Texas Instruments TLV71310PDBVR

Overview

TLV71310PDBVR from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with active output discharge, 1% output accuracy, 230 mV dropout at 150 mA, and 50 µA quiescent current. It delivers stable 1.0-V fixed output for ultra-low-power portable systems requiring minimal board space and fast load transient response.

For engineers reviewing the TLV71310PDBVR datasheet, TLV71310PDBVR pinout, TLV71310PDBVR application, or TLV71310PDBVR equivalent, key selection criteria include foldback current limiting, input voltage range (1.4 V to 5.5 V), PSRR (65 dB at 1 kHz), thermal shutdown (158°C), and compatibility with zero-output-capacitor operation in space-constrained battery-powered designs.

Technical Context

The TLV71310PDBVR implements a PMOS pass transistor architecture enabling ultra-low dropout and capacitor-free stability. Its internal foldback current limit reduces output current during overloads to minimize power dissipation and prevent thermal runaway.

It integrates an enable pin with 0.9 V turn-on threshold and 0.4 V shutdown threshold, plus an active pulldown resistor (120 Ω) on the OUT pin for rapid discharge of downstream capacitance-critical for sequencing and safety in multi-rail systems.

Key Specifications

Pinout & Package

TLV71310PDBVR uses the 5-pin SOT-23 (DBV) package (2.90 mm × 1.60 mm), with exposed thermal pad electrically tied to GND for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71310PDBVR, TLV71310PDQNR offers identical performance in a smaller package but requires different layout and assembly; TPL71310PDQNR trades accuracy and active discharge for cost reduction-making it viable only where those features are non-critical.

Availability

TLV71310PDBVR is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth Low Energy modules, and industrial wireless sensors requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV71310PDBVR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management ICs.

The TLV713 series was designed specifically for portable, battery-powered devices needing capacitor-free LDOs with foldback protection, ultra-low IQ, and fast transient response-targeting wearables, hearables, and edge IoT nodes.

FAQ

What is the minimum input voltage required for TLV71310PDBVR to regulate 1.0 V output?

The TLV71310PDBVR requires a minimum input voltage of 1.23 V to maintain regulation at 150 mA load, based on its 230 mV dropout specification. At lighter loads, dropout decreases-enabling operation down to 1.1 V input at 10 mA. The absolute minimum input rating is 1.4 V per recommended operating conditions, ensuring reliable startup and thermal margin across temperature.

Does TLV71310PDBVR require an output capacitor to remain stable?

No, TLV71310PDBVR is explicitly designed for capacitor-free operation and remains stable with 0 µF COUT. This eliminates the need for external output capacitance, reducing BOM count and PCB area. However, adding a 1-µF ceramic capacitor improves load transient response and reduces output noise-especially beneficial in noise-sensitive analog applications.

What is the purpose of the NC pin on TLV71310PDBVR?

The NC (No Connect) pin on TLV71310PDBVR (Pin 4 in DBV package) has no internal connection and must remain unconnected-neither tied to GND nor routed. It exists for mechanical compatibility with other variants in the TLV713 family and does not affect electrical performance. Leaving it floating avoids unintended parasitic coupling or solder bridging risks.

How does the foldback current limit function in TLV71310PDBVR during a short circuit?

Under short-circuit conditions, TLV71310PDBVR's foldback current limit reduces output current from its nominal 180 mA limit to approximately 40 mA. This nonlinear reduction lowers power dissipation (P = VOUT × IOUT ≈ 1.0 V × 40 mA = 40 mW), preventing thermal shutdown and enabling safe, sustained operation until the fault clears-unlike constant-current limiters that would dissipate >180 mW.

Can TLV71310PDBVR be used with a 0.9-V input source?

No, TLV71310PDBVR cannot regulate with a 0.9-V input. Its absolute minimum input voltage is 1.4 V per recommended operating conditions, and its dropout voltage at 150 mA is 230 mV-requiring at least 1.23 V to sustain 1.0-V output. Operation below 1.4 V violates specifications and may result in unregulated output, increased noise, or failure to start up reliably across temperature and process variation.