Texas Instruments TPS74611PQWDRBRQ1

Overview

TPS74611PQWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 1A ultra-low-dropout linear regulator with power-good (PG) output, fixed 1.1V output, 2mm × 2mm wettable-flank WSON-6 package, ±1.5% output accuracy over –40°C to +150°C, and 265mV max dropout at 1A (3.3V_OUT). It powers critical subsystems in automotive head units and ADAS cameras where stable low-noise biasing and supply sequencing are required.

For engineers reviewing the TPS74611PQWDRBRQ1 datasheet, TPS74611PQWDRBRQ1 pinout, TPS74611PQWDRBRQ1 application, or TPS74611PQWDRBRQ1 equivalent, key selection criteria include its wettable-flank package for automated optical inspection, integrated thermal shutdown and foldback current limit, push-pull PG option (enabled for V_OUT ≥ 1.0V), and stability with ≥1µF ceramic output capacitance.

Technical Context

The TPS74611PQWDRBRQ1 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 UVLO (1.21–1.47V rising threshold) prevents erratic startup under brownout conditions.

It supports system-level power sequencing via EN input and PG output - the PG pin asserts high (push-pull) when V_OUT reaches 92% of nominal and deasserts at 90%, with 2% hysteresis. The device operates across 1.5V–6.0V input and delivers regulated 1.1V output with 38dB PSRR at 100kHz and 53dB at 1kHz.

Key Specifications

Pinout & Package

TPS74611PQWDRBRQ1 uses the DRV (Wettable flank WSON-6) package: 2mm × 2mm body, 0.5mm pitch, exposed thermal pad electrically connected to GND. Thermal pad must be soldered to PCB ground plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS74611PQWDRBRQ1, the 1.2V variant offers direct voltage substitution in compatible designs, while the TPS7B8733QKVURQ1 trades current capacity for ultra-low quiescent power - making it suitable only for non-core, low-load applications.

Availability

TPS74611PQWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS camera modules, and digital cluster displays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS74611PQWDRBRQ1 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 delivering analog and embedded processing solutions, with deep expertise in automotive-grade power management ICs.

The TPS746-Q1 product line is engineered specifically for automotive infotainment and ADAS subsystems, emphasizing AEC-Q100 compliance, wettable-flank packaging for process reliability, and integrated sequencing features for complex multi-rail systems.

FAQ

What is the output voltage tolerance of the TPS74611PQWDRBRQ1 over temperature?

The TPS74611PQWDRBRQ1 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%. This tight tolerance ensures reliable operation of 1.1V-sensitive loads such as processor I/O banks and high-speed SerDes interfaces without requiring external calibration.

Does the TPS74611PQWDRBRQ1 require an external pull-up resistor on the PG pin?

No - the TPS74611PQWDRBRQ1 uses a push-pull PG output configuration, which actively drives high or low without needing an external pull-up resistor. This simplifies schematic design and reduces BOM count compared to open-drain alternatives. The PG pin asserts high when V_OUT reaches 92% of 1.1V and pulls low below 90%, with 2% hysteresis.

Can the TPS74611PQWDRBRQ1 operate with a 1.5V input supply?

Yes - the TPS74611PQWDRBRQ1 supports input voltages from 1.5V to 6.0V. However, with a 1.5V input and 1.1V output, the effective dropout is 400mV, exceeding the 265mV max specified at 1A. Output current capability will be derated accordingly, and thermal performance must be verified using R_θJA = 80.3°C/W and power dissipation calculations.

Is the TPS74611PQWDRBRQ1 compatible with standard reflow profiles for lead-free assembly?

Yes - the TPS74611PQWDRBRQ1 in the DRV (WSON-6) package is qualified for standard IPC/JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C. Its wettable flank design supports automated optical inspection of solder fillets post-reflow, ensuring joint integrity in high-reliability automotive production.

How does the TPS74611PQWDRBRQ1 handle short-circuit conditions?

The TPS74611PQWDRBRQ1 employs internal foldback current limiting: during a short circuit, output current decreases as V_OUT drops, reducing power dissipation and thermal stress. Combined with thermal shutdown (trip at 170°C, reset at 155°C) and UVLO, this protects both the LDO and downstream circuitry without requiring external protection components.