Texas Instruments TPS74629PQWDRVRQ1

Overview

TPS74629PQWDRVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 1A ultra-low-dropout regulator (LDO) with power-good output, fixed 2.9V output, and wettable-flank 6-pin WSON package (2mm × 2mm). It operates from 1.5V to 6.0V input, delivers ±1.5% output accuracy over –40°C to +150°C, achieves 265mV max dropout at 1A (3.3VOUT), and supports fast load transient response in ADAS camera power rails.

For engineers reviewing the TPS74629PQWDRVRQ1 datasheet, TPS74629PQWDRVRQ1 pinout, TPS74629PQWDRVRQ1 application, or TPS74629PQWDRVRQ1 equivalent, key selection criteria include its wettable-flank WSON-6 package for optical solder inspection, open-drain or push-pull PG output for supply sequencing, 25μA typical quiescent current, stability with ≥1µF ceramic output capacitor, and functional safety documentation support.

Technical Context

The TPS74629PQWDRVRQ1 implements a precision band-gap reference and error amplifier to achieve ±0.85% typical output accuracy at 25°C and ±1.5% over full temperature range. Its internal foldback current limit reduces thermal dissipation during short-circuit events, while integrated thermal shutdown (170°C trip), UVLO (1.21–1.47V rising threshold), and active output discharge enhance system reliability.

This LDO supports both fixed-output (2.9V) and adjustable configurations via FB pin; the TPS74629PQWDRVRQ1 variant is fixed 2.9V. Power-good monitoring uses 92% VOUT high threshold and 90% VOUT low threshold with 2% hysteresis, enabling robust rail validation in multi-supply automotive systems.

Key Specifications

Pinout & Package

TPS74629PQWDRVRQ1 is housed in a 6-pin wettable flank WSON package (2mm × 2mm), optimized for automated optical inspection (AOI) of solder joints. The exposed thermal pad is electrically connected to GND and must be soldered to the PCB ground plane for optimal thermal performance (R_θJA = 80.3°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS74628PQWDRVRQ1, the TPS74629PQWDRVRQ1 provides 100mV higher output for improved noise margin in 2.9V-specified image sensors; compared with TPS74633PQWDRBRQ1, it offers smaller footprint and AOI-ready wettable flanks but higher thermal resistance - ideal for space-constrained camera modules.

Availability

TPS74629PQWDRVRQ1 is available at Aetrix Electronics and suitable for automotive front cameras, digital cluster displays, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS74629PQWDRVRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management solutions, with decades of automotive qualification expertise.

The TPS746-Q1 product line delivers AEC-Q100 qualified, functional-safety-capable LDOs for ADAS, infotainment, and body electronics - designed to meet stringent automotive reliability, thermal, and diagnostic requirements.

FAQ

What is the output voltage tolerance of the TPS74629PQWDRVRQ1 over temperature?

The TPS74629PQWDRVRQ1 guarantees ±1.5% maximum output voltage accuracy across its full operating junction temperature range of –40°C to +150°C. At 25°C, typical accuracy is ±0.85%, making it suitable for precision analog and imaging applications where rail stability directly impacts signal fidelity.

Does the TPS74629PQWDRVRQ1 require external feedback resistors?

No - the TPS74629PQWDRVRQ1 is a fixed-output variant set to 2.9V. Its FB pin is internally connected and must be left floating per the datasheet; no external resistors are needed, reducing BOM count and layout complexity versus adjustable LDOs.

Can the TPS74629PQWDRVRQ1 be used with a 1µF output capacitor?

Yes - the TPS74629PQWDRVRQ1 is explicitly characterized and stable with a minimum 1µF ceramic output capacitor. This enables compact, low-cost designs without requiring larger or specialized low-ESR capacitors typically needed by older LDO architectures.

What is the purpose of the wettable flank feature in the TPS74629PQWDRVRQ1 package?

The wettable flank design on the TPS74629PQWDRVRQ1's WSON-6 package exposes solderable sidewalls, enabling automated optical inspection (AOI) of solder joint quality. This is mandatory for zero-defect automotive manufacturing and improves field reliability in vibration-prone environments.

How does the power-good (PG) output function in the TPS74629PQWDRVRQ1?

The TPS74629PQWDRVRQ1 PG output asserts high (open-drain pulled up or push-pull driven) when VOUT reaches 92% of 2.9V and deasserts at 90%, with 2% hysteresis. This enables safe sequencing of downstream logic and provides real-time rail health monitoring in automotive ECUs.