Texas Instruments TPS74518PQWDRVRQ1

Overview

TPS74518PQWDRVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive ultra-low-dropout linear regulator delivering 500 mA with ±0.85% output accuracy at 25°C, 160 mV max dropout at 500 mA (3.3 VOUT), and power-good monitoring in a 2-mm × 2-mm wettable-flank WSON-6 package. It operates from 1.5 V to 6.0 V input and supports fixed 1.8 V output for ADAS camera sensor rails.

For engineers reviewing the TPS74518PQWDRVRQ1 datasheet, TPS74518PQWDRVRQ1 pinout, TPS74518PQWDRVRQ1 application, or TPS74518PQWDRVRQ1 equivalent, key selection criteria include automotive-grade thermal performance (–40°C to +125°C ambient), wettable-flank optical inspection capability, push-pull/open-drain PG output configuration, low 25 µA quiescent current, and stability with ≥1-µF ceramic output capacitance.

Technical Context

The TPS74518PQWDRVRQ1 implements a precision band-gap reference and error amplifier to achieve ±1.5% max output accuracy over –40°C to +150°C junction temperature. Its internal foldback current limit reduces thermal dissipation during short-circuit events, while integrated thermal shutdown, current limit, and UVLO (1.30 V nominal) ensure robust fault protection.

This device supports system-level power sequencing via EN input and PG output, with PG thresholds set at 92% (rising) and 90% (falling) of VOUT and configurable delay timing. The 6-pin WSON package features a thermal pad electrically tied to GND, enabling RθJA = 80.3°C/W and improved thermal performance when soldered to PCB ground planes.

Key Specifications

Pinout & Package

TPS74518PQWDRVRQ1 uses a 6-pin wettable-flank WSON package (2.00 mm × 2.00 mm body, 0.75 mm height) with exposed thermal pad connected to GND. This package supports automated optical inspection (AOI) of solder joints and delivers RθJA = 80.3°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS74618PQWDRVRQ1 and TLV76718QWDRVRQ1, the TPS74518PQWDRVRQ1 delivers optimal balance of 500-mA capability, integrated PG, wettable-flank manufacturability, and AEC-Q100 Grade 1 compliance - making it the preferred choice for mainstream automotive camera and display power rails.

Availability

TPS74518PQWDRVRQ1 is available at Aetrix Electronics and suitable for automotive front/rear camera modules, digital cluster displays, and telematics control units requiring stable component supply, AEC-Q100 qualification, and wettable-flank package support for high-yield SMT assembly.

Supply support for TPS74518PQWDRVRQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management solutions.

The TPS745-Q1 product line delivers automotive-grade ultra-low-dropout regulators with integrated power-good and wettable-flank packaging, designed specifically for ADAS sensors, infotainment systems, and domain controllers demanding high reliability and optical inspectability.

FAQ

What is the maximum input voltage rating for the TPS74518PQWDRVRQ1?

The TPS74518PQWDRVRQ1 has an absolute maximum input voltage rating of 6.5 V, with recommended operating input range from 1.5 V to 6.0 V. Exceeding 6.5 V risks permanent damage. For reliable operation in automotive environments with load-dump transients, external clamping or upstream protection is advised since the device does not integrate transient voltage suppression.

Does the TPS74518PQWDRVRQ1 require an external feedback resistor network?

No, the TPS74518PQWDRVRQ1 is a fixed 1.8 V output variant and does not require external feedback resistors. Pin 2 (FB) is internally connected to the voltage divider; leaving it unconnected or floating is acceptable. External resistors are only needed for adjustable-output versions of the TPS745-Q1 family.

What is the thermal resistance (RθJA) of the TPS74518PQWDRVRQ1 package?

The TPS74518PQWDRVRQ1 uses the DRV (WSON-6) package with RθJA = 80.3°C/W under standard JEDEC JESD51-7 conditions. This value assumes a 2-layer PCB with 1-in² copper pour connected to the thermal pad. Actual thermal performance improves significantly with multilayer boards and larger GND plane connections.

Can the TPS74518PQWDRVRQ1 be used with a 1-µF output capacitor?

Yes, the TPS74518PQWDRVRQ1 is stable with a minimum 1-µF ceramic output capacitor - including X5R and X7R types - eliminating need for larger or more expensive capacitor technologies. The 1-µF value satisfies both stability and transient response requirements per TI's design guidelines and electrical characterization.

Is the power-good (PG) output of the TPS74518PQWDRVRQ1 open-drain or push-pull?

The TPS74518PQWDRVRQ1 supports both open-drain and push-pull PG configurations depending on the specific orderable part number suffix. The 'PQ' in TPS74518PQWDRVRQ1 indicates the push-pull version, which drives high actively and requires no external pull-up resistor - simplifying schematic design and reducing component count.