Texas Instruments TPS745105PQWDRVRQ1

Overview

TPS745105PQWDRVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 500-mA ultra-low-dropout linear regulator with power-good (PG) output, fixed 1.05-V output, 2-mm × 2-mm wettable-flank WSON-6 package, ±0.85% output accuracy at 25°C, and 160 mV max dropout at 500 mA - designed for post-regulation in ADAS camera modules and infotainment domain controllers.

For engineers reviewing the TPS745105PQWDRVRQ1 datasheet, TPS745105PQWDRVRQ1 pinout, TPS745105PQWDRVRQ1 application, or TPS745105PQWDRVRQ1 equivalent, key selection criteria include automotive-grade thermal performance (–40°C to +125°C ambient), wettable-flank optical inspection support, push-pull PG output compatibility, and stability with ≥1-µF ceramic output capacitance.

Technical Context

The TPS745105PQWDRVRQ1 implements a precision band-gap reference and error amplifier to achieve ±0.85% 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 (1.17–1.42 V threshold) and thermal shutdown (170°C trip) ensure robust fault protection.

This device supports fast transient response via low-output-impedance architecture and operates across 1.5 V to 6.0 V input, enabling use as a post-regulator after buck converters. The power-good output monitors feedback voltage with 92% VOUT rising threshold and 2% hysteresis, supporting reliable supply sequencing in multi-rail automotive systems.

Key Specifications

Pinout & Package

TPS745105PQWDRVRQ1 uses a 6-pin wettable-flank WSON package (2.00 mm × 2.00 mm body, 0.75 mm height) with exposed thermal pad electrically connected to GND. This package supports automated optical inspection (AOI) of solder joints on automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS745105PQWDRVRQ1, the TPS74510PQWDRVRQ1 offers identical form-factor and thermal performance but targets 1.0-V systems, while TLV76710QWDRVRQ1 trades PG functionality and accuracy for ultra-low quiescent current - making TPS745105PQWDRVRQ1 the sole choice for 1.05-V automotive core rails requiring sequencing and ASIL-compliant monitoring.

Availability

TPS745105PQWDRVRQ1 is available at Aetrix Electronics and suitable for automotive front/rear camera modules, digital instrument clusters, and ADAS domain controllers requiring stable component supply with AEC-Q100 traceability and extended temperature support.

Supply support for TPS745105PQWDRVRQ1 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 experience in high-reliability power management solutions.

The TPS745-Q1 product line delivers ultra-low-dropout regulators with integrated power-good and wettable-flank packaging specifically for automotive ADAS, infotainment, and body electronics demanding AEC-Q100 Grade 1 operation and functional safety documentation.

FAQ

What is the output voltage tolerance of the TPS745105PQWDRVRQ1 over temperature?

The TPS745105PQWDRVRQ1 guarantees ±1.5% output voltage accuracy over the full junction temperature range of –40°C to +150°C. At 25°C, the tighter specification is ±0.85%, enabling precise biasing for sensitive analog circuits in automotive camera ISPs and radar receivers. This accuracy includes effects of line, load, and temperature variation - no external calibration is needed.

Does the TPS745105PQWDRVRQ1 require an external pull-up resistor on the PG pin?

No, the TPS745105PQWDRVRQ1 uses a push-pull PG output configuration, so no external pull-up resistor is required. The PG pin actively drives high when VOUT reaches 92% of 1.05 V and drives low when VOUT falls below 90% - simplifying schematic design and reducing BOM count compared to open-drain alternatives that mandate external resistors.

Can the TPS745105PQWDRVRQ1 operate with a 1.2-V input supply?

No - the TPS745105PQWDRVRQ1 has a minimum input voltage of 1.5 V per its recommended operating conditions. With a fixed 1.05-V output and 160-mV max dropout, the absolute minimum valid input is 1.21 V, but the device will not enable or regulate reliably below 1.5 V due to internal UVLO (1.17–1.42 V) and startup circuit constraints. Always maintain VIN ≥ 1.5 V.

Is the thermal pad of the TPS745105PQWDRVRQ1 electrically connected?

Yes, the exposed thermal pad on the TPS745105PQWDRVRQ1 is electrically connected to the GND node. It must be soldered to a PCB copper pour tied to the system ground plane to achieve the specified RθJA = 80.3°C/W and ensure safe operation at 500 mA continuous load. Leaving it floating or unconnected degrades thermal performance and risks thermal shutdown.

How does the TPS745105PQWDRVRQ1 support functional safety compliance in automotive designs?

The TPS745105PQWDRVRQ1 is designated Functional Safety-Capable: Texas Instruments provides FIT rate data, failure mode effect analysis (FMEA), and diagnostic coverage metrics in dedicated documentation. These resources directly support ISO 26262 ASIL-B hardware development, enabling systematic fault handling in safety-critical power domains such as front-camera vision processing.