Texas Instruments TLV71725PDQNT

Overview

TLV71725PDQNT 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 accuracy, 35 µA quiescent current, and foldback current limiting-designed for power-sensitive portable electronics such as smartphones and wearables.

For engineers reviewing the TLV71725PDQNT datasheet, TLV71725PDQNT pinout, TLV71725PDQNT application, or TLV71725PDQNT equivalent, key selection criteria include ultra-low IQ, stability with 0.1 µF ceramic output capacitance, active pulldown for fast output discharge, high PSRR (70 dB @ 1 kHz), and operation across –40°C to +85°C junction temperature.

Technical Context

The TLV71725PDQNT employs a PMOS pass transistor enabling very low dropout voltage and inherent reverse-current blocking. Its internal foldback current limit initiates near 350 mA and reduces short-circuit current to ~40 mA, minimizing thermal stress during faults.

It integrates undervoltage lockout (UVLO = 1.6 V), an active-high enable pin (VIH = 0.9 V, VIL = 0.4 V), and an on-chip 120 Ω pulldown resistor for rapid output discharge in shutdown-critical for system-level power sequencing and rail collapse control.

Key Specifications

Pinout & Package

TLV71725PDQNT is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with wettable flanks and an 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 TPL71725PDQNR and MCP1700T-2502E/MB, TLV71725PDQNT delivers superior fault resilience via foldback current limiting and faster system-level power-down via integrated pulldown-making it the preferred choice for compact, battery-powered devices requiring robust, sequenced power management.

Availability

TLV71725PDQNT is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor bias rails, industrial handheld terminals, medical point-of-care monitors, and other applications requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV71725PDQNT 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 and industrial applications.

The TLV717xx series was designed specifically for power-sensitive portable electronics-emphasizing ultra-low quiescent current, small footprint, and robust fault handling in space-constrained, battery-operated systems.

FAQ

What is the minimum input voltage required for TLV71725PDQNT to regulate 2.5 V output?

The TLV71725PDQNT requires a minimum input voltage of 2.715 V to maintain regulation at 150 mA load, based on its 215 mV dropout specification. At lighter loads, regulation is possible down to 1.7 V input, but output accuracy degrades below the dropout threshold. For reliable operation across temperature and process variation, TI specifies 1.7 V as the absolute minimum input under recommended conditions.

Does TLV71725PDQNT require an external pull-up resistor on the EN pin?

No, TLV71725PDQNT does not require an external pull-up on EN. The device features an internal pull-down on the EN pin, ensuring default shutdown when left unconnected. An external pull-up is only needed if system-level logic mandates forced enable during power-up sequences-otherwise, connecting EN directly to IN provides always-on operation.

Can TLV71725PDQNT operate with a 0.1 µF output capacitor?

Yes, TLV71725PDQNT is stable with an effective output capacitance of 0.1 µF or greater-verified across temperature, voltage bias, and dielectric type. However, TI recommends a 1 µF X5R/X7R ceramic capacitor for typical applications to ensure margin in transient response and PSRR performance. A 0.1 µF rated capacitor may fall below 0.1 µF effective value under bias and temperature, so derating must be confirmed.

What is the purpose of the thermal pad on the TLV71725PDQNT DQN package?

The exposed thermal pad on the TLV71725PDQNT's DQN package must be soldered to a PCB ground plane to achieve specified thermal performance-reducing RθJB from 393.3°C/W (no pad connection) to 330°C/W. This improves power dissipation capability and prevents thermal shutdown during sustained 150 mA operation, especially in enclosed or high-ambient environments.

How does the foldback current limit in TLV71725PDQNT improve system reliability?

The foldback current limit in TLV71725PDQNT reduces output current as output voltage collapses-e.g., during short-circuit events-limiting short-circuit current to ~40 mA instead of holding 150 mA. This cuts power dissipation in the PMOS pass element by >80%, preventing thermal runaway and enabling safe, self-limiting fault behavior without external current-sense circuitry.