Texas Instruments TLV71715PDQNR

Overview

TLV71715PDQNR from Texas Instruments is a 150-mA, low-dropout linear regulator with active pulldown, foldback current limit, and 1.5-V fixed output voltage in a 1-mm × 1-mm X2SON (DQN) package. It delivers 0.5% typical output accuracy, 215 mV dropout at 150 mA, 35 µA quiescent current, and stable operation with only 0.1 µF effective output capacitance-designed for power-sensitive portable electronics such as smart phones and wearables.

For engineers reviewing the TLV71715PDQNR datasheet, TLV71715PDQNR pinout, TLV71715PDQNR application, or TLV71715PDQNR equivalent, key selection considerations include its ultra-small DQN package, active output discharge, UVLO (1.6 V), PSRR (70 dB @ 1 kHz), and compatibility with low-bias ceramic capacitors in space-constrained battery-powered systems.

Technical Context

The TLV71715PDQNR employs a PMOS pass transistor architecture enabling very low dropout and inherent reverse-voltage protection via the body diode. Its internal foldback current limit initiates near 350 mA and reduces short-circuit current to 40 mA, minimizing thermal stress during faults.

It integrates an active pulldown circuit (120 Ω) to rapidly discharge the output when disabled, supports enable control with 0.9 V turn-on threshold, and features undervoltage lockout (UVLO) that holds output off until VIN exceeds 1.6 V-ensuring clean startup in low-input-voltage scenarios.

Key Specifications

Pinout & Package

TLV71715PDQNR is housed in a 4-pin, 1.0 mm × 1.0 mm 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 TLS850F0TESK and AP7361C-15YG-13, TLV71715PDQNR uniquely balances ultra-small size, active pulldown, foldback protection, and sub-1-µF stability-making it optimal for miniaturized, battery-sensitive portable designs where reliability and board area are constrained.

Availability

TLV71715PDQNR is available at Aetrix Electronics and suitable for smart phones, wearable electronics, and USB-powered peripherals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TLV71715PDQNR 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, embedded processing, and digital signal technologies, with decades of leadership in power management innovation.

The TLV717P series was designed specifically for portable, battery-powered applications demanding ultra-low quiescent current, miniature packaging, and robust transient performance-targeting smartphones, wearables, and IoT edge nodes.

FAQ

What is the minimum input voltage required for TLV71715PDQNR to regulate 1.5 V output?

The TLV71715PDQNR requires VIN ≥ 1.715 V to maintain regulation at full 150 mA load, based on its 215 mV typical dropout voltage. At lighter loads, dropout decreases-e.g., ~100 mV at 10 mA-allowing operation down to ~1.6 V. Below 1.6 V, the UVLO circuit disables the device entirely.

Does TLV71715PDQNR require an input capacitor for stability?

No, TLV71715PDQNR does not require an input capacitor for stability, but TI strongly recommends a 0.1–1 µF low-ESR ceramic capacitor between IN and GND. This improves transient response, reduces ripple from noisy sources, and mitigates voltage spikes caused by source inductance-especially critical when the LDO is remote from its power source.

How does the foldback current limit function in TLV71715PDQNR during a short circuit?

During a short circuit, TLV71715PDQNR's foldback current limit reduces output current as VOUT collapses-initiating near 350 mA and settling at ~40 mA typical short-circuit current. This limits power dissipation in the PMOS pass device [(VIN – VOUT) × ILIMIT], preventing thermal runaway and enabling safe recovery once the fault is cleared.

Can TLV71715PDQNR be used without connecting the EN pin?

Yes-TLV71715PDQNR can operate without external EN control by tying EN directly to IN. Since the enable threshold is 0.9 V (min), this connection ensures the device remains enabled whenever VIN is within its operating range (1.7–5.5 V). No pull-up resistor is needed, simplifying designs where enable functionality is unnecessary.

What is the purpose of the thermal pad on the TLV71715PDQNR DQN package?

The exposed thermal pad on the TLV71715PDQNR's DQN package must be soldered to a PCB GND plane to provide a low-thermal-resistance path from the die to ambient. With RθJB = 330°C/W, proper pad connection reduces junction temperature rise by up to 40°C under 150-mA load-ensuring reliable operation within the –40°C to +85°C junction range.