Texas Instruments TLV71310PDQNT

Overview

TLV71310PDQNT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with fixed 1.0-V output, 1% accuracy, 230 mV dropout at 150 mA, and 50 µA quiescent current-designed for space-constrained portable devices requiring stable low-voltage rail generation from single-cell Li-ion or Li-polymer batteries.

For engineers reviewing the TLV71310PDQNT datasheet, TLV71310PDQNT pinout, TLV71310PDQNT application, or TLV71310PDQNT equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for battery-powered PDA, MP3 player, and WLAN add-on card power management designs.

Technical Context

The TLV71310PDQNT implements a foldback current-limit protection architecture that reduces output current during overload to limit power dissipation and prevent thermal shutdown-critical for unattended operation in handheld devices. Its internal reference and error amplifier deliver ±1% DC output accuracy over –40°C to 125°C junction temperature.

This device operates stably without an output capacitor (capacitor-free mode) or with any ceramic output capacitor (0.1–100 µF), enabling minimal BOM count and PCB footprint. It features active output discharge via integrated pulldown resistor (120 Ω typical) and precise enable threshold (0.9 V high, 0.4 V low) for controlled sequencing.

Key Specifications

Pinout & Package

TLV71310PDQNT is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with wettable flanks and an exposed thermal pad electrically tied to GND-optimized for high-density portable PCBs and automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator applications.

Compared with TLS850F0TLE and MCP1700T-1002E/TT, TLV71310PDQNT uniquely balances capacitor-free operation, active discharge, and 150-mA capability in a 1-mm² X2SON package-making it optimal for consumer portable designs demanding minimal footprint, fast sequencing, and robust fault handling.

Availability

TLV71310PDQNT is available at Aetrix Electronics and suitable for WLAN add-on cards, portable MP3 players, PDAs, Bluetooth LE sensor nodes, and other battery-powered portable devices requiring stable component supply with rapid lead times and consistent quality.

Supply support for TLV71310PDQNT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, personal electronics, and communications markets.

The TLV713 series was developed specifically for power-sensitive portable electronics-emphasizing capacitor-free stability, ultra-low quiescent current, and foldback protection to extend battery life and improve system robustness in handheld devices.

FAQ

What is the dropout voltage specification for TLV71310PDQNT at full load?

The TLV71310PDQNT has a maximum dropout voltage of 230 mV at 150 mA output current and TJ = –40°C to 85°C. At 125°C junction temperature, the worst-case dropout rises to 540 mV. This allows the device to regulate a stable 1.0-V output down to an input voltage of 1.23 V under nominal conditions-critical for deep discharge operation of single-cell Li-ion batteries.

Does TLV71310PDQNT require external capacitors to operate stably?

No, TLV71310PDQNT is designed for stable operation without any output capacitor-a key differentiator enabling minimal solution size. It remains stable with any ceramic output capacitor from 0.1 µF to 100 µF if added for improved transient response or noise filtering. An input capacitor is optional but recommended for EMI suppression.

What is the function of the EN pin on TLV71310PDQNT, and what are its voltage thresholds?

The EN pin on TLV71310PDQNT controls regulator enable/disable state. It turns ON when voltage exceeds 0.9 V (min) and enters shutdown when voltage drops below 0.4 V (max). During shutdown, quiescent current falls to 0.1–1 µA. This logic-level interface allows direct connection to microcontroller GPIOs or power sequencers without level-shifting circuitry.

How does the foldback current limit work in TLV71310PDQNT, and what is its trip point?

TLV71310PDQNT employs foldback current limiting to reduce output current during overload or short-circuit events. The current limit is set at 180 mA (typical) under normal conditions, but folds back to ~40 mA when V_OUT collapses to 0 V. This protects the device and source supply from excessive power dissipation during sustained faults-verified across –40°C to 85°C.

Is TLV71310PDQNT compatible with other TLV713 family members in terms of pinout and footprint?

Yes, TLV71310PDQNT shares identical 4-pin X2SON (DQN) pinout and 1.0 mm × 1.0 mm footprint with all TLV713x PDQNT variants (e.g., TLV71318PDQNT, TLV71333PDQNT). This enables drop-in voltage option changes without PCB redesign-provided the EN and GND connections remain unchanged and thermal layout accommodates the specific output voltage's power dissipation profile.