Texas Instruments TPS78415QWDRBRQ1

Overview

TPS78415QWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO voltage regulator delivering 300 mA output with 1.5 V fixed output, 115 mV max dropout at 300 mA (3.3 V_OUT), 0.5% typical output accuracy, and 50-dB PSRR up to 100 kHz - designed for powering noise-sensitive analog circuits in head units and instrument clusters.

For engineers reviewing the TPS78415QWDRBRQ1 datasheet, TPS78415QWDRBRQ1 pinout, TPS78415QWDRBRQ1 application, or TPS78415QWDRBRQ1 equivalent, key selection criteria include ultra-low dropout under high load, ±1.7% full-temperature-range accuracy, functional safety documentation support, and wettable flank VSON-8 packaging for automated optical inspection in automotive PCB assembly.

Technical Context

The TPS78415QWDRBRQ1 implements a PMOS pass transistor architecture enabling ultra-low dropout and foldback current limiting during overcurrent events. Its internal 500-µs soft-start reduces inrush current and allows use of smaller input capacitance.

It features active output discharge via integrated pulldown circuit (120 Ω typical), precise enable threshold (VEN(HI) = 0.85 V min), and thermal shutdown with hysteresis (170°C trip / 155°C reset) - all qualified across –40°C to +125°C ambient (–40°C to +150°C junction).

Key Specifications

Pinout & Package

TPS78415QWDRBRQ1 uses the wettable flank VSON-8 (DRB) package (3.00 mm × 3.00 mm), optimized for automated optical inspection and thermal performance (R_θJB = 34.3°C/W). The exposed thermal pad is electrically connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS78415QWDRBRQ1, the TPS78412QWDRBRQ1 offers identical performance at 1.2 V for core logic rails, while TLV73315PQDBVRQ1 trades PSRR and dropout for lower cost and smaller SOT-23-5 footprint - making TPS78415QWDRBRQ1 optimal for noise-sensitive, high-reliability automotive analog power domains.

Availability

TPS78415QWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, hybrid instrument clusters, and telematics control units requiring stable component supply with AEC-Q100 compliance and long-term production continuity.

Supply support for TPS78415QWDRBRQ1 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-grade power management ICs with decades of automotive qualification experience.

The TPS784-Q1 product line delivers high-accuracy, low-noise, and functionally safe LDOs specifically engineered for demanding automotive subsystems including infotainment, ADAS, and body electronics.

FAQ

What is the maximum input voltage rating for TPS78415QWDRBRQ1?

The absolute maximum input voltage for TPS78415QWDRBRQ1 is 6.5 V, but the recommended operating range is 1.65 V to 6.0 V. Exceeding 6.5 V risks permanent damage. This wide input range supports direct connection to automotive 12-V battery rails (via intermediate buck stage) or 3.3-V/5-V intermediate supplies, making TPS78415QWDRBRQ1 flexible for multi-rail architectures.

Does TPS78415QWDRBRQ1 require an external feedback resistor network?

No, TPS78415QWDRBRQ1 does not require external feedback resistors because it is a fixed-output 1.5 V variant. The FB pin is not used in this configuration and is internally connected - unlike adjustable versions of the TPS784-Q1 family. This simplifies design, eliminates resistor tolerance errors, and reduces bill-of-materials count for dedicated 1.5 V applications.

How does the active output discharge feature work in TPS78415QWDRBRQ1?

TPS78415QWDRBRQ1 integrates a 120 Ω pulldown resistor between OUT and GND that activates automatically when the EN pin is driven low. This rapidly discharges output capacitance, preventing floating or unintended biasing of downstream circuitry during power-down sequences - critical for reliable CAN transceiver reset, display blanking, and functional safety shutdown protocols.

Is TPS78415QWDRBRQ1 compatible with standard VSON-8 reflow profiles?

Yes, TPS78415QWDRBRQ1's wettable flank VSON-8 (DRB) package is qualified for standard lead-free reflow profiles per JEDEC J-STD-020. Its thermal pad design supports both visual solder joint inspection and robust thermal performance (R_θJB = 34.3°C/W), enabling high-yield automotive PCB assembly without special process modifications.

What functional safety documentation is provided for TPS78415QWDRBRQ1?

Texas Instruments provides functional safety documentation for TPS78415QWDRBRQ1 including FIT rate data, failure mode effects analysis (FMEA), and diagnostic coverage metrics - all accessible via TI's functional safety portal. This enables system-level ISO 26262 ASIL-B compliance for safety-critical automotive applications such as instrument cluster power domains.