Texas Instruments TLV71325PDQNT

Overview

TLV71325PDQNT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with fixed 2.5-V output, 1% accuracy, 230 mV dropout at full load, 50 µA quiescent current, and foldback overcurrent protection - designed for space-constrained portable devices requiring stable low-noise power.

For engineers reviewing the TLV71325PDQNT datasheet, TLV71325PDQNT pinout, TLV71325PDQNT application, or TLV71325PDQNT equivalent, key selection criteria include its capacitor-free stability, thermal shutdown (158°C), active output discharge capability, input voltage range (1.4 V to 5.5 V), and X2SON-4 package compatibility with high-density PCB layouts.

Technical Context

The TLV71325PDQNT implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces power dissipation during overload by lowering output current as voltage drops below regulation - critical for battery safety in handheld systems.

It features an enable input with precise 0.9 V turn-on threshold and 0.4 V shutdown threshold, integrated thermal shutdown at 158°C with 140°C hysteresis, and stable operation without external output capacitance - eliminating board area and BOM cost while maintaining <30 mV load regulation across 0–150 mA.

Key Specifications

Pinout & Package

The TLV71325PDQNT 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 footprint and enhanced thermal performance on compact PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71325PDQNT, TLV71725PDQNR offers lower quiescent current but sacrifices capacitor-free operation and active discharge; MCP1700T-2502E/TT provides extreme ultra-low I_Q but lacks foldback protection and thermal shutdown - making TLV71325PDQNT optimal for robust, high-density portable systems needing fault resilience and minimal footprint.

Availability

TLV71325PDQNT is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, and portable audio DAC power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV71325PDQNT 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 for portable and industrial applications.

The TLV713 series was developed to address space- and power-constrained portable electronics, delivering capacitor-free LDO performance with integrated protection and ultra-small packaging for next-generation wearables and IoT endpoints.

FAQ

What is the maximum input voltage rating for the TLV71325PDQNT?

The TLV71325PDQNT has an absolute maximum input voltage of 6 V, with recommended operating range from 1.4 V to 5.5 V. Exceeding 6 V risks permanent damage per JEDEC stress ratings. For reliable operation in Li-ion battery applications, the 5.5 V upper limit ensures compatibility with fully charged cells (4.2 V) plus transient spikes.

Does the TLV71325PDQNT require an output capacitor to remain stable?

No, the TLV71325PDQNT is explicitly designed for stable operation with or without an output capacitor - a key differentiator confirmed in TI's SBVS195F datasheet. This eliminates mandatory C_OUT, reducing solution size and cost. However, adding a 1-µF ceramic capacitor improves transient response if system-level load steps demand faster recovery.

What is the purpose of the active output discharge feature in the TLV71325PDQNT?

The active output discharge in the TLV71325PDQNT uses an internal ~120 Ω pulldown resistor to rapidly discharge the output node when the device is disabled via the EN pin. This prevents floating voltages that could cause undefined logic states or leakage in downstream circuitry - essential for clean power sequencing in microcontroller-based portable devices.

How does the foldback current limit function in the TLV71325PDQNT during a short-circuit event?

During a short circuit, the TLV71325PDQNT reduces output current from 150 mA to ~40 mA as V_OUT collapses - limiting power dissipation and preventing thermal runaway. This foldback behavior is intrinsic to the design and documented in Figure 16 of the datasheet, ensuring safe operation even under sustained fault conditions without external current-sense circuitry.

Can the TLV71325PDQNT operate with a 1.4-V input supply while delivering 2.5 V output?

No - the TLV71325PDQNT cannot regulate 2.5 V from a 1.4-V input due to dropout constraints. Its minimum input must exceed V_OUT + V_DO; at 150 mA, V_DO is 230 mV, so minimum valid input is 2.73 V. The 1.4 V rating is the absolute lower bound for survival, not functional operation - attempting regulation below dropout causes unregulated output collapse.