Texas Instruments TLV71727PDQNR

Overview

TLV71727PDQNR from Texas Instruments is a 2.7-V fixed-output, 150-mA low-dropout (LDO) linear regulator with foldback current limit, 0.5% typical output accuracy, 215 mV dropout at 150 mA, and active pulldown for fast output discharge-designed for power-sensitive portable electronics such as smart phones and wearables.

For engineers reviewing the TLV71727PDQNR datasheet, TLV71727PDQNR pinout, TLV71727PDQNR application, or TLV71727PDQNR equivalent, key selection considerations include its 35 µA quiescent current, stability with ≥0.1 µF ceramic output capacitance, 1-mm × 1-mm X2SON (DQN) package, and UVLO threshold of 1.6 V.

Technical Context

The TLV71727PDQNR uses a PMOS pass transistor to achieve low dropout and integrates an undervoltage lockout (UVLO = 1.6 V) and active-high enable logic with 0.9 V turn-on threshold. Its foldback current limit initiates near 350 mA and reduces short-circuit current to 40 mA, minimizing power dissipation during faults.

It delivers high PSRR (70 dB at 1 kHz, 50 dB at 1 MHz) and low output noise (55 µV_RMS, 100 Hz–100 kHz), enabled by internal bandgap reference and optimized control loop-making it suitable for RF-sensitive rails where supply rejection and low noise are critical.

Key Specifications

Pinout & Package

TLV71727PDQNR is housed in a 1-mm × 1-mm, 4-pin X2SON (DQN) package with wettable flank leads 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 TLC71727PDBVR and MCP1702T-2702E/MB, TLV71727PDQNR uniquely combines ultra-small 1-mm² packaging, active pulldown, foldback current limiting, and 35 µA IQ-making it optimal for space- and safety-constrained portable systems where board area, fault resilience, and rapid rail discharge are design priorities.

Availability

TLV71727PDQNR is available at Aetrix Electronics and suitable for smart phone power management, wearable sensor subsystems, and industrial handheld terminals requiring stable component supply with consistent parametric performance and RoHS-compliant packaging.

Supply support for TLV71727PDQNR 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 and precision analog solutions.

The TLV717P series was designed specifically for portable, battery-powered devices demanding ultra-low quiescent current, small footprint, and robust fault protection-including foldback current limiting and active output discharge.

FAQ

What is the minimum input voltage required for TLV71727PDQNR to regulate 2.7 V output?

The TLV71727PDQNR requires a minimum input voltage of 2.915 V to maintain regulation at full 150 mA load, based on its 215 mV dropout voltage specification. At lighter loads, regulation is sustained down to 2.7 V + dropout (e.g., ~2.75 V at 10 mA). Below the 1.6 V UVLO threshold, the device remains disabled regardless of load.

Does TLV71727PDQNR require an input capacitor for stability?

No, TLV71727PDQNR does not require an input capacitor for stability, but Texas Instruments recommends a 0.1–1 µF low-ESR ceramic capacitor between IN and GND to improve transient response, reduce ripple, and counteract inductive source impedance-especially when the device is remote from the power source or subject to fast load steps.

How does the foldback current limit function in TLV71727PDQNR during a short circuit?

During a short circuit, TLV71727PDQNR's foldback current limit reduces output current from ~350 mA (initiation point) down to a typical 40 mA short-circuit current. This throttling lowers power dissipation in the PMOS pass element, preventing thermal runaway. Output voltage collapses proportionally (VOUT = ILIMIT × RLOAD), and regulation is lost-consistent with safe fault-mode behavior.

Can TLV71727PDQNR operate without an enable signal connected?

Yes, TLV71727PDQNR can operate without an external enable signal: connecting EN directly to IN places the device in permanent active mode, since VIN (≥1.7 V) exceeds the 0.9 V enable threshold. This configuration eliminates control logic overhead in simple, always-on applications-but forfeits shutdown capability and associated power savings.

What is the purpose of the thermal pad on the TLV71727PDQNR DQN package?

The exposed thermal pad on the TLV71727PDQNR's DQN package must be soldered to the PCB's 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-critical for reliability in sealed or thermally constrained portable enclosures.