Texas Instruments TLV71312PDQNT

Overview

TLV71312PDQNT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with foldback current limiting, designed for power-sensitive portable applications. It delivers 1.2 V output at ±1% accuracy over –40°C to 125°C, features 230 mV dropout at 150 mA, 50 µA quiescent current, and operates from 1.4 V to 5.5 V input.

For engineers reviewing the TLV71312PDQNT datasheet, TLV71312PDQNT pinout, TLV71312PDQNT application, or TLV71312PDQNT equivalent, key selection criteria include capacitor-free stability, foldback overcurrent protection, thermal shutdown behavior, and compatibility with ultra-low-power battery-powered systems requiring fast start-up and active discharge capability.

Technical Context

The TLV71312PDQNT implements a PMOS pass transistor architecture enabling stable operation without an output capacitor-critical for space-constrained designs. Its foldback current limit reduces output current during overload to minimize power dissipation and thermal stress.

It integrates undervoltage lockout (UVLO), thermal shutdown at 158°C, and active output discharge via an internal 120-Ω pulldown resistor (P-version only). Enable logic thresholds are V_EN(HI) = 0.9 V and V_EN(LO) = 0.4 V, supporting direct connection to microcontroller GPIOs.

Key Specifications

Pinout & Package

TLV71312PDQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON package with exposed thermal pad electrically tied to GND. The compact footprint supports high-density PCB layouts in portable devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F2BHTSA1 and MCP1700T-1202E/TT, TLV71312PDQNT uniquely combines capacitor-free operation, foldback current limiting, and active discharge in a 1.0×1.0 mm package-making it optimal for miniaturized, battery-critical portable medical and consumer electronics where reliability under fault conditions and minimal bill-of-materials are design priorities.

Availability

TLV71312PDQNT is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth Low Energy modules, and industrial wireless sensor nodes requiring stable component supply across extended production lifecycles.

Supply support for TLV71312PDQNT 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, signal chain, and connectivity solutions.

The TLV713 series was developed specifically for portable, battery-powered devices demanding ultra-low quiescent current, capacitor-free stability, and robust fault protection-enabling longer runtime and smaller form factors in consumer and medical electronics.

FAQ

What is the dropout voltage specification for TLV71312PDQNT at full load?

The TLV71312PDQNT has a dropout voltage of 230 mV (typical) at 150 mA output current and 125°C junction temperature, measured at V_OUT = 1.176 V (98% of nominal 1.2 V). This allows operation down to 1.43 V input, making it suitable for single-cell Li-ion and Li-poly battery applications throughout most of their discharge curve. The datasheet specifies maximum dropout of 540 mV under worst-case conditions.

Does TLV71312PDQNT require external capacitors to operate stably?

No, TLV71312PDQNT is explicitly designed for stable operation with zero output capacitance-eliminating the need for mandatory C_OUT. Input capacitance is optional but recommended (≤1 µF ceramic) for EMI suppression and inrush control. While stable without capacitors, adding a 1-µF ceramic C_OUT improves load transient response. This capacitor-free capability is verified across all operating conditions in the TLV71312PDQNT datasheet.

How does the foldback current limit function in TLV71312PDQNT?

In TLV71312PDQNT, the foldback current limit reduces output current during overload or short-circuit events: at V_OUT = 0 V, short-circuit current is limited to approximately 40 mA, significantly lower than the 180 mA peak current limit at nominal V_OUT. This foldback behavior minimizes power dissipation and thermal stress during faults. The feature is inherent to the TLV71312PDQNT's internal architecture and requires no external components.

Is active output discharge available on TLV71312PDQNT?

Yes, TLV71312PDQNT includes active output discharge via an internal 120-Ω pulldown resistor connected between OUT and GND when the device is disabled (EN < 0.4 V). This feature rapidly discharges the output node, preventing floating voltages that could cause latch-up or unintended behavior in downstream circuitry. The discharge time depends on output capacitance but is typically sub-millisecond for ≤1 µF loads.

What is the enable threshold voltage range for TLV71312PDQNT?

The TLV71312PDQNT enable pin (EN) has a guaranteed high threshold of ≥0.9 V and low threshold of ≤0.4 V at TJ = 25°C, with monotonic behavior across –40°C to 125°C. EN draws only 0.01 µA at 5.5 V, enabling direct interface with low-drive-strength microcontroller GPIOs without pull-up resistors. This precise threshold ensures reliable turn-on/turn-off control in battery-powered systems where supply rails may sag.