Texas Instruments TLV71320DQNT

Overview

TLV71320DQNT from Texas Instruments is a capacitor-free, 150-mA low-dropout linear regulator with fixed 2.0-V output, 1% accuracy, 230 mV dropout at 150 mA, and 50 µA quiescent current. It operates from 1.4 V to 5.5 V input and delivers stable power to ultra-low-power microcontrollers and RF subsystems in space-constrained portable devices.

For engineers reviewing the TLV71320DQNT datasheet, TLV71320DQNT pinout, TLV71320DQNT application, or TLV71320DQNT equivalent, key selection criteria include capacitor-free stability, foldback current limiting for battery protection, active discharge capability (P variant only), thermal shutdown at 158°C, and compatibility with 1-mm × 1-mm X2SON packaging for high-density PCB layouts.

Technical Context

The TLV71320DQNT implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces output current during overloads to minimize thermal stress and preserve battery charge - critical in single-cell Li-ion and coin-cell systems.

Unlike traditional LDOs, it achieves stability without mandatory output capacitance due to an integrated compensation scheme, while remaining compatible with optional 0.1–100 µF ceramic capacitors for enhanced transient response. The enable threshold (0.9 V high, 0.4 V low) supports direct interfacing with GPIOs of low-voltage MCUs.

Key Specifications

Pinout & Package

TLV71320DQNT uses the 4-pin X2SON (DQN) package, measuring 1.00 mm × 1.00 mm with 0.5-mm pitch. The exposed thermal pad is electrically connected to GND and must be soldered to a PCB ground plane for optimal thermal performance (R_θJB = 208.2°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC71320DBVR, TLV71320DQNT adds foldback protection and cuts IQ by 33%, enhancing battery safety and longevity; versus MCP1700T-2002E/MB, it trades ultra-low IQ for capacitor-free operation and lower dropout in tight spaces - making TLV71320DQNT optimal for miniaturized, battery-sensitive designs.

Availability

TLV71320DQNT is available at Aetrix Electronics and suitable for wearable health monitors, BLE sensor nodes, industrial handheld scanners, and portable medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV71320DQNT 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 TLV713 series was designed specifically for portable, battery-powered systems demanding ultra-low quiescent current, capacitor-free stability, and robust fault protection - targeting space-constrained consumer, medical, and IoT endpoints.

FAQ

What is the maximum input voltage rating for TLV71320DQNT?

The absolute maximum input voltage for TLV71320DQNT is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 6 V risks permanent damage per the Absolute Maximum Ratings table. For reliable long-term operation, maintain VIN ≤5.5 V, especially under high-temperature conditions where thermal stress compounds electrical overstress.

Does TLV71320DQNT require an output capacitor to operate stably?

No, TLV71320DQNT is explicitly designed for capacitor-free operation and remains stable with zero output capacitance. This is achieved through internal compensation - a key differentiator from most LDOs. An optional 1-µF ceramic capacitor may be added to improve load transient response, but it is never required for stability per TI's characterization and application guidance.

What is the dropout voltage of TLV71320DQNT at 100 mA output current?

At 100 mA output current and TJ = –40°C to 85°C, the dropout voltage of TLV71320DQNT is 350 mV (typical) to 575 mV (max) for 1.8–2.1 V output variants. Since TLV71320DQNT is a 2.0-V part, its specified dropout is 350 mV typical at 150 mA; at 100 mA, measured data shows ~280 mV typical, enabling reliable regulation down to ~2.28 V input under full load.

Is TLV71320DQNT pin-compatible with other variants in the TLV713 family?

Yes, all TLV713 X2SON (DQN) variants - including TLV71312DQNT, TLV71315DQNT, TLV71318DQNT, TLV71325DQNT, and TLV71333DQNT - share identical 4-pin pinout and 1.00 mm × 1.00 mm footprint. This allows voltage-scaling flexibility across designs without PCB rework, provided EN logic thresholds and thermal constraints remain compatible.

What thermal protection features does TLV71320DQNT include?

TLV71320DQNT incorporates thermal shutdown that activates at 158°C junction temperature and resets at 140°C. This hysteresis prevents oscillation during thermal overload. The device also features foldback current limiting, which reduces output current during shorts to ~40 mA - lowering power dissipation and complementing thermal protection. These dual mechanisms safeguard both the IC and the host system's power source.