Texas Instruments TLV71315PDQNT

Overview

TLV71315PDQNT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with fixed 1.5-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-voltage biasing of microcontrollers and RF front-ends.

For engineers reviewing the TLV71315PDQNT datasheet, TLV71315PDQNT pinout, TLV71315PDQNT application, or TLV71315PDQNT equivalent, key selection criteria include capacitor-free stability, thermal shutdown at 158°C, active output discharge (enabled by P-suffix), EN logic compatibility with 0.4-V/0.9-V thresholds, and X2SON-4 package suitability for high-density PCB layouts.

Technical Context

The TLV71315PDQNT implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent capacitor-free stability across temperature and load. Its foldback current limit reduces power dissipation during overload while maintaining safe junction temperatures up to 125°C.

It features an enable input with precise 0.4-V low threshold and 0.9-V high threshold, integrated thermal shutdown at 158°C (trip) / 140°C (release), and active pulldown (RPULLDOWN = 120 Ω at VIN = 4 V) for rapid output discharge-critical for sequencing in multi-rail systems.

Key Specifications

Pinout & Package

TLV71315PDQNT 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 automated optical inspection and thermal performance on 2-layer PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC71315PDBVR and MCP1700T-1502E/TT, TLV71315PDQNT uniquely combines capacitor-free stability, foldback current limiting, and active output discharge in a 1-mm² footprint-making it optimal for compact, sequenced, and fault-resilient portable designs.

Availability

TLV71315PDQNT is available at Aetrix Electronics and suitable for wearable health monitors, BLE sensor nodes, industrial handheld scanners, and smart home motion detectors requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV71315PDQNT 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 leader specializing in analog and embedded processing technologies, with decades of LDO design expertise and broad automotive, industrial, and personal electronics portfolio coverage.

The TLV713 series was engineered specifically for portable, battery-powered devices demanding minimal solution size, ultra-low IQ, and robust fault handling-targeting applications where capacitor elimination and fast output discharge directly impact form factor and system-level reliability.

FAQ

What is the maximum input voltage rating for TLV71315PDQNT?

The absolute maximum input voltage for TLV71315PDQNT is 6 V, but the recommended operating range is 1.4 V to 5.5 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings. For reliable operation with margin, keep VIN ≤ 5.5 V across all conditions including transients and ripple.

Does TLV71315PDQNT require an output capacitor to remain stable?

No, TLV71315PDQNT is explicitly designed for capacitor-free stability per its datasheet-no output capacitor is required for loop stability. However, adding a 1-µF ceramic capacitor improves load transient response and reduces output noise, especially under dynamic current steps.

What does the 'P' suffix in TLV71315PDQNT indicate?

The 'P' suffix denotes the active output discharge feature: TLV71315PDQNT integrates a 120-Ω pulldown resistor between OUT and GND when disabled (EN < 0.4 V), ensuring rapid discharge of output capacitance. Non-P versions (e.g., TLV71315DQNT) lack this function.

How does the foldback current limit behave in TLV71315PDQNT during a short circuit?

Under short-circuit (V_OUT ≈ 0 V), TLV71315PDQNT reduces output current to ~40 mA-significantly lower than its 150-mA rated limit. This foldback behavior lowers power dissipation (P = I × V ≈ 0 W), preventing thermal runaway and enabling safe, indefinite short-circuit survival without shutdown.

Can TLV71315PDQNT operate at –40°C ambient temperature?

Yes, TLV71315PDQNT is fully specified from –40°C to +125°C junction temperature. At –40°C ambient with typical PCB thermal resistance, it delivers full 150-mA output with 1% accuracy and maintains 230-mV dropout-validated across the entire temperature range in Electrical Characteristics tables.