Texas Instruments TLV71312PDQNR

Overview

TLV71312PDQNR from Texas Instruments is a capacitor-free, 150-mA low-dropout linear regulator with fixed 1.2-V output, 1% accuracy, 230-mV dropout at full load, and 50-µA quiescent current-designed for power-sensitive portable devices such as handheld audio players and WLAN add-on cards.

For engineers reviewing the TLV71312PDQNR datasheet, TLV71312PDQNR pinout, TLV71312PDQNR application, or TLV71312PDQNR equivalent, key selection considerations include foldback current limiting, capacitor-free stability, ultra-low IQ, and X2SON package thermal performance in space-constrained battery-powered systems.

Technical Context

The TLV71312PDQNR implements a PMOS pass transistor architecture enabling stable operation without an output capacitor while maintaining fast line/load transient response. Its internal foldback current limit reduces output current to ~40 mA under short-circuit conditions, minimizing power dissipation during fault events.

It features undervoltage lockout (UVLO), active enable control with 0.9-V turn-on threshold, and integrated thermal shutdown at 158°C. The device operates across 1.4 V to 5.5 V input and delivers regulated 1.2 V ±1.5% over –40°C to 125°C junction temperature.

Key Specifications

Pinout & Package

TLV71312PDQNR is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with exposed thermal pad electrically tied to GND-optimized for minimal PCB area and enhanced thermal dissipation in thin-profile portable assemblies.

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, TLV71312PDQNR uniquely combines capacitor-free stability, foldback protection, and 50-µA IQ in a 1-mm² package-making it optimal for space- and power-constrained portable consumer electronics where reliability under fault conditions is essential.

Availability

TLV71312PDQNR is available at Aetrix Electronics and suitable for portable audio devices, WLAN add-on cards, industrial sensor nodes, and medical wearables requiring stable component supply with rapid fulfillment and consistent quality assurance.

Supply support for TLV71312PDQNR 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 high-reliability solutions.

The TLV713 series was developed specifically for battery-powered portable electronics, emphasizing capacitor-free operation, ultra-low quiescent current, and robust fault protection in miniature packages.

FAQ

Does TLV71312PDQNR require an output capacitor to operate?

No, TLV71312PDQNR is designed for stable operation with zero output capacitance-a key differentiator enabling minimal footprint designs. While optional 1-µF ceramic capacitors improve load transient response, they are not required for stability per TI's characterization across –40°C to 125°C. This capability is verified in the datasheet's "Stable Operation With or Without Capacitors" feature and Figure 16–18 transient waveforms.

What is the maximum input voltage rating for TLV71312PDQNR?

The absolute maximum input voltage for TLV71312PDQNR is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 5.5 V risks permanent damage, as specified in Section 6.1 Absolute Maximum Ratings. Operation at 5.5 V is valid only when ambient temperature and power dissipation remain within thermal limits defined by R_θJA = 255.8°C/W for the DQN package.

How does the foldback current limit function in TLV71312PDQNR?

In TLV71312PDQNR, foldback current limiting reduces output current to ~40 mA during short-circuit events-significantly lower than the 150-mA nominal rating. This behavior is confirmed in Figure 16 and 18 of the datasheet, where V_OUT collapses to ~0.2 V while I_OUT drops to 40 mA, limiting power dissipation and preventing thermal runaway. It activates automatically without external components.

Is TLV71312PDQNR pin-compatible with other variants in the TLV713 family?

Yes, all TLV713 X2SON (DQN) variants-including TLV71312PDQNR, TLV71318PDQNR, and TLV71333PDQNR-share identical 4-pin pinout and 1.0 mm × 1.0 mm footprint. This allows drop-in replacement across output voltages without PCB redesign, provided input/output voltage margins and load requirements are verified per each variant's electrical characteristics table.

What thermal performance can be expected from TLV71312PDQNR in a standard 2-layer PCB layout?

With the thermal pad of TLV71312PDQNR soldered to a 1-in² internal GND plane on a 2-layer FR-4 PCB, junction-to-board thermal resistance (R_θJB) is 208.2°C/W. At 150 mA output into 1.2 V, power dissipation is ~34.5 mW; this yields ~7.2°C junction-to-ambient rise above board temperature-well within safe operating limits up to 125°C junction temperature.