V sense threshold means no external resistor divider is required, reducing BOM count and eliminating trim errors. The CT pin accepts an external capacitor to set tD = 2.39 × 10^5 × CCT (seconds), giving the designer flexible power-on reset timing. Typical applications include 1.8V core rail monitoring in IoT sensors and wearables, FPGA/MCU brown-out protection in battery-powered systems, point-of-load monitoring in multi-rail designs, and industrial sensor nodes that require deterministic startup. The 2.4 µA Iq makes the part well suited to coin-cell and lithium-thionyl-chloride powered devices that must remain in standby for years. When designing with this part, place the CT capacitor as close as possible to the CT pin to minimize leakage paths and to ensure accurate delay timing. Pull-up resistance on the open-drain RESET output must respect the V_PULLUP rail used by the downstream logic; tying RESET to a different rail than VDD is a supported use case. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - giving engineers a single decision-ready reference.
TPS3808G33QDBVRQ1 - 3.3V Auto Voltage Supervisor | Texas Instruments
The Texas Instruments TPS3808G33QDBVRQ1 is an automotive-qualified, ultra-low quiescent current voltage supervisor with a fixed 3.3V sense threshold, housed in a 6-pin SOT-23 (DBV) package. It monitors system voltages from 0.4V to 6.5V and asserts an active-low open-drain RESET signal when SENSE drops below the preset threshold or when the manual reset (MR) pin is pulled low. With typical quiescent current of just 2.4 uA, it is purpose-built for always-on battery-powered applications. A voltage supervisor (also called a reset supervisor or power-on reset generator) is a power management IC that monitors a supply rail and asserts a RESET signal whenever the rail falls outside a preset window. Supervisors sit alongside LDOs and DC-DC converters in the broader power management IC hierarchy and are essential building blocks for microcontroller and DSP-based systems where deterministic startup behavior and brown-out protection are required. Key features include 2.4 uA typical quiescent current, 10 ms to 10 s programmable reset delay time set by an external capacitor on the CT pin, 0.5% typical threshold accuracy, and a wide operating temperature range of -40C to +125C qualified to AEC-Q100 for automotive use. The open-drain RESET output allows wire-OR connection with other supervisory signals and direct interface to multi-voltage systems. The TPS3808G33QDBVRQ1 uses a precision bandgap reference and a hysteretic comparator architecture to provide stable threshold detection across temperature and process variations. The MR input supports an external push-button reset and accepts slow or noisy signals through its built-in debounce. The CT programmable delay pin lets designers tune the reset pulse width to match downstream processor timing requirements. Typical applications include automotive ECU power supervision, battery-powered IoT devices, industrial PLC controllers, and FPGA / MCU brown-out protection. In automotive body and chassis modules, the supervisor guarantees defined reset behavior during cranking transients and load-dump events. When designing with this device, place the CT capacitor close to pin 6 and ensure pull-up on the open-drain RESET output matches the downstream logic level. Verify sense voltage accuracy across the full operating temperature range, and consider derating quiescent current at elevated temperatures. This page synthesizes distributor pricing, automotive-grade cross-reference alternatives, and practical design notes not found in the manufacturer datasheet alone.
TPS3808G50QDBVRQ1 - 5V Auto-Q1 Voltage Supervisor SOT-23-6 | Texas Instruments
The Texas Instruments TPS3808G50QDBVRQ1 is an AEC-Q100 qualified, automotive-grade microprocessor supervisory circuit in a 6-pin SOT-23 (DBV) package, designed to monitor a 5.0 V system rail and assert an active-low open-drain RESET signal when the sensed voltage drops below a factory-preset threshold. According to TI product literature, the device integrates a power-on reset generator with an adjustable delay time, supports a manual reset (MR) input, draws a typical quiescent current of 2.4 mA, and operates across a -40°C to +125°C automotive temperature range. A voltage supervisor (or reset IC) is a power-management device that observes a supply rail and forces a microcontroller or processor into a known-good boot state whenever the rail falls out of regulation. Supervisors sit beneath the broader power-management IC (PMIC) hierarchy, alongside LDOs, DC-DC converters, and battery chargers, and they serve as the last line of defense against corrupted firmware execution caused by brown-outs, in-rush transients, or load steps. Unlike discrete RC reset circuits, supervisors deliver precise threshold accuracy and predictable timing independent of capacitor leakage. Key features of the TPS3808G50QDBVRQ1 include a high threshold accuracy of 1.0% (typical), an adjustable reset timeout set by an external CT capacitor, an active-low open-drain RESET output that can be wire-ORed with other rails, and a dedicated manual reset pin for push-button or host-driven assertion. The SOT-23-6 footprint occupies only 2.9 mm × 1.6 mm of board area, making it suitable for space-constrained modules. The Q1 suffix denotes TI's automotive grade, qualifying the device for AEC-Q100 stress testing. Internally, the device combines a precision bandgap reference, a comparator, a delay timer, and an open-drain output stage. The SENSE input is compared against the internal 5.0 V threshold; when the voltage falls below threshold, the output asserts low and the programmable delay (set by CT) is initiated once SENSE recovers above threshold. This architecture decouples the monitor trip point from the delay timing, allowing the system designer to choose the wake-up behavior independently from the brown-out trip point. Typical applications include automotive ECU power supervision, ADAS sensor modules, body and chassis controllers, infotainment head-unit rail monitoring, and any industrial system requiring a compact, AEC-Q100 qualified supervisor for a 5 V logic rail. The 1.7 V to 6.5 V input range also covers 3.3 V rails when the G50 variant's nominal 5.0 V threshold is intentionally chosen for early-warning supervision. When designing with this part, place the CT capacitor close to the CT pin to avoid leakage paths that would alter the delay time, and use a pull-up resistor on RESET sized for the load capacitance. Verify that the SENSE pin is bypassed at high dV/dt loads to prevent false tripping. This page combines distributor pricing, drop-in pin-compatible alternatives, and practical design notes not aggregated on the manufacturer product page.
TPS3825-50DBVR - 5V SOT-23-5 Voltage Supervisor w/ Manual Reset | TI
The Texas Instruments TPS3825-50DBVR is a voltage supervisor (reset IC) with manual reset, monitoring a fixed 5.0V threshold in a 5-pin SOT-23 (DBV) package operating from -40C to +85C. It provides circuit initialization and timing supervision primarily for DSP and processor-based systems, with push-pull, totem-pole active-low RESET output and a factory-set reset delay time. A voltage supervisor, also known as a reset IC or voltage monitor, is a power management device that observes a system supply rail and asserts a reset signal whenever the rail falls below a precise threshold. The device category sits hierarchically under supervisors and reset ICs, then power management, then power management ICs, and ultimately semiconductors. Supervisors prevent microcontrollers, DSPs, FPGAs, and ASICs from executing code with an under-voltage supply, which can cause unpredictable latch-up or memory corruption. Key features include a fixed 5.0V supply voltage supervision range, push-pull totem-pole RESET output topology, manual reset input (MR), an integrated watchdog timer, and a power-on reset generator that asserts when VDD exceeds 1.1V. The RESET signal stays asserted for a fixed delay time after VDD recovers, allowing the downstream processor's clock and PLL to stabilize before code execution resumes. The SOT-23-5 footprint makes it compatible with space-constrained portable and embedded designs. The TPS3825-50DBVR architecture combines a precision bandgap reference, comparator, and timer block on a single die. During power-up the reset asserts immediately when VDD crosses 1.1V and remains asserted until VDD exceeds 4.55V (the 5V nominal threshold) plus the timeout delay. The watchdog subsystem expects a falling edge on the WDI pin within the watchdog window; failure to receive that edge asserts reset to indicate a firmware hang. Typical applications include DSP and microcontroller supply monitoring in industrial controls, point-of-sale terminals, automotive infotainment (via the -Q1 grade), PLCs, and any 5V system requiring supervised power-up, brownout protection, and watchdog supervision. For 3.3V systems the related TPS3823-33 variant is recommended; for 3V systems use TPS3825-30. When designing with this device, ensure the MR pin has a defined logic state (tie high through a pull-up resistor if unused) and that the WDI service routine toggles within the watchdog window. Decouple VDD with a 0.1uF ceramic capacitor placed within 5 mm of the pin. This page synthesizes distributor stock, drop-in alternatives within the SOT-23-5 footprint, and design notes for supervisor selection that go beyond the manufacturer datasheet alone.
TPS3850G30QDRCRQ1 - 3.3V Window Supervisor w/ Watchdog Q1 | TI
The Texas Instruments TPS3850G30QDRCRQ1 is an automotive-grade, precision window voltage supervisor with a programmable window watchdog timer, integrating overvoltage (OV), undervoltage (UV), and watchdog monitoring in a single 10-pin VSON (DRC) package measuring 3 mm x 3 mm. The fixed 3.3 V sense threshold variant achieves 0.8% threshold accuracy over the full -40 C to +125 C automotive temperature range, with built-in hysteresis on both OV and UV comparators for tight-tolerance system designs. A window voltage supervisor is a power-rail monitoring IC that asserts a reset whenever the monitored supply falls outside a programmable overvoltage/undervoltage window, distinct from a simple single-threshold supervisor. Within the broader system hierarchy, the TPS3850G30QDRCRQ1 belongs to the supervisor and reset IC family, sitting under power management ICs in safety-critical electronics. It pairs an internal precision bandgap reference with a window comparator and a window watchdog timer (WDT), supporting the functional-safety demands of ISO 26262 ASIL-rated automotive ECUs. Key features include a single-channel open-drain reset output, programmable watchdog timeout via an external capacitor on the WT pin, programmable reset delay via an external capacitor on the DLY pin, integrated immunity to short transients on the SENSE line, and active-low watchdog input (WDI). The 10-VSON DR package's 3 mm x 3 mm footprint plus exposed thermal pad simplifies PCB layout in dense ECU designs and minimizes board area versus comparable SOT-23-style supervisors. The architecture uses a precision bandgap reference feeding two comparators that window the SENSE pin against VIT+ (OV) and VIT- (UV) thresholds, while an independent RC-controlled timer block creates the watchdog window for the WDT input. Auto-grade AEC-Q100 qualification and 0.8% threshold accuracy allow it to directly monitor tight-tolerance rails such as 3.3 V microcontrollers, CAN transceivers, and SoC core rails, where any supply excursion outside the safe window must trigger a deterministic reset rather than rely solely on internal MCU monitors. Typical applications include automotive ECU power supervision, ADAS controller rails, body and chassis modules, industrial PLC safety outputs, and redundant power-rail monitoring. The AEC-Q100 qualification also extends to electric-vehicle battery-management controllers where the supervisor must operate reliably across wide cold-crank and load-dump transients. When designing with this device, place the WT capacitor and the DLY capacitor as close as practical to their respective pins to avoid leakage paths that would shift timing accuracy. A 0.1 uF decoupling capacitor on VDD, plus a 1 M ohm resistor divider where adjustable thresholds are needed, is recommended for high-noise automotive environments. This page synthesizes AEC-Q100 status, drop-in watchdog supervisor alternatives, and practical automotive layout notes not found in the original TPS3850-Q1 datasheet alone.
TPS38700B01NRGER - I2C 12-Ch Sequencer + Watchdog | VQFN-24
The Texas Instruments TPS38700B01NRGER is an integrated multi-channel voltage sequencer with window watchdog and I2C programmability, delivered in a 24-pin 4 mm x 4 mm VQFN (RGE) package. It supports up to 12 sequencing channels, preprogrammed OTP defaults, and I2C control for flexible system-level power-tree management. The device is designed for systems that require precise power-up and/or power-down sequencing and can be interfaced with multi-channel voltage supervisors. A power-supply sequencer is a supervisory controller IC that orchestrates the order and timing in which multiple DC rails turn on and off. It belongs to the broader power-supply controller hierarchy: power-supply sequencer -> supervisor/monitor -> power management IC -> semiconductor. By replacing discrete RC delay chains and complex glue logic, the TPS38700B01NRGER reduces BOM count and PCB area while improving reliability through programmable fault response (retry, latch, ignore) and built-in watchdog supervision. Key features include OTP-programmable default thresholds and sequence timing for up to 12 channels, I2C-compatible interface for runtime adjustments, an integrated window watchdog timer, and dedicated fault outputs. The sequencer can interface directly with external voltage supervisors (such as the TPS3899 family) or onboard LDOs, with each channel capable of asserting enable signals and detecting under-voltage/over-voltage conditions via digital status flags. The internal architecture combines an OTP memory for default configuration, an I2C slave for host access, programmable timers for rail sequencing, and a window watchdog block that monitors host MCU activity. The 4x4 mm VQFN-24 package with exposed thermal pad supports compact PCB layouts typically found in dense compute, networking, and storage platforms. Typical applications include FPGA/processor multi-rail sequencing, server and storage platforms, networking switches, industrial PLC controllers, and any system where the host MCU, ASIC, or FPGA needs deterministic power sequencing plus watchdog supervision in a single chip. When designing with this part, plan the OTP defaults early because OTP is one-time programmable - verify sequence order, threshold voltages, and timing against the system power tree. Use the I2C interface only for runtime overrides of OTP defaults; do not rely on I2C as the sole configuration source if the system must power up without an active host. This page synthesizes distributor pricing for the TPS38700B01NRGER, drop-in alternative part numbers, and practical design notes not consolidated in the manufacturer datasheet.
TPS38700C03NRGERQ1 - Automotive 12-CH Sequencer + Watchdog QFN-24
The Texas Instruments TPS38700C03NRGERQ1 is an automotive-grade (AEC-Q100 qualified) multichannel power-supply sequencer with integrated window watchdog timer and I2C programmability, packaged in a 24-pin 4 mm x 4 mm VQFN (RGE) package. The device supervises up to 12 voltage rails and is designed for systems that require precise power-up and power-down sequencing of high-performance processors, FPGAs, ASICs, and SoCs. What is a power-supply sequencer? A power-supply sequencer is a controller IC that turns multiple voltage rails on and off in a defined order and timing rather than providing regulation itself. It sits between the system PMIC rails (or discrete regulators) and the digital load. The sequencer hierarchy is: voltage sequencer -> power management controller -> power management IC (PMIC) -> semiconductor. Sequencers are essential whenever downstream devices require a specific rail order for proper initialization (e.g., core before I/O before analog) or to prevent latch-up, inrush-induced brown-outs, or device damage during power transitions. Key features include support for up to 12 sequenced channels via an external cascade, OTP-default timing windows that load automatically on power-up, I2C-configurable threshold, delay, and watchdog timeout, and an integrated window watchdog for the host MCU. The device operates from a wide supply range and provides active-high enables to external regulators, along with a fault-output (nRST/WDO) that asserts when any monitored rail is out of tolerance or the watchdog window is violated. Architecturally, the TPS38700-Q1 combines a precision internal reference, twelve programmable threshold comparators via external resistor dividers, I2C control logic, and a window watchdog timer. The OTP banks store the default rail configuration and timing, so production boards boot deterministically even before firmware reprograms the device. The 24-pin VQFN (4x4) thermal pad delivers low junction-to-PCB thermal resistance, enabling high-channel-count designs on a compact footprint suitable for automotive ECU modules. Typical applications include automotive ADAS domain controllers, advanced driver-assistance ECUs, infotainment head units, zonal/zonal-architecture compute modules, and industrial multi-rail FPGA/ASIC platforms. The wide operating range and AEC-Q100 grade make it a strong fit for any high-reliability multi-rail board. When designing with this device, leave margin for OTP timing drift across temperature and validate the watchdog window against the slowest legitimate service routine. Cascade multiple TPS38700-Q1 parts when sequencing more than the local channel budget allows, tying their fault lines together so the system does not partial-power in a faulted state.
TPS38700C04NRGER - I2C 12-Ch Power Sequencer | Texas Instruments
The Texas Instruments TPS38700C04NRGER is a multichannel power-supply sequencer with I2C support, a window watchdog, and OTP-programmed defaults, integrating up to 12 sequence channels in a 24-pin VQFN (4x4 mm, RGE) package. It supports 1.6 V to 5.5 V supervision rails and is intended for systems requiring deterministic power-up and power-down ordering across multiple voltage rails. A power-supply sequencer is a supervisory power-management IC that enforces the order in which system rails turn on and off, preventing in-rush, latch-up, and signal contention in complex multi-rail SoCs, FPGAs, and processor designs. It belongs to the hierarchy: power-supply sequencer -> supervisor/monitor -> power management IC -> semiconductor. Sequencers differ from simple voltage supervisors in that they actively drive enable pins of downstream regulators in a timed sequence, rather than just asserting a reset signal once all rails are valid. Key features of the TPS38700C04NRGER include: up to 12 sequencing slots assignable via OTP or I2C, a programmable window watchdog with GPIO conversion, individual rail voltage monitoring with programmable thresholds, and an integrated 4-channel 8-bit ADC for margining or telemetry. The I2C interface (Fast/Standard mode, 100/400 kHz) allows in-system reprogramming of slot timing, watchdog timeout, and fault-handling behavior. Default sequencing is loaded from OTP at power-up so the device functions even before host software initializes. Architecturally, the TPS38700 uses a precision bandgap reference, per-channel programmable-threshold comparators, a 4-channel ADC for rail margining, and a sequencing state machine with non-volatile OTP memory. The internal EEPROM-style storage holds the default configuration (C04 variant), while I2C provides dynamic override of slot timing and watchdog windows. The 24-pin VQFN provides low thermal resistance for the modest power dissipation typical of supervisory ICs. Typical applications include sequencing of FPGA/SoC core, I/O, and auxiliary rails; ASIC and processor power-up coordination; telecom baseband power sequencing; and industrial control boards that require multi-rail coordination with fault response. The window watchdog and GPIO conversion simplify host-side fault handling. A key design consideration is OTP variant selection - the C04 suffix indicates a factory-programmed default sequence - so engineers must verify the C04 default matches their required rail order before committing the design to layout, and budget I2C lines if field reprogramming is required. This page synthesizes distributor pricing, drop-in alternative sequencing parts sharing the same 24-pin VQFN footprint, and practical design notes that are not consolidated in the manufacturer datasheet alone.
TPS389001DSET - 1.15V Supervisor, 6-WSON | Texas Instruments
The Texas Instruments TPS389001DSET is a precision, low-quiescent-current voltage supervisor in a 6-pin WSON (1.5x1.5 mm) package that monitors system rails as low as 1.15 V and asserts an open-drain RESET signal when the SENSE voltage falls below a preset threshold or when the manual reset (MR) pin is driven low. It operates from a 1.5 V to 5.5 V supply, draws only a few microamperes of quiescent current, and achieves 1% threshold accuracy across temperature, making it well suited to battery-powered and space-constrained designs. A voltage supervisor, also known as a reset IC or voltage monitor, is a type of power management integrated circuit that observes a system rail and generates a deterministic reset or interrupt when that rail drifts out of regulation. Supervisors sit within the broader power management hierarchy: voltage supervisor -> reset/monitor IC -> power management IC -> semiconductor. They are essential in any system where a microcontroller, SoC, or processor requires a clean, glitch-free reset signal during power-up, power-down, and brown-out events. The TPS3890 family specifically targets ultra-low-power monitoring with a user-programmable reset delay. Key features include a user-adjustable threshold (TPS389001 variant, factory-trimmed to roughly 1.0 V above VREF on the SENSE pin), a programmable reset delay set by an external capacitor on the CT pin, a manual reset (MR) input, and an open-drain active-low RESET output that supports wired-OR with other rails. The internal bandgap reference and trimmed comparator deliver 1% monitoring accuracy, while the typical quiescent current in the single-digit microampere range extends battery life in always-on applications. Architecturally, the TPS389001 uses a precision bandgap reference, a high-accuracy comparator, an adjustable delay block driven by CT, and a low-leakage open-drain FET output. The combination of hysteresis on the sense input and the programmable delay prevents false resets during brief transients, while the wide 1.5 V to 5.5 V supply range allows the device to be powered directly from the rail it monitors in many systems. Typical applications include IoT sensor nodes, wearables, portable medical monitors, e-metering, and any battery-powered MCU system that needs a robust power-on reset. The 6-WSON (1.5x1.5) footprint makes it one of the smallest supervisors in its class, ideal for high-density boards. When designing with this part, place the CT capacitor close to the CT pin to ensure accurate timing, and add a pull-up resistor (typically 10 kohm to 100 kohm) on the open-drain RESET output. Verify that the SENSE input is robust against inrush transients on the monitored rail. This page synthesizes distributor stock, drop-in alternatives in the same 6-WSON footprint, and practical design notes not found in the manufacturer datasheet.
TPS3897ADRYR - Single-Channel Adj Supervisor | Texas Instruments
The Texas Instruments TPS3897ADRYR is a single-channel, ultra-small adjustable voltage supervisor housed in a 6-pin USON (DRY) package measuring 1.45 mm x 1.0 mm. It monitors system voltages greater than 500 mV with 0.25% typical threshold accuracy and provides an active-high, open-drain reset output. The device operates across a 1.7 V to 6.5 V supply range and is qualified for -40C to +125C ambient operation. A voltage supervisor (also called a voltage monitor or reset IC) is a power-management device that observes a system rail and asserts a reset signal whenever the rail falls outside a programmable window. Supervisors sit between the upstream DC-DC converter and the downstream microcontroller/SoC, forming a critical layer in the power-tree hierarchy: PSU -> DC-DC converter -> voltage supervisor -> MCU/SoC core and I/O rails. The TPS3897 specifically belongs to TI's TPS389x sub-family of programmable-threshold monitors, distinguishing it from fixed-threshold supervisors such as the TPS3808 or TPS3831 series. Key features include an externally programmable threshold down to 500 mV, 1.0% maximum threshold accuracy over temperature, an adjustable reset delay set by an external capacitor on the CT pin, a logic enable input for output gating, and an ultra-low quiescent current of 1.5 uA typical. The device's small 6-pin USON footprint occupies less than 1.5 mm x 1.0 mm of board area, making it one of the smallest reset supervisors in TI's portfolio and ideal for space-constrained wearables and IoT nodes. Internally, the TPS3897 combines a precision bandgap reference, a low-offset comparator, and a programmable delay timer, all trimmed for low current draw and stable operation across industrial temperature ranges. The active-high open-drain output can be wire-ORed with other reset sources and pulled up to any rail up to 6.5 V, simplifying multi-supply sequencing. The 1% accurate threshold ensures reliable boot-time decisions on processors with tight Vcore tolerances. Typical applications include wearables, IoT sensor nodes, portable medical monitors, microcontroller reset supervisors, and battery-powered industrial endpoints. The same device also fits factory automation controllers and point-of-sale terminals that need a compact, accurate rail monitor. When designing with this part, place the CT delay capacitor within 5 mm of the CT pin and keep the SENSE input trace short and away from switching noise. The open-drain RESET output requires an external pull-up resistor to a valid logic rail; do not leave it floating. This page synthesizes verified distributor stock data, parametric drop-in alternatives in the same USON-6 footprint, and practical PCB/thermal/design notes that go beyond the manufacturer's datasheet, helping engineers select and source the TPS3897ADRYR with confidence.
TPS40077PWP - 28V Sync Buck Controller w/ VFF | Texas Instruments
The Texas Instruments TPS40077PWP is a 4.5-V to 28-V synchronous buck (step-down) DC-DC controller with voltage feed-forward, housed in a 16-pin HTSSOP (PWP) PowerPAD package with an exposed thermal pad. It uses voltage-mode control and drives external N-channel MOSFETs (one high-side, one low-side) with TI's second-generation drive technology, enabling high-efficiency conversion up to a programmable 1 MHz switching frequency. A buck controller (step-down DC-DC controller) is a power-management IC that regulates an output voltage lower than its input by chopping the input with one or more switches and averaging the result with an LC filter. The TPS40077PWP belongs to the wider family of DC-DC switching controllers, which sit one tier above the more familiar point-of-load converters and below the broad category of power management ICs used in distributed power architectures. Key features include a wide 4.5-V to 28-V input range that targets industrial, telecom and 12-V/24-V bus rails, programmable operating frequency up to 1 MHz, programmable soft-start, under-voltage lockout (UVLO), and high-side FET-sensed short-circuit protection. The HTSSOP-16 PowerPAD package provides a low thermal resistance of approximately 32 C/W (theta_JA) so the controller can deliver tens of amps when used with appropriately sized external MOSFETs. The TPS40077 uses a voltage-mode control architecture with input voltage feed-forward, which keeps the loop gain and bandwidth relatively constant across the full 4.5-V to 28-V input range - useful when the source is a varying 12-V/24-V bus or a battery whose voltage changes with state of charge. Internal bootstrap and adaptive dead-time drive circuitry simplify gate-drive design and minimize body-diode conduction losses across the low-side switch. Typical applications include telecom and networking equipment (typically 24-V or 12-V distributed bus), industrial point-of-load regulation from 24-V supplies, high-current single-rail POL converters for FPGAs/ASICs, and battery-powered systems where the input voltage varies over a wide range. The 1 MHz switching frequency allows smaller inductors and capacitors in space-constrained designs. When designing with this device, choose the inductor based on ripple current (~20-30% of IOUT), select low-RDS(on) N-MOSFETs with adequate SOA for the high-side switch, and lay out the switching-node loop as compactly as possible. Always connect the PowerPAD to a sufficient copper pour on the top layer for thermal dissipation, since the controller itself carries the gate-drive losses but does not switch load current directly. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an at-a-glance reference for board bring-up and BOM risk management.
TPS40170QRGYRQ1 - 60V Sync Buck Controller, AEC-Q100 | Texas Instruments
The Texas Instruments TPS40170QRGYRQ1 is an automotive-qualified synchronous PWM buck controller that operates from a 4.5V to 60V wide-input range and drives external MOSFETs in a 20-pin VQFN (RGY) package measuring 3.5 mm x 4.5 mm. It offers an adjustable switching frequency range of 100 kHz to 600 kHz, supports output voltages as low as 0.6V (with 1% reference accuracy) and as high as 57V, and provides an external MOSFET gate drive for synchronous rectification that yields high efficiency across the full automotive load range. A buck controller (as opposed to a fully integrated buck regulator) is a DC-DC switching controller that uses external power MOSFETs to deliver load currents far beyond what a small integrated regulator can supply. The TPS40170QRGYRQ1 sits in the synchronous-buck-controller family of TI's power-management portfolio, between low-current LDO regulators and fully integrated buck converters; designers choose it when output current (up to 20A depending on MOSFET selection) or thermal headroom requires splitting the power stage from the control IC. Synchronous rectification replaces the Schottky freewheel diode with a low-side MOSFET, cutting conduction loss roughly in half versus asynchronous buck. Key features include an ENABLE pin for low-IQ shutdown (1 uA typical), pre-biased output support for safe start-up into pre-charged loads, an open-drain PGOOD signal for sequencing, closed-loop soft-start, output-voltage tracking, adaptive dead-time control, and 1% output voltage accuracy. The RGY package exposes a thermal pad (theta_JA around 35 C/W on a 4-layer JEDEC board) so the controller itself stays cool while the external MOSFETs handle bulk losses. Typical applications span automotive infotainment, ADAS sensor rails, body electronics, and industrial 24V/48V bus converters where wide input range is mandatory. Designers typically pair it with CSD18531Q5A NexFET power MOSFETs and a TPS3702 window supervisor for fault handling. Order today from XAIPART with full traceability and immediate shipping on qualified orders.
TPS40170RGYR - 60V Sync Buck PWM Controller VQFN-20 | TI
The Texas Instruments TPS40170RGYR is a 4.5V to 60V wide-input synchronous PWM buck controller housed in a 20-pin VQFN (RGY) package measuring 3.5 mm x 4.5 mm. It drives external high-side and low-side N-channel MOSFETs to deliver point-of-load conversion with output current set by the inductor and FETs (no internal switch - controller topology). A buck controller is a switch-mode power supply (SMPS) controller that drives external MOSFETs to step down a higher DC input voltage to a lower regulated DC output voltage. The synchronous variant replaces the traditional Schottky catch diode with a low-side MOSFET, substantially improving efficiency at heavy loads and shrinking power dissipation. Buck controllers sit in the broader power management hierarchy of voltage regulators alongside LDOs, boost converters, and SEPIC/Cuk topologies. They are the topology of choice when VIN-VOUT headroom is large or efficiency must exceed what a linear regulator can deliver. Key features include a 4.5V to 60V operating input range, 0.6V to 57V adjustable output voltage range, programmable switching frequency up to 600 kHz, 1.2A peak gate-drive output current, internal 4.5V LDO bias supply, adaptive dead-time control, and internal bootstrap diode. The TPS40170RGYR also integrates overcurrent protection (HICCUP), undervoltage lockout (UVLO), thermal shutdown, and a PGOOD indicator for sequencing. The TPS40170 uses TI's voltage-mode control architecture with a precision internal reference and external compensation network, providing stable loop response across a wide range of operating conditions. The integrated high-side bootstrap diode simplifies PCB layout by eliminating an external discrete component, while adaptive dead-time control prevents shoot-through current between the high-side and low-side FETs during switching transitions. Typical applications include industrial 24V/48V bus point-of-load converters, telecommunications and networking equipment, automotive infotainment and cluster power, battery-powered systems with wide input ranges (e.g., 12V, 24V, 36V, 48V rails), test and measurement instruments, distributed power systems, and general-purpose step-down DC-DC conversion where high efficiency and compact form factor are required. When designing with the TPS40170RGYR, ensure the input capacitor (X7R, low ESR, placed close to the high-side FET drain) and bootstrap capacitor are properly sized. The RT resistor sets switching frequency, and the compensation network (RC around the COMP pin) must be tailored to the chosen inductor and output capacitor - default compensation values from the datasheet typical application circuit should be validated on the bench. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
TPS40171RGYR - 60V Wide-Input Sync Buck Controller | Texas Instruments
The Texas Instruments TPS40171RGYR is a 4.5-V to 60-V wide-input synchronous PWM buck controller in a 20-pin VQFN (RGY) package with exposed thermal pad, designed for non-isolated point-of-load (POL) DC-DC conversion in industrial, telecom, and automotive systems. It supports output voltages as low as 0.6 V with internal reference, drives external N-channel high-side and synchronous low-side MOSFETs, and operates at a programmable switching frequency between 100 kHz and 600 kHz selected by RT/SS resistor. A buck controller is a type of switching-mode DC-DC controller that regulates a lower output voltage from a higher input voltage using an inductor as the energy-storage element. Within the power management hierarchy, it sits between a DC-DC converter and a switching regulator; the term "controller" specifically denotes that the device only provides gate-drive signals and does not include the power MOSFETs internally, allowing the designer to size external switches for the application current. Synchronous buck controllers replace the traditional diode with a low-side MOSFET to achieve higher efficiency, particularly at high load currents. Key features include 4.5-V to 60-V input range, 0.6-V to ~0.85*VIN adjustable output, programmable current-mode control with internal slope compensation, selectable between voltage-mode (VMC) and average-current-mode (ACM) control architectures, and a precision enable input with adjustable undervoltage lockout. The TPS40171 also integrates programmable soft-start, cycle-by-cycle current limiting, hiccup overload protection, and a power-good indicator for supply sequencing. Thermal performance is rated for a junction-to-ambient resistance of approximately 35 C/W on a standard JEDEC 4-layer board. Architecturally, the TPS40171 uses peak current-mode control with an internal transconductance error amplifier, providing excellent line rejection and simplified loop compensation. The MODE pin selects between voltage-mode (D-CAP-style) and current-mode operation; current-mode offers better transient response and paralleled-rail capability. Internal logic-level translation enables 100% duty-cycle operation for cold-crank survival in 12-V automotive systems. The TPS40171 is the higher-frequency (up to 600 kHz) sibling of the TPS40170 (up to 300 kHz), allowing the use of smaller external inductors and capacitors where efficiency trade-offs are acceptable. Typical applications include industrial 24-V and 48-V distributed-bus point-of-load regulators, telecom base-station intermediate bus converters, 12-V automotive infotainment and body-electronics rails, battery-powered test and measurement equipment, and any POL supply requiring high step-down ratios with high efficiency. The wide input range also supports USB-PD and e-mobility auxiliary rails. When designing with this device, choose the TPS40170 (300 kHz max) variant when lower switching loss in large power stages is critical, and choose TPS40171 when smaller magnetics and faster transient response are required. Always size the bootstrap capacitor for the high-side gate drive and place the input bypass capacitors as close as possible to the power-stage switching node to minimize parasitic ringing. According to the TI datasheet, the maximum operating junction temperature is +125 C and the part is rated for -40 C to +125 C ambient operation. This page synthesizes distributor pricing, drop-in alternatives within the same VQFN-20 footprint, and practical design notes not found in the manufacturer datasheet.
TPS4H000-Q1 - 40V 1Ω Quad High-Side Switch | TI Automotive
The TPS4H000-Q1 is a fully protected quad-channel smart high-side switch from Texas Instruments, integrating four 1000-mΩ NMOS power FETs with an internal charge pump. Designed for automotive and industrial applications, it operates from a 3.4V to 40V supply and delivers up to 750mA per channel. The device features full diagnostics, high-accuracy current sensing, and an external adjustable current limit, enabling intelligent load control and system protection. A smart high-side switch is a power management IC that connects a load to a positive supply rail through a MOSFET, providing protection and diagnostic functions. It integrates the power switch, driver, and protection circuitry into a single package, replacing discrete MOSFETs and associated components. In the power distribution hierarchy, it sits between the battery or supply rail and the load, acting as a controlled and protected power distribution element. Key features include a wide operating voltage range of 3.4V to 40V, making it suitable for 12V automotive and 24V industrial systems. The integrated 1000-mΩ NMOS FETs minimize conduction losses, while the adjustable current limit allows designers to set the threshold for inrush or overload protection. Full diagnostics provide open-load, short-to-ground, and over-temperature detection, enhancing system reliability. The device uses an internal charge pump to drive the high-side NMOS FETs, eliminating the need for external bootstrap components. The high-accuracy current sense output enables precise load monitoring, which is critical for applications like lighting control and motor management. The TPS4H000-Q1 is qualified to AEC-Q100 for automotive use, ensuring robust performance in harsh environments. Typical applications include automotive body control modules, lighting systems, resistive and inductive loads, and industrial PLC outputs. Its quad-channel configuration saves board space and simplifies PCB layout, while the adjustable current limit provides flexibility for various load requirements. When designing with the TPS4H000-Q1, ensure proper thermal management by connecting the exposed pad to a large copper area. The current sense accuracy depends on the external sense resistor, so choose a precision resistor to maintain accuracy. Also, consider the inrush current of capacitive loads and set the current limit accordingly.
TPS4H000AQPWPRQ1 - 40V Quad Smart High-Side Switch | TI
The Texas Instruments TPS4H000AQPWPRQ1 is a 40-V, 4-channel automotive smart high-side switch with integrated 1000-mΩ NMOS power FETs, an internal charge pump, and an adjustable current limit, housed in a 20-pin HTSSOP (PWP) power-pad package. A smart high-side switch is a power distribution switch placed between a supply rail and a load, switching the high side of the load while integrating protection, diagnostics, and current monitoring into a single IC. Within the power management hierarchy, it belongs to the load switch / power distribution switch family, which sits upstream of discrete MOSFET drivers and replaces discrete fuse-plus-relay solutions in modern automotive and industrial systems. Key features include four independent channels with integrated 1000-mΩ NMOS power FETs, an external adjustable current limit that controls inrush and overload current, high-accuracy current-sense output for intelligent load monitoring, and full diagnostics reporting such as open-load and fault conditions. The device integrates an internal charge pump so the NMOS switches are driven properly from a single supply, eliminating the need for external driver circuitry. Technically, the TPS4H000-Q1 family is a fully protected quad-channel smart high-side switch. Protection functions combine with per-channel diagnostics to allow the microcontroller to detect fault conditions in real time. The two family versions differ in diagnostic reporting format, allowing designers to select the version matching their ADC or polling architecture. Automotive qualification (Q1) makes the device suitable for harsh 12-V and 24-V vehicle environments. Typical applications include automotive LED lighting modules, resistive and inductive load drivers such as relays, heaters and solenoids, body control modules, and general 12-V/24-V automotive load management. The quad-channel integration reduces board area versus four discrete single-channel switches. A key design consideration is power dissipation: at 1000-mΩ per channel on-resistance, conduction losses scale with load current, so thermal design of the exposed power pad on the PCB is important at continuous high currents. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Pricing shown as of 2026-09-03.
TPS4H000BQPWPRQ1 - 40V 4-Ch Smart High-Side Switch | TI
The Texas Instruments TPS4H000BQPWPRQ1 is a 40-V, quad-channel automotive smart high-side power switch with integrated 1000-mOhm NMOS power FETs, housed in a 20-pin HTSSOP (PWP) package with exposed thermal pad. It is AEC-Q100 qualified for automotive applications and provides per-channel adjustable current limiting, high-accuracy current sensing, and full diagnostic reporting. A smart high-side switch is a power distribution switch, part of the load driver and power-management IC hierarchy, that sits between a supply rail and a load, switching the high side of the load while integrating protection and telemetry. Unlike a discrete MOSFET plus driver solution, a smart high-side switch integrates the power FET, gate drive, charge pump, current-sense amplifier, and protection circuits in a single surface-mount device, reducing BOM count and board area. Key differentiating features of the TPS4H000-Q1 family include the external adjustable current limit, which improves system reliability by limiting inrush or overload current; high-accuracy current-sense output for intelligent load control and predictive maintenance; open-load, short-circuit, and thermal fault diagnostics; and a wide 3.4-V to 40-V supply range that tolerates automotive load-dump transients on 12-V rails. Architecturally, each of the four channels uses an integrated NMOS power transistor switched by an internal charge pump, so no external FET drive components are required. The four channels can be controlled independently through IN1-IN4 inputs, with SEL and CS pins providing multiplexed diagnostic and current-sense readout to a microcontroller ADC. The B-grade variant offers the family's specified current-limit characteristics in the automotive temperature range. Typical applications include automotive body-control modules driving relays, lamps, and LED loads; 12-V and 24-V industrial PLC digital output modules; and heating elements or solenoid loads in modules where per-channel fault reporting is mandatory. The 40-V rating covers jump-start and load-dump conditions. Design consideration: because each channel has 1000 mOhm on-resistance, conduction losses are P = I^2 x R; keep per-channel continuous current near the 750-mA rating to limit junction temperature rise, and use the exposed pad soldered to a copper pour for heat spreading. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS4H160AQPWPRQ1 - 40V Quad-Channel Smart High-Side Switch | TI
The Texas Instruments TPS4H160AQPWPRQ1 is a 40-V, 160-mΩ, quad-channel automotive smart high-side switch with adjustable current limit, housed in a 28-pin HTSSOP (PWP) package with PowerPAD. It integrates four N-channel MOSFET power FETs and an internal charge pump to drive the high-side switches, delivering up to 2.5 A continuous current per channel for resistive, inductive, and capacitive loads in 12-V automotive body-electronics systems. A smart high-side switch (a power-distribution switch used to drive ground-referenced loads from the positive supply rail) sits hierarchically above simple MOSFETs and below multi-channel power-management ICs in modern automotive electronic control units. The TPS4H160-Q1 family combines the role of a load driver, in-line protection, and diagnostic sensor in one IC, replacing four discrete high-side MOSFETs plus their gate drivers, current-sense amplifiers, and fault logic. Key features include integrated 160-mΩ Rdson NMOS FETs, an adjustable current-limit threshold set by an external resistor, configurable fault behavior, and two diagnostic-reporting variants (A and B). Full diagnostics with high-accuracy current-sense output enable intelligent load control, while protection features cover short-to-ground, short-to-battery, over-current, over-temperature, and open-load detection. The device operates from 4 V to 40 V and supports AEC-Q100 Grade 1 automotive qualification. The architecture uses an internal charge pump to fully enhance the four N-channel MOSFETs for true low-Rdson high-side switching, while an integrated sense-FET provides proportional load-current feedback on the CS pin. Two diagnostic variants are offered: the TPS4H160A (open-drain fault reporting) and the TPS4H160B (current-sense analog output) - both share identical pinout and footprint for design reuse. Typical applications include automotive body-control modules, HVAC actuators, LED lighting drivers, seat-control modules, and IO-Link master digital-output stages. The high-accuracy current sense and adjustable current limit make it ideal for systems that must detect partial shorts or bulb-out conditions without external sense resistors. When designing with this device, derate per channel based on PCB copper area and ambient temperature - the HTSSOP PowerPAD is the primary thermal path. Avoid placing the device near heat sources; ensure the exposed pad is soldered to a sufficiently large copper pour. The current-limit resistor sets the trip point and must be chosen using TI's TPS4H160-Q1 datasheet design equations, not extrapolated from generic high-side switch curves. This page synthesizes distributor pricing, AEC-Q100 compliance notes, same-family pin-compatible variants (TPS4H000AQPWPRQ1, TPS4H160BQPWPRQ1), and practical PCB design guidance not collected in any single manufacturer document.
TPS51200DRCR - 3A Sink/Source DDR Termination Regulator | Texas Instruments
The Texas Instruments TPS51200DRCR is a 3 A sink and source double data rate (DDR) termination regulator housed in a compact 10-pin VSON (3x3 mm) package, with integrated buffered VTTREF reference and remote sensing for DDR, DDR2, DDR3, DDR3L, and DDR4 memory power rails. The push-pull LDO output stage sources and sinks up to 3 A continuously while tracking VDDQ/2, and the part accepts an input voltage of 0.3 V to 6 V while regulating a minimum 20 uF output capacitance. A DDR termination regulator is a specialized power management IC that generates the VTT termination rail for DDR memory buses. Because DDR memory address, command, and data lines require mid-rail termination to VDDQ/2, the VTT supply must both source and sink current depending on bus activity. The TPS51200 belongs to the special-purpose regulator class within the broader power management IC hierarchy (LDO -> linear regulator -> voltage regulator -> PMIC -> termination regulator), bridging general-purpose LDOs and full switching converters in mobile, server, and consumer memory subsystems. Key features include a 3 A sink/source capability, an integrated VTTREF buffered reference that tracks REFIN/2, support for REFIN from 0.5 V to 1.8 V (covering DDR1 through DDR4), remote sensing at the VO pin for accurate regulation at the load, soft-start control with the PGOOD comparator output, and a minimum 20 uF ceramic output capacitance. The 10-pin VSON (DRC) 3x3 mm package with thermal pad provides adequate heat dissipation while enabling compact memory sub-system layouts. The device uses a linear push-pull (sourcing NMOS / sinking PMOS) output stage controlled by an internal transconductance error amplifier referenced to VTTREF/2, with built-in current limit and thermal shutdown. The buffered VTTREF output simplifies memory controller reference routing, and the SENSE pin allows Kelvin sensing directly at the DDR termination point to compensate PCB IR drops in high-current memory channels. Typical applications include DDR memory termination in notebooks, desktops, servers, telecom/datacom line cards, GSM base stations, LCD-TV/PDP-TV, copiers/printers, and set-top boxes. The wide DDR-family support makes it a single solution for designs targeting multiple memory standards. Design tip: place the minimum 20 uF ceramic output capacitor as close as possible to the VO pin to minimize parasitic inductance, route the SENSE line as a Kelvin trace directly to the memory termination point, and tie VTTREF to the memory controller reference input within 10 mm to avoid reference drift. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical layout guidance not collected on the TI product page, optimized for engineers selecting a DDR termination LDO for new designs and for cross-replacing the part on existing boards.
TPS51200QDRCRQ1 - 3A DDR Termination Regulator | TI | Automotive AEC-Q100
The Texas Instruments TPS51200QDRCRQ1 is an automotive-grade sink and source DDR termination regulator designed for low input voltage, low-cost, low-noise systems where board space is a key consideration. It comes in a 10-pin VSON (3x3 mm) package with exposed thermal pad and requires a minimum output capacitance of only 20 uF while maintaining fast transient response. A DDR termination regulator (VTT regulator) is a specialized linear regulator that powers the termination rail of DDR memory buses. Unlike a standard LDO, it must both source and sink current to hold the termination voltage at VDDQ/2 during bus transitions, which is essential for signal integrity on DDR2, DDR3, DDR3L, and DDR4 interfaces. It sits within the memory power-management hierarchy alongside switching regulators and reference generators. Key features include a 2.5V to 6.5V input range, VTT output tracking of VTTREF within +/-25 mV for both DC and AC conditions, continuous sink/source current of +/-2 A with 3 A peak capability, remote sensing to compensate PCB trace drops, and an integrated VLDO output for VTTREF generation. AEC-Q100 qualification covers -40C to +105C operation for automotive environments. Architecturally, the TPS51200-Q1 uses a high-bandwidth sink/source amplifier with a precision reference, giving excellent load and line regulation with minimal external components. The enable pin supports power sequencing (S3/S5 support), and the soft-start limits inrush current at startup. Typical applications include DDR memory termination in automotive infotainment, ADAS domains, telematics ECUs, and industrial/networking equipment using DDR memory. Design tip: place input and output ceramic capacitors close to the pins, connect the exposed pad to a generous copper area for thermal dissipation, and drive the EN pin from a sequenced logic rail for multi-rail systems. Pricing data as of 2026-08-29.