Texas Instruments TLV71311PDBVR

Overview

TLV71311PDBVR from Texas Instruments is a capacitor-free, 150-mA low-dropout linear regulator with 1.1-V fixed output, 1% accuracy, 230 mV dropout at 150 mA, 50 µA quiescent current, and active output discharge. It serves as a power supply rail generator for ultra-low-power portable systems where board space and startup behavior are critical.

For engineers reviewing the TLV71311PDBVR datasheet, TLV71311PDBVR pinout, TLV71311PDBVR application, or TLV71311PDBVR equivalent, key selection criteria include foldback current limiting for battery protection, capacitor-free stability enabling minimal BOM count, active pulldown for controlled power-down sequencing, and X2SON-4 package suitability for high-density wearable designs.

Technical Context

The TLV71311PDBVR integrates an internal PMOS pass element with inrush current control and thermal shutdown. Its foldback current limit reduces output current to ~40 mA under short-circuit conditions, minimizing power dissipation and input source stress.

Unlike traditional LDOs, it achieves stability without mandatory output capacitance due to internal compensation-enabling operation with zero C_OUT or any ceramic capacitor up to 100 µF. The P-suffix variant adds an integrated 120-Ω pulldown resistor on the OUT pin for rapid discharge when disabled.

Key Specifications

Pinout & Package

TLV71311PDBVR uses the 4-pin X2SON (DQN) package: 1.00 mm × 1.00 mm body, 0.35 mm height, wettable flank terminations. Thermal pad is internally connected to GND and must be soldered to PCB ground plane for thermal reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL71311PDBVR and MCP1711T-1102E/MB, TLV71311PDBVR uniquely combines capacitor-free stability, foldback current limiting, and active output discharge in a 1-mm² package-making it optimal for space- and safety-critical battery-powered edge devices where fault resilience and minimal BOM are non-negotiable.

Availability

TLV71311PDBVR is available at Aetrix Electronics and suitable for wearable health monitors, BLE sensor nodes, industrial wireless transmitters, and portable diagnostic tools requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TLV71311PDBVR 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 power management ICs for portable, industrial, and automotive markets.

The TLV713 series was designed specifically for capacitor-free, low-I_Q power delivery in space-constrained portable electronics-emphasizing foldback protection, fast transient response, and seamless integration into battery-powered subsystems.

FAQ

What is the minimum input voltage required for TLV71311PDBVR to regulate 1.1 V output?

The TLV71311PDBVR requires a minimum input voltage of 1.4 V per its recommended operating conditions. With a typical dropout of 230 mV at 150 mA, it can maintain regulation down to VIN = 1.33 V under light loads-but 1.4 V is the guaranteed functional lower limit across temperature and process variation. Always maintain VIN ≥ VOUT + VDO margin for reliable operation.

Does TLV71311PDBVR require external capacitors to operate stably?

No, TLV71311PDBVR is explicitly designed for capacitor-free operation and remains stable with 0 µF output capacitance. It also remains stable with any ceramic output capacitor from 0.1 µF to 100 µF. An input capacitor (≥1 µF ceramic) is recommended for EMI filtering but is not required for stability.

How does the foldback current limit function in TLV71311PDBVR during a short circuit?

Under short-circuit conditions, TLV71311PDBVR reduces output current from 150 mA to approximately 40 mA (ISC = 40 mA). This foldback behavior lowers power dissipation in the pass element, preventing thermal runaway and preserving battery energy-critical for unattended portable devices where faults may persist for extended periods.

What is the purpose of the active output discharge feature in TLV71311PDBVR?

The active output discharge in TLV71311PDBVR uses an internal 120-Ω pulldown resistor on the OUT pin to rapidly discharge the output capacitor when the device is disabled via EN. This ensures the output falls below 100 mV within 100 µs, preventing floating rails that could cause logic glitches, I²C bus lockup, or improper reset sequencing in multi-rail systems.

Can TLV71311PDBVR be used with a 1.2-V GPIO to control the EN pin?

Yes. TLV71311PDBVR specifies V_EN(HI) = 0.9 V (min) and V_EN(LO) = 0.4 V (max), making it fully compatible with 1.2-V logic families. A 1.2-V GPIO will reliably enable the device, and pulling EN to GND or ≤0.4 V will place it in shutdown with <1 µA quiescent current.