Texas Instruments TLV71315PDBVT

Overview

TLV71315PDBVT from Texas Instruments is a capacitor-free, 150-mA, low-dropout linear regulator with active output discharge, fixed 1.5-V output, 1% accuracy, 230 mV dropout at 150 mA, and 50 µA quiescent current-designed for power-sensitive portable devices such as Bluetooth headsets and wearable sensors.

For engineers reviewing the TLV71315PDBVT datasheet, TLV71315PDBVT pinout, TLV71315PDBVT application, or TLV71315PDBVT equivalent, key selection criteria include foldback current limiting, capacitor-free stability, active pulldown capability, input voltage range (1.4 V to 5.5 V), and thermal shutdown at 158°C.

Technical Context

The TLV71315PDBVT implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its internal foldback current limit reduces output current during overloads to minimize power dissipation and thermal stress.

Unlike traditional LDOs, it achieves stability without an output capacitor via internal compensation, while remaining compatible with external COUT up to 100 µF. The P-suffix variant integrates a 120-Ω active pulldown resistor on the OUT pin for rapid discharge of load capacitance during shutdown.

Key Specifications

Pinout & Package

TLV71315PDBVT is packaged in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm with exposed thermal pad electrically tied to GND. The thermal pad must be soldered to a PCB ground plane for optimal thermal performance (R_θJB = 76.7°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F1BTTA and MCP1702T-1502E/MB, the TLV71315PDBVT uniquely combines capacitor-free stability, foldback current limiting, and active output discharge in a 5-pin SOT-23 package-making it optimal for compact, battery-powered consumer electronics requiring robust transient response and safe power sequencing.

Availability

TLV71315PDBVT is available at Aetrix Electronics and suitable for Bluetooth audio devices, medical wearables, industrial wireless sensors, and smart home motion detectors requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TLV71315PDBVT 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and consumer market reach.

The TLV713 series was developed specifically for portable, battery-powered applications demanding ultra-low quiescent current, small solution size, and robust protection features-targeting space- and power-constrained edge devices.

FAQ

What is the maximum input voltage rating for TLV71315PDBVT?

The TLV71315PDBVT has an absolute maximum input voltage rating of 6 V, but its recommended operating input voltage range is 1.4 V to 5.5 V. Operation above 5.5 V risks permanent damage, while operation below 1.4 V may prevent regulation due to insufficient headroom for the 230-mV dropout at full load. This range supports direct connection to single-cell Li-ion batteries throughout their discharge cycle.

Does TLV71315PDBVT require an output capacitor to maintain stability?

No, TLV71315PDBVT is designed for stable operation with zero output capacitance, eliminating the need for COUT in space-constrained designs. It remains stable with any ceramic output capacitor from 0.1 µF to 100 µF if added for improved transient response or noise filtering. This capacitor-free capability is intrinsic to its internal compensation architecture-not a conditional feature dependent on external components.

How does the foldback current limit function in TLV71315PDBVT?

The TLV71315PDBVT implements foldback current limiting to reduce output current during overloads: under short-circuit conditions (VOUT ≈ 0 V), output current drops to approximately 40 mA, significantly lowering power dissipation and junction temperature rise. This behavior is confirmed in Figure 16 of the datasheet and protects both the regulator and PCB traces during fault conditions without requiring external current-sense circuitry.

What is the purpose of the NC pin on TLV71315PDBVT?

The NC (No Connect) pin (Pin 4) on TLV71315PDBVT has no internal bond wire or circuit connection. It must remain unconnected in the PCB layout; grounding or routing signals to this pin is not recommended and may compromise thermal performance or ESD robustness. Its presence accommodates mechanical compatibility with other variants in the TLV713 family using the same DBV package footprint.

Can TLV71315PDBVT operate at –40°C ambient temperature?

Yes, TLV71315PDBVT is fully specified and guaranteed to operate across –40°C to +125°C junction temperature. At –40°C ambient with typical PCB copper area, its thermal resistance (R_θJA = 249°C/W) ensures safe operation up to ~100 mA load before reaching 125°C junction limit. The device's ±1.5% output accuracy and 230-mV dropout hold across this full range, making it suitable for outdoor and industrial deployments.