Texas Instruments TLV71315PDQNR

Overview

TLV71315PDQNR 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 rail generation.

For engineers reviewing the TLV71315PDQNR datasheet, TLV71315PDQNR pinout, TLV71315PDQNR application, or TLV71315PDQNR equivalent, key selection criteria include capacitor-free stability, thermal shutdown behavior (158°C trip), active output discharge capability (P-version only), and compatibility with 1.4 V to 5.5 V input sources in ultra-small X2SON packaging.

Technical Context

The TLV71315PDQNR 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 collapses-critical for battery safety in handheld systems.

It features an enable input with 0.9 V turn-on threshold and 0.4 V shutdown threshold, integrated undervoltage lockout, and stable operation without mandatory output capacitance-enabled by proprietary internal compensation that eliminates external COUT dependency while maintaining <100 µs startup time.

Key Specifications

Pinout & Package

TLV71315PDQNR is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON package with exposed thermal pad electrically tied to GND-optimized for minimal PCB area and enhanced thermal performance in high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71315PDQNR, TLV71715PDQNR trades capacitor-free operation for lower IQ, while MCP1700T-1502E/MB sacrifices dropout and protection for extreme quiescent savings-making TLV71315PDQNR optimal for space-constrained, safety-aware portable designs needing robustness without external components.

Availability

TLV71315PDQNR is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, industrial handheld scanners, smart home motion detectors, and portable medical diagnostics requiring stable component supply and long-term manufacturability.

Supply support for TLV71315PDQNR 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 innovation since 1930.

The TLV713 series was developed to address size and efficiency constraints in battery-powered portable electronics-delivering capacitor-free LDO performance with integrated protection for next-generation compact devices.

FAQ

What is the dropout voltage specification for TLV71315PDQNR at 150 mA load?

The TLV71315PDQNR has a maximum dropout voltage of 420 mV at 150 mA and TJ = –40°C to 125°C, with a typical value of 230 mV at TJ = –40°C to 85°C. This enables reliable 1.5-V regulation from inputs as low as 1.92 V across the full operating temperature range, making TLV71315PDQNR well-suited for single-cell battery applications where input voltage sags under load.

Does TLV71315PDQNR require an output capacitor to remain stable?

No, TLV71315PDQNR is designed for stable operation with or without an output capacitor-its internal compensation eliminates the need for mandatory COUT. While adding a 1-µF ceramic capacitor improves load transient response, TLV71315PDQNR maintains phase margin and avoids oscillation even with zero output capacitance, reducing bill-of-materials cost and PCB area in space-constrained designs.

What protection features does TLV71315PDQNR include?

TLV71315PDQNR integrates foldback overcurrent protection, thermal shutdown (158°C trip, 140°C reset), and undervoltage lockout. During overload, its foldback limit reduces output current as VOUT drops-limiting power dissipation. The thermal shutdown circuit disables the regulator above 158°C and re-enables it only after cooling to 140°C, preventing latch-up and ensuring safe recovery. These protections are intrinsic to TLV71315PDQNR and require no external components.

Is TLV71315PDQNR compatible with 1.8-V GPIO enable signals?

Yes, TLV71315PDQNR's EN pin has a guaranteed turn-on threshold of 0.9 V minimum and turn-off threshold of 0.4 V maximum, making it fully compatible with 1.8-V and 3.3-V microcontroller GPIOs without level-shifting. With only 0.01 µA EN pin current, TLV71315PDQNR imposes negligible loading on driving logic-enabling direct interface with low-power MCUs in battery-operated systems.

What is the purpose of the 'P' suffix in TLV71315PDQNR?

The 'P' in TLV71315PDQNR denotes the active output discharge variant: it includes an internal pulldown resistor (~120 Ω) that rapidly discharges the output capacitor when the device is disabled via the EN pin. This feature prevents floating or slowly decaying VOUT states that could cause downstream logic glitches or unintended wake-up events-making TLV71315PDQNR ideal for systems requiring clean, deterministic power sequencing.