Texas Instruments TLV71315PDBVR

Overview

TLV71315PDBVR 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 active output discharge. It operates from 1.4 V to 5.5 V input and delivers stable power to ultra-low-power microcontrollers and RF modules in space-constrained portable devices.

For engineers reviewing the TLV71315PDBVR datasheet, TLV71315PDBVR pinout, TLV71315PDBVR application, or TLV71315PDBVR equivalent, key selection criteria include its capacitor-free stability, foldback current limiting for short-circuit robustness, active pulldown for fast output discharge, and X2SON-4 package compatibility with high-density PCB layouts.

Technical Context

The TLV71315PDBVR implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces thermal stress during sustained overloads by lowering output current as voltage drops below regulation-critical for battery-powered systems where fault energy must be minimized.

Unlike traditional LDOs, it achieves stability without mandatory output capacitance due to an integrated compensation scheme, while remaining compatible with any ceramic capacitor (0–100 µF). The EN pin supports precise system-level power sequencing with 0.9 V enable threshold and sub-1 µA shutdown current.

Key Specifications

Pinout & Package

TLV71315PDBVR is packaged in a 1.0 mm × 1.0 mm, 4-pin X2SON (DQN) package with wettable flanks, optimized for automated optical inspection and high thermal performance via exposed thermal pad tied to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV71315PDBVR, TLV71315PDQNR trades miniaturization for assembly flexibility, while TPS7A0515PDBVR improves quiescent current at the expense of capacitor dependency and missing active discharge-making TLV71315PDBVR the optimal choice for size-, safety-, and reliability-constrained portable designs.

Availability

TLV71315PDBVR is available at Aetrix Electronics and suitable for wearable electronics, BLE sensor nodes, and portable medical diagnostics requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV71315PDBVR 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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management, signal chain, and microcontroller technologies.

The TLV713 series was designed specifically for portable, battery-powered applications demanding capacitor-free simplicity, foldback fault protection, and ultra-low quiescent current - targeting PDAs, handheld audio, and PC add-in cards in the early 2010s, now widely adopted in modern IoT edge nodes.

FAQ

Does TLV71315PDBVR require an output capacitor to operate?

No, TLV71315PDBVR is explicitly designed for stable operation with zero output capacitance, eliminating BOM cost and PCB area. However, adding a 1-µF ceramic capacitor improves load transient response and reduces output noise - especially beneficial in noise-sensitive analog or RF applications. The device remains stable across 0–100 µF output capacitance values.

What is the purpose of the active output discharge feature in TLV71315PDBVR?

The active output discharge in TLV71315PDBVR uses an internal 120-Ω pulldown resistor to rapidly drain charge from the output node when the EN pin is deasserted. This prevents floating voltages that could cause undefined logic states or unintended wake-up in downstream circuits - critical for reliable reset behavior in battery-powered systems like wearables and sensor beacons.

Can TLV71315PDBVR be used with a 1.2-V input supply?

No. TLV71315PDBVR has a minimum input voltage of 1.4 V per its recommended operating conditions. At 1.2 V input, the device cannot regulate 1.5 V output - it will either drop out completely or fail to enable. For sub-1.4 V operation, consider alternative architectures such as boost-then-LDO or specialized ultra-low-input LDOs not represented by the TLV71315PDBVR.

How does the foldback current limit in TLV71315PDBVR protect the system during a short circuit?

Under short-circuit conditions, TLV71315PDBVR reduces output current from 150 mA to ~40 mA as output voltage collapses - significantly lowering power dissipation (P = V × I) and preventing thermal runaway. This foldback behavior limits junction temperature rise, protects the IC and PCB traces, and preserves battery energy better than constant-current limiting, making it ideal for unattended portable devices.

Is TLV71315PDBVR pin-compatible with other variants in the TLV713 family?

Yes - all TLV713 X2SON-4 (DQN) variants, including TLV71315PDBVR, share identical pinout (IN, EN, OUT, GND) and package dimensions (1.0 mm × 1.0 mm). This allows direct substitution across output voltages (1.0 V to 3.3 V) and P/non-P versions without layout changes, provided thermal and electrical requirements of the replacement part are verified for the target application.