Texas Instruments TLV71712PDQNR3

Overview

TLV71712PDQNR3 from Texas Instruments is a 150-mA, low-dropout linear regulator with fixed 1.2 V output, foldback current limit, active pulldown, and ultra-low quiescent current (35 µA). It operates from 1.7 V to 5.5 V input, achieves 215 mV dropout at full load, and maintains 0.5% typical output accuracy - ideal for powering RF-sensitive subsystems in portable electronics.

For engineers reviewing the TLV71712PDQNR3 datasheet, TLV71712PDQNR3 pinout, TLV71712PDQNR3 application, or TLV71712PDQNR3 equivalent, key selection considerations include its 1-mm × 1-mm X2SON package, 0.1 µF minimum stable output capacitance, 40 mA short-circuit foldback limit, 1.6 V undervoltage lockout, and active output discharge capability.

Technical Context

The TLV71712PDQNR3 uses a PMOS pass transistor architecture enabling low dropout and inherent reverse-voltage protection via the body diode. Its foldback current limit initiates near 350 mA and reduces short-circuit current to 40 mA, minimizing power dissipation during faults.

It integrates an active pulldown resistor (120 Ω) to rapidly discharge the output upon shutdown, supports enable control with 0.9 V turn-on threshold, and features undervoltage lockout (UVLO) at 1.6 V to prevent erratic startup. The device is specified for –40°C to +85°C junction temperature operation.

Key Specifications

Pinout & Package

TLV71712PDQNR3 is housed in a 4-pin, 1.0 mm × 1.0 mm X2SON (DQN) package with exposed thermal pad connected 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 TLS850F0TESK and TPS7A0512PDBVR, TLV71712PDQNR3 uniquely balances 150 mA capability, 35 µA IQ, foldback current limiting, and active pulldown in a 1-mm² footprint - making it optimal for consumer portable designs demanding both efficiency and fault resilience.

Availability

TLV71712PDQNR3 is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor nodes, portable medical monitors, and industrial handheld scanners requiring stable component supply across high-mix, low-volume production runs.

Supply support for TLV71712PDQNR3 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.

The TLV717P series was developed specifically for portable, battery-powered devices requiring ultra-low quiescent current, small footprint, and robust fault protection - addressing design constraints in smartphones, wearables, and IoT endpoints.

FAQ

What is the minimum input voltage required for TLV71712PDQNR3 to regulate 1.2 V output?

The TLV71712PDQNR3 requires a minimum input voltage of 1.7 V per recommended operating conditions. With a 215 mV dropout at 150 mA, it can maintain regulation down to VIN = 1.415 V in theory - but TI specifies 1.7 V as the absolute minimum to ensure guaranteed performance across temperature and process variation. Below 1.7 V, undervoltage lockout (UVLO = 1.6 V) may disable regulation.

Does TLV71712PDQNR3 support reverse-voltage protection?

TLV71712PDQNR3 incorporates a PMOS pass transistor with an intrinsic body diode that conducts when VOUT exceeds VIN. While this provides limited reverse conduction capability, TI explicitly states that reverse current is not limited and recommends external current limiting to ≤5% of rated output current if extended reverse-voltage operation is expected. No dedicated reverse-voltage protection circuitry is integrated.

Can TLV71712PDQNR3 operate stably with a 0.1 µF output capacitor?

Yes - TLV71712PDQNR3 is explicitly characterized and guaranteed stable with an effective output capacitance of 0.1 µF ceramic, as confirmed in the Electrical Characteristics table and Application section. This enables use of small-footprint, high-bias-voltage capacitors (e.g., 0402 X5R/X7R) without sacrificing loop stability, provided the effective capacitance under operating bias and temperature remains ≥0.1 µF.

What is the purpose of the active pulldown resistor in TLV71712PDQNR3?

The TLV71712PDQNR3 integrates a 120 Ω active pulldown resistor between OUT and GND that engages automatically when the EN pin is driven below 0.4 V. This rapidly discharges the output capacitor, preventing floating voltages that could cause unintended wake-up, latch-up, or undefined logic states in downstream components - a critical feature for reliable power sequencing in portable systems.

How does the foldback current limit function in TLV71712PDQNR3 during a short circuit?

During a short circuit, TLV71712PDQNR3's foldback current limit reduces output current as VOUT collapses - initiating near 350 mA and settling at ~40 mA when VOUT ≈ 0 V. Unlike fixed current limiting, this foldback behavior lowers power dissipation in the PMOS pass element [(VIN – VOUT) × ILIMIT], reducing thermal stress and enabling safe, indefinite short-circuit operation without thermal shutdown.