Texas Instruments TLV71712PDQNR

Overview

TLV71712PDQNR from Texas Instruments is a 150-mA, low-dropout linear regulator with 1.2 V fixed output, 215 mV dropout at full load, 0.5% typical output accuracy, 35 µA quiescent current, and foldback current limiting. It delivers stable power to RF-sensitive subsystems in portable electronics where low noise and minimal input-output headroom are critical.

For engineers reviewing the TLV71712PDQNR datasheet, TLV71712PDQNR pinout, TLV71712PDQNR application, or TLV71712PDQNR equivalent, key selection criteria include its 1-mm × 1-mm X2SON package, active pulldown discharge, 0.1 µF minimum stable output capacitance, UVLO (1.6 V), and enable threshold compatibility with low-voltage GPIOs.

Technical Context

The TLV71712PDQNR uses a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking via the body diode. Its foldback current limit initiates near 350 mA and reduces short-circuit current to 40 mA, minimizing thermal stress during faults.

It integrates an undervoltage lockout (UVLO) circuit that holds output disabled until VIN exceeds 1.6 V, and features an active pulldown resistor (120 Ω) to rapidly discharge the output capacitor when disabled - critical for sequencing and fast power-down in battery-powered systems.

Key Specifications

Pinout & Package

TLV71712PDQNR 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 MCP1700T-1202E/TT, TLV71712PDQNR uniquely balances ultra-small size, active discharge, foldback protection, and RF-grade PSRR - making it optimal for space-constrained, battery-powered, and RF-sensitive applications where all four attributes are simultaneously required.

Availability

TLV71712PDQNR is available at Aetrix Electronics and suitable for wearable health sensors, Bluetooth LE audio transceivers, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV71712PDQNR 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.

The TLV717P series was developed specifically for portable, battery-powered applications demanding ultra-low quiescent current, small footprint, and robust fault protection - targeting next-generation wearables, IoT edge nodes, and medical sensors.

FAQ

What is the minimum input voltage required for TLV71712PDQNR to regulate 1.2 V output?

The TLV71712PDQNR requires a minimum input voltage of 1.415 V to maintain regulation - calculated as VOUT + VDO = 1.2 V + 0.215 V. Below this, the device enters dropout mode where output tracks input minus dropout voltage. The undervoltage lockout (UVLO) threshold is 1.6 V, so regulation only begins once VIN exceeds that level.

Does TLV71712PDQNR require an external pull-up resistor on the EN pin?

No, TLV71712PDQNR does not require an external pull-up resistor on the EN pin. Its EN pin draws only 0.01 µA and has a logic-high threshold of 0.9 V (min), allowing direct connection to low-drive GPIOs. If shutdown functionality is unnecessary, EN may be tied directly to IN - a common practice in space-constrained designs using TLV71712PDQNR.

Can TLV71712PDQNR operate stably with a 0.1 µF output capacitor?

Yes, TLV71712PDQNR is explicitly designed to be stable with an effective output capacitance of 0.1 µF or greater - verified across temperature and bias conditions. TI recommends X5R or X7R ceramic capacitors rated ≥1 µF to ensure the effective capacitance remains ≥0.1 µF under operating voltage and temperature derating. A 0.1 µF *rated* capacitor is insufficient due to dielectric loss.

What is the purpose of the active pulldown feature in TLV71712PDQNR?

The active pulldown feature in TLV71712PDQNR uses an internal 120 Ω resistor between OUT and GND to rapidly discharge the output capacitor when the device is disabled (EN < 0.4 V). This prevents residual voltage hold-up, ensures predictable power-down sequencing, and avoids unintended wake-up of downstream circuitry - a critical requirement in battery-powered TLV71712PDQNR applications like wearables and medical sensors.

How does the foldback current limit in TLV71712PDQNR improve system reliability?

The foldback current limit in TLV71712PDQNR reduces output current as output voltage collapses during overload or short-circuit events - throttling from ~350 mA down to 40 mA (typical short-circuit current). This lowers power dissipation [(VIN – VOUT) × ILIMIT] in the PMOS pass element, preventing thermal runaway and enabling safe, sustained fault operation without external current-limiting components - enhancing robustness in TLV71712PDQNR-based portable systems.