Texas Instruments TLV71725PDQNR

Overview

TLV71725PDQNR from Texas Instruments is a 150-mA, low-dropout linear regulator with 2.5-V fixed output, 215-mV dropout at full load, 0.5% typical output accuracy, and 35-µA quiescent current. It features foldback current limiting (40-mA short-circuit limit), active pulldown for fast output discharge, and operates from 1.7-V to 5.5-V input in portable power rails for microcontrollers and RF subsystems.

For engineers reviewing the TLV71725PDQNR datasheet, TLV71725PDQNR pinout, TLV71725PDQNR application, or TLV71725PDQNR equivalent, key selection criteria include dropout performance under 150-mA load, stability with 0.1-µF ceramic output capacitance, enable threshold compatibility with low-voltage GPIOs, and thermal behavior in the 1-mm × 1-mm X2SON package.

Technical Context

The TLV71725PDQNR uses a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its foldback current limit initiates near 350 mA and reduces short-circuit current to 40 mA, minimizing power dissipation during faults. The device integrates undervoltage lockout (1.6 V) and an active pulldown resistor (120 Ω) for controlled output discharge during shutdown.

It achieves 70-dB PSRR at 1 kHz and maintains regulation with no load while consuming only 35 µA quiescent current. The internal bandgap reference and error amplifier deliver ±1.5% output accuracy across –40°C to +85°C junction temperature, supporting battery-powered applications requiring stable low-noise biasing.

Key Specifications

Pinout & Package

TLV71725PDQNR 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. The package supports reflow soldering per JEDEC J-STD-020 and has MSL Level 1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71725PDBVR and MCP1700T-2502E/TT, TLV71725PDQNR offers superior thermal performance in minimal footprint, integrated fault protection, and faster output discharge-making it optimal for space- and reliability-constrained portable electronics.

Availability

TLV71725PDQNR is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hub supply, and industrial IoT edge node applications requiring stable component supply, long-term manufacturability, and qualified automotive-grade alternatives.

Supply support for TLV71725PDQNR 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 connectivity solutions for industrial, automotive, and consumer markets.

The TLV717P series was developed specifically for portable and battery-powered devices demanding ultra-low quiescent current, fast transient response, and robust fault protection in miniature packages.

FAQ

What is the minimum input voltage required for TLV71725PDQNR to regulate at full 150-mA load?

The TLV71725PDQNR requires a minimum input voltage of 2.715 V to maintain regulation at 150 mA, calculated as V_OUT + V_DO = 2.5 V + 0.215 V. Below this, the device enters dropout mode where output voltage drops linearly with input. This headroom enables efficient use of single-cell Li-ion batteries down to their end-of-discharge voltage.

Does TLV71725PDQNR require an input capacitor for stability?

No, TLV71725PDQNR does not require an input capacitor for stability, but Texas Instruments recommends a 0.1-µF to 1-µF low-ESR ceramic capacitor from IN to GND. This improves transient response, reduces ripple from noisy sources, and mitigates voltage excursions caused by inductive source impedances-especially important when the regulator is located remotely from its power source.

How does the foldback current limit function in TLV71725PDQNR during a short-circuit event?

In TLV71725PDQNR, foldback current limiting reduces output current as output voltage collapses. When V_OUT falls below ~1.5 V, the current decreases toward a 40-mA short-circuit limit (typical). This lowers power dissipation in the PMOS pass element compared to a fixed current limit, preventing thermal damage and enabling safe sustained short-circuit operation without external intervention.

Can TLV71725PDQNR be used with output capacitance smaller than 1 µF?

Yes, TLV71725PDQNR is stable with an effective output capacitance as low as 0.1 µF, provided it is a ceramic type (X5R/X7R) and maintains ≥0.1 µF under operating bias and temperature. This allows use of compact 0201/0402 capacitors in ultra-thin devices. However, TI recommends 1 µF for optimal transient response and PSRR performance in most applications.

What is the purpose of the thermal pad on the TLV71725PDQNR DQN package?

The exposed thermal pad on the TLV71725PDQNR's DQN package must be soldered to the PCB ground plane to provide a low-thermal-resistance path from the die to ambient. With R_θJB = 330°C/W, proper pad connection reduces junction temperature rise by up to 40°C at 150 mA, ensuring reliable operation within the –40°C to +85°C junction range and preventing thermal shutdown.