Texas Instruments TLV71727PDQNT

Overview

TLV71727PDQNT from Texas Instruments is a 150-mA, low-dropout linear regulator with 2.7 V fixed output voltage, 215 mV dropout at full load, 0.5% typical accuracy, 35 µA quiescent current, and active pulldown for rapid output discharge. It serves as a power supply rail generator in portable electronics requiring stable low-noise bias for RF front-ends or microcontrollers.

For engineers reviewing the TLV71727PDQNT datasheet, TLV71727PDQNT pinout, TLV71727PDQNT application, or TLV71727PDQNT equivalent, key selection criteria include dropout performance under 150 mA load, foldback current limit behavior (40 mA short-circuit), PSRR at 1 kHz (65 dB), stability with 0.1 µF ceramic output capacitance, and operation across –40°C to +85°C junction temperature.

Technical Context

The TLV71727PDQNT uses a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-voltage protection via its 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 undervoltage lockout (UVLO = 1.6 V), active-high enable logic with 0.9 V turn-on threshold, and an internal 120 Ω pulldown resistor to discharge the output during shutdown - critical for sequencing-sensitive systems.

Key Specifications

Pinout & Package

TLV71727PDQNT is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with wettable flanks, optimized for space-constrained portable PCBs. Thermal pad must be connected to GND for optimal thermal performance (R_θJB = 330°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F27T and MCP1700T-2702E/MB, TLV71727PDQNT uniquely balances ultra-low dropout (215 mV), integrated foldback, active pulldown, and 1-mm² footprint - making it optimal for space- and battery-limited portable designs where fault resilience and sequencing control are mandatory.

Availability

TLV71727PDQNT is available at Aetrix Electronics and suitable for smartphone baseband power, wearable sensor hubs, industrial handheld terminals, and medical point-of-care display biasing requiring stable component supply with guaranteed long-term sourcing.

Supply support for TLV71727PDQNT 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, industrial, and automotive markets.

The TLV717P series was designed specifically for power-sensitive portable devices - delivering low IQ, small footprint, and robust fault protection while maintaining high accuracy and transient performance across battery voltage ranges.

FAQ

What is the minimum input voltage required for TLV71727PDQNT to regulate 2.7 V at 150 mA?

The TLV71727PDQNT requires a minimum input voltage of 2.915 V to maintain regulation at 150 mA load, based on its typical 215 mV dropout voltage. Below this, the device enters dropout mode where output voltage tracks input minus dropout. Input must also exceed the 1.6 V UVLO threshold for initial startup.

Does TLV71727PDQNT support reverse-voltage protection?

Yes - the TLV71727PDQNT's PMOS pass transistor includes an intrinsic body diode that conducts when OUT exceeds IN. However, this diode is not current-limited; TI recommends external current limiting to ≤5% of rated output (≤7.5 mA) if sustained reverse voltage is expected in the system.

Can TLV71727PDQNT operate with a 0.1 µF output capacitor?

Yes - TLV71727PDQNT is stable with an effective output capacitance of 0.1 µF or greater. This refers to the capacitance value *under operating bias and temperature*, not the nominal rated value. A 0.1 µF X5R/X7R ceramic capacitor is typically sufficient, provided its effective capacitance remains ≥0.1 µF at the applied DC bias and operating temperature.

What is the purpose of the active pulldown resistor in TLV71727PDQNT?

The TLV71727PDQNT integrates a 120 Ω pulldown resistor between OUT and GND that activates automatically when EN is pulled low. This rapidly discharges the output node, ensuring predictable power-down behavior and preventing floating voltages that could cause latch-up or false triggering in downstream logic circuits.

How does the foldback current limit function in TLV71727PDQNT during a short-circuit event?

During a short-circuit, TLV71727PDQNT's foldback current limit reduces output current from ~350 mA (initiation point) down to ~40 mA (short-circuit current). This nonlinear reduction lowers power dissipation in the pass transistor - (VIN – VOUT) × ILIMIT - preventing thermal damage and enabling safe recovery once the fault is removed.