Texas Instruments TPS74515PQWDRBRQ1

Overview

TPS74515PQWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade 500-mA ultra-low-dropout linear regulator with power-good (PG) output, fixed 1.5-V output, 2-mm × 2-mm wettable-flank WSON-6 package, and ±0.85% output accuracy at 25°C. It operates from 1.5 V to 6.0 V input, delivers 160 mV max dropout at 500 mA (3.3 VOUT), and supports optical solder-joint inspection for high-reliability automotive power rails.

For engineers reviewing the TPS74515PQWDRBRQ1 datasheet, TPS74515PQWDRBRQ1 pinout, TPS74515PQWDRBRQ1 application, or TPS74515PQWDRBRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed thermal performance (RθJA = 80.3°C/W), real-world automotive use cases, and two functionally comparable alternatives with documented differences in PG topology and output adjustability.

Technical Context

The TPS74515PQWDRBRQ1 implements a precision band-gap reference and error amplifier to achieve ±0.85% output accuracy at 25°C and ±1.5% over –40°C to +150°C junction temperature. Its internal foldback current limit reduces thermal dissipation during short-circuit events, and integrated UVLO (1.17–1.42 V) prevents operation below minimum input threshold.

This device features dual power-good configurations-open-drain and push-pull-with programmable thresholds (PGHTH = 92% VOUT, PGLTH = 90% VOUT) and hysteresis (2% VOUT). Startup time is 200–650 µs, and it remains stable with ≥1-µF ceramic output capacitance without requiring feed-forward capacitors for fixed-output variants.

Key Specifications

Pinout & Package

TPS74515PQWDRBRQ1 uses a 6-pin wettable-flank WSON package (2.00 mm × 2.00 mm body, 0.75 mm height) with exposed thermal pad electrically tied to GND. The package supports automated optical inspection (AOI) of solder joints on bottom-side terminations.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS74515PQWDRBRQ1, TPS74615PQWDRBRQ1 offers tighter PSRR and configurable PG timing but identical pinout and thermal behavior, while TLV76715QWDRBRQ1 sacrifices PG functionality and output current for ultra-low IQ - making it unsuitable for main processor or camera rail use.

Availability

TPS74515PQWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS camera modules, and digital cluster displays requiring stable component supply, AEC-Q100 compliance, and wettable-flank package traceability.

Supply support for TPS74515PQWDRBRQ1 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 ICs, with decades of automotive qualification expertise and broad functional safety documentation support.

The TPS745-Q1 product line delivers ultra-low-dropout regulation with integrated power-good for automotive subsystems demanding high accuracy, low noise, and robust thermal performance in space-constrained wettable-flank packages.

FAQ

What is the maximum output current capability of the TPS74515PQWDRBRQ1?

The TPS74515PQWDRBRQ1 delivers up to 500 mA of continuous output current under recommended operating conditions (TJ ≤ 150°C, VIN ≥ VOUT + 0.5 V). Its internal foldback current limit protects against sustained overloads, and thermal shutdown activates at 170°C junction temperature. For sustained 500 mA operation, ensure PCB thermal design maintains RθJA ≤ 80.3°C/W.

Does the TPS74515PQWDRBRQ1 require an external feedback resistor network?

No, the TPS74515PQWDRBRQ1 is a fixed-output variant with 1.5 V regulation; the FB pin is internally connected to a precision resistor divider and must be left unconnected. External feedback components are only required for adjustable-output versions (e.g., TPS74501). Using external resistors on this part would disrupt regulation and is not supported.

What power-good (PG) configuration does the TPS74515PQWDRBRQ1 support?

The TPS74515PQWDRBRQ1 supports both open-drain and push-pull PG topologies depending on the specific orderable variant. The push-pull version requires no external pull-up resistor and asserts PG high at 92% VOUT with 2% hysteresis; the open-drain version requires a pull-up and sinks current when asserted. Confirm configuration via TI's official datasheet revision history or orderable part number suffix.

Can the TPS74515PQWDRBRQ1 operate with a 1.2-V input supply?

No - the TPS74515PQWDRBRQ1 has a minimum input voltage of 1.5 V per its recommended operating conditions. Input below 1.5 V falls below the undervoltage lockout (UVLO) threshold (1.17–1.42 V), preventing regulation. At 1.5 V input, dropout margin is insufficient for 1.5 V output; a minimum VIN ≥ 1.65 V is required to maintain regulation under load.

Is the thermal pad of the TPS74515PQWDRBRQ1 electrically isolated?

No, the thermal pad on the TPS74515PQWDRBRQ1 is electrically connected to the GND node. It must be soldered directly to the PCB's ground plane to achieve the specified RθJA = 80.3°C/W and ensure reliable thermal performance. Leaving the pad unconnected or floating degrades thermal resistance by >30% and risks thermal shutdown under full load.