Texas Instruments TLV74111PDBVR

Overview

TLV74111PDBVR from Texas Instruments is a 1.1-V fixed-output, 150-mA low-dropout linear regulator (LDO) with foldback current limit, active output discharge, and 1% output accuracy. It operates from 1.4 V to 5.5 V input, delivers 230 mV dropout at 150 mA, consumes only 50 µA quiescent current, and stabilizes with a 1-µF ceramic output capacitor - ideal for space-constrained battery-powered microcontroller power rails.

For engineers reviewing the TLV74111PDBVR datasheet, TLV74111PDBVR pinout, TLV74111PDBVR application, or TLV74111PDBVR equivalent, key selection criteria include its SOT-23-5 package compatibility, 120-Ω active pulldown resistor for fast output discharge, foldback overcurrent protection limiting short-circuit current to 40 mA, and thermal shutdown at 158°C with hysteresis.

Technical Context

The TLV74111PDBVR uses a PMOS pass transistor enabling ultra-low dropout and inherent reverse-voltage blocking. Its internal UVLO disables regulation below ~1.4 V input, while the active-high EN pin (VIH = 0.9 V, VIL = 0.4 V) controls startup and shutdown with inrush current limiting.

It implements foldback current limiting - reducing output current as VOUT collapses during overload - and integrates a 120-Ω pulldown resistor tied to GND when disabled, ensuring rapid discharge of output capacitance. Thermal shutdown activates at 158°C and resets at 140°C, providing cyclic fault protection without external circuitry.

Key Specifications

Pinout & Package

TLV74111PDBVR is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and exposed pad not connected internally. Pin 4 is NC (no internal connection); thermal performance improves when the PCB ground plane connects to pins 2 (GND) and the exposed pad (electrically tied to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and TPS7A0511PDQNR, TLV74111PDBVR uniquely combines foldback current limiting, active 120-Ω output discharge, and 1% accuracy in a 5-pin SOT-23 - making it optimal for battery-sensitive, fast-wake embedded systems where controlled fault response and residual voltage elimination are mandatory.

Availability

TLV74111PDBVR is available at Aetrix Electronics and suitable for wearable sensor nodes, low-power MCU core rails, medical patch monitors, and industrial wireless sensors requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TLV74111PDBVR 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, precision analog, and low-power signal chain solutions.

The TLV741P family was designed specifically for ultra-low-power, space-constrained portable electronics - emphasizing minimal quiescent current, fast transient response, and robust fault protection in miniature packages like SOT-23 and X2SON.

FAQ

What is the output voltage tolerance of TLV74111PDBVR over temperature?

The TLV74111PDBVR provides ±1% output voltage accuracy at 25°C and ±1.5% over the full operating junction temperature range of –40°C to +125°C. This specification applies specifically to the 1.1-V fixed version and is verified under recommended operating conditions with 1-µF output capacitance and 1 mA to 150 mA load current.

Does TLV74111PDBVR require an input capacitor?

An input capacitor is not required for stability of TLV74111PDBVR, but Texas Instruments recommends a 0.1-µF to 1-µF ceramic capacitor from IN to GND to improve PSRR, reduce input ripple, and enhance transient response - especially when source impedance exceeds 0.5 Ω or the device is located remotely from the power source.

How does the foldback current limit function in TLV74111PDBVR?

In TLV74111PDBVR, foldback current limiting reduces output current as output voltage drops during overload - unlike constant-current limiters. At short-circuit, it delivers ~40 mA, minimizing power dissipation in the PMOS pass element and delaying thermal shutdown. This protects both the IC and the input source during sustained faults.

What is the purpose of the NC pin (Pin 4) on TLV74111PDBVR?

Pin 4 of TLV74111PDBVR is designated NC (No Connection) and has no internal bond wire or circuit connection. It must remain unconnected - neither routed nor soldered - to avoid mechanical stress, parasitic coupling, or potential latch-up. The SOT-23-5 package uses this pin position solely for mechanical symmetry and thermal pad alignment.

Can TLV74111PDBVR be used with output capacitance less than 1 µF?

No - TLV74111PDBVR is specified and characterized for stable operation only with ≥1 µF ceramic output capacitance (X5R/X7R dielectric). Using smaller values risks instability, excessive overshoot/undershoot during load transients, and failure to meet PSRR or noise specifications. TI explicitly states 1 µF as the minimum for reliable performance.