Texas Instruments TPS746135PQWDRBRQ1

Overview

TPS746135PQWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 1A ultra-low-dropout linear regulator with power-good (PG) output, fixed 1.35V output, 2mm × 2mm wettable-flank WSON-6 package, ±1.5% output accuracy over –40°C to +150°C, and 265mV max dropout at 1A - designed for post-regulation in automotive infotainment and ADAS power rails.

For engineers reviewing the TPS746135PQWDRBRQ1 datasheet, TPS746135PQWDRBRQ1 pinout, TPS746135PQWDRBRQ1 application, or TPS746135PQWDRBRQ1 equivalent, key selection criteria include its wettable-flank optical inspection capability, push-pull or open-drain PG configuration, 25μA typical quiescent current, stability with ≥1µF ceramic output capacitance, and functional safety documentation support.

Technical Context

The TPS746135PQWDRBRQ1 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 UVLO (1.21–1.47V rising threshold) prevents erratic startup under low-input conditions.

This device supports both fixed-output and adjustable configurations; the TPS746135PQWDRBRQ1 variant is factory-set to 1.35V and uses the 6-pin DRV (WSON) package with thermal pad connected to GND. Power-good monitoring occurs at the feedback node, with programmable thresholds (92% VOUT rising, 90% VOUT falling) and configurable delay timing.

Key Specifications

Pinout & Package

TPS746135PQWDRBRQ1 is housed in a 6-pin, 2mm × 2mm wettable-flank WSON package (DRV) with exposed thermal pad electrically tied to GND. The wettable flanks enable automated optical inspection (AOI) of solder joints - essential for automotive manufacturing traceability and reliability assurance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS74612PQWDRBRQ1, the TPS746135PQWDRBRQ1 provides 135mV higher output for improved noise margin in 1.35V I/O interfaces; compared with TPS7B8733QKVURQ1, it offers smaller size and lower IQ but at reduced current capability - making it optimal for space-constrained, low-power 1.35V domains.

Availability

TPS746135PQWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, camera modules, and cluster displays requiring stable component supply with AEC-Q100 compliance and long-term production support.

Supply support for TPS746135PQWDRBRQ1 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad automotive, industrial, and personal electronics portfolios.

The TPS746-Q1 product line delivers automotive-grade LDOs optimized for post-regulation in ADAS, infotainment, and body electronics - emphasizing ultra-low dropout, low noise, functional safety readiness, and manufacturability via wettable-flank packages.

FAQ

What is the output voltage tolerance of the TPS746135PQWDRBRQ1 over temperature?

The TPS746135PQWDRBRQ1 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 voltage domains where tight regulation is required for logic compatibility and analog performance.

Does the TPS746135PQWDRBRQ1 require an external feedback resistor network?

No - the TPS746135PQWDRBRQ1 is a fixed-output variant set to 1.35V at the factory. Pin 2 (FB) is internally connected and not user-accessible; it must be left floating or grounded per TI layout recommendations. No external resistors are needed, simplifying design and reducing BOM cost.

Can the TPS746135PQWDRBRQ1 be used with a 1µF output capacitor?

Yes - the TPS746135PQWDRBRQ1 is explicitly characterized and guaranteed stable with a minimum 1µF ceramic output capacitor. This enables compact, low-ESR filtering without requiring larger or more expensive capacitor types, supporting miniaturized automotive module designs.

What is the purpose of the wettable flank feature in the TPS746135PQWDRBRQ1 package?

The wettable flanks on the TPS746135PQWDRBRQ1's 2mm × 2mm WSON-6 package allow automated optical inspection (AOI) of solder joint quality during SMT assembly. This is mandated for automotive production to ensure zero-defect interconnect reliability and traceability in safety-critical systems.

How does the power-good (PG) output function in the TPS746135PQWDRBRQ1?

The TPS746135PQWDRBRQ1's PG output asserts high (push-pull) or pulls low (open-drain) when VOUT reaches ≥92% of 1.35V and remains asserted until VOUT falls below 90%. It provides precise sequencing feedback for MCUs or PMICs, with configurable delay timing and no external pull-up required in push-pull mode.