Texas Instruments TLV71310PQDBVRQ1

Overview

TLV71310PQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified, capacitor-free 150-mA low-dropout (LDO) regulator with foldback current limit, designed for automotive power rails. It delivers 1.0 V output at ±1% accuracy over –40°C to 125°C, features 230 mV dropout at 150 mA, 50 µA quiescent current, and active output discharge - enabling use in automotive head units and ADAS ECUs where space, reliability, and low IQ are critical.

For engineers reviewing the TLV71310PQDBVRQ1 datasheet, TLV71310PQDBVRQ1 pinout, TLV71310PQDBVRQ1 application, or TLV71310PQDBVRQ1 equivalent, key selection considerations include its capacitor-free stability, AEC-Q100 qualification, foldback overcurrent protection, thermal shutdown behavior, and SOT-23 (DBV) package compatibility with high-density automotive PCB layouts.

Technical Context

The TLV71310PQDBVRQ1 employs a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-voltage blocking via the body diode. Its internal control loop achieves stable operation without mandatory output capacitance while supporting optional COUT up to 100 µF for improved transient response.

It integrates undervoltage lockout (UVLO), active-high enable with 0.9 V turn-on threshold, 120 Ω active pulldown on shutdown, and foldback current limiting that reduces output current as VOUT collapses - delivering ~40 mA into short-circuit while preventing thermal runaway.

Key Specifications

Pinout & Package

TLV71310PQDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with exposed thermal pad electrically tied to GND. The thermal pad must be soldered to a PCB ground plane for optimal thermal performance (RθJB = 76.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71310PQDBVRQ1, TLV71310PDBVR offers identical performance at lower cost but lacks automotive qualification, while TLS850F0TESA1 provides enhanced system supervision at the expense of higher quiescent current and larger footprint - making TLV71310PQDBVRQ1 optimal for space-constrained, qualified 150-mA LDO needs.

Availability

TLV71310PQDBVRQ1 is available at Aetrix Electronics and suitable for automotive head units, ADAS ECUs, and microprocessor rails requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV71310PQDBVRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade power management solutions.

The TLV713P-Q1 product line was engineered specifically for AEC-Q100-compliant automotive subsystems demanding ultra-low IQ, capacitor-free simplicity, and robust fault protection in harsh thermal environments.

FAQ

What is the minimum input voltage required for TLV71310PQDBVRQ1 to regulate 1.0 V output?

The TLV71310PQDBVRQ1 requires a minimum input voltage of 1.4 V per its recommended operating conditions. At 150 mA load, its typical dropout is 230 mV - meaning it can maintain regulation down to VIN = 1.23 V, but guaranteed operation starts at 1.4 V. Below this, UVLO disables the device to prevent unstable behavior.

Does TLV71310PQDBVRQ1 require an output capacitor to operate stably?

No, TLV71310PQDBVRQ1 is explicitly designed for capacitor-free operation and remains stable without any output capacitor. However, adding a 0.1–1 µF ceramic capacitor at the OUT pin significantly improves load transient response and reduces output voltage deviation during dynamic current steps.

How does the foldback current limit function in TLV71310PQDBVRQ1 during a short-circuit event?

During output short-circuit, TLV71310PQDBVRQ1 reduces output current progressively as VOUT collapses - limiting typical short-circuit current to ~40 mA. This foldback behavior lowers power dissipation in the PMOS pass element, delaying thermal shutdown and enabling safer fault recovery compared to constant-current limit architectures.

What is the purpose of the NC pin (Pin 4) on TLV71310PQDBVRQ1?

Pin 4 is a no-connect (NC) terminal with no internal bond wire or circuit connection. It must remain unconnected - neither routed nor tied to GND or any other net - to avoid introducing parasitic capacitance or leakage paths that could degrade noise performance or ESD robustness in the SOT-23 package.

Can TLV71310PQDBVRQ1 be used in systems requiring active output discharge during shutdown?

Yes, TLV71310PQDBVRQ1 integrates an active pulldown circuit that connects a 120 Ω resistor between OUT and GND when EN is low. This discharges output capacitance rapidly - critical for preventing floating voltages, ensuring deterministic power sequencing, and meeting automotive wake-up timing requirements after ignition-off.