Texas Instruments TLV74110PDBVR

Overview

TLV74110PDBVR from Texas Instruments is a 150-mA, low-dropout linear regulator (LDO) with foldback current limit, designed for power-sensitive portable applications. It delivers 1.0-V fixed output at ±1% accuracy over –40°C to +125°C, achieves 230 mV dropout at 150 mA, consumes only 50 µA quiescent current, and remains stable with a 1-µF ceramic output capacitor. It is used in battery-powered microcontroller subsystems requiring precise, low-noise, low-quiescent-power regulation.

For engineers reviewing the TLV74110PDBVR datasheet, TLV74110PDBVR pinout, TLV74110PDBVR application, or TLV74110PDBVR equivalent, key selection criteria include its 1.0-V fixed output, SOT-23-5 package compatibility, active output discharge capability, foldback current limiting behavior, and thermal shutdown at 158°C - all critical for compact, thermally constrained, single-cell Li-ion or multi-cell alkaline designs.

Technical Context

The TLV74110PDBVR employs a PMOS pass transistor enabling ultra-low dropout and inherent reverse-voltage protection via its body diode. Its internal UVLO circuit disables regulation until VIN exceeds ~1.4 V, while an active high EN pin (VIH = 0.9 V min) controls startup and shutdown with integrated 120-Ω pulldown for rapid output discharge.

It features foldback current limiting that reduces output current as VOUT collapses during overload, delivering ~40 mA into short-circuit while limiting thermal stress. Combined with thermal shutdown (trip at 158°C, reset at 140°C), this enables robust fault handling without external circuitry in space-constrained portable systems.

Key Specifications

Pinout & Package

TLV74110PDBVR is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and exposed pad not present. Pin 4 is NC (no internal connection); thermal performance relies on PCB copper area connected to Pin 2 (GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV74110PDBVR, TPS70610DBVR offers lower quiescent current but omits foldback current limiting and active output discharge - increasing system-level design complexity for fault handling and power sequencing. TPL7407LPDQNR serves a fundamentally different function (multi-channel driver) and cannot replace the 1.0-V LDO functionality.

Availability

TLV74110PDBVR is available at Aetrix Electronics and suitable for wearable sensor nodes, BLE peripherals, industrial IoT edge sensors, and medical patch monitors requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for TLV74110PDBVR 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 for portable, industrial, and automotive markets.

The TLV741P family was designed to deliver high-performance, low-quiescent-current LDO regulation for space-constrained, battery-powered applications - emphasizing foldback protection, small capacitor compatibility, and thermal resilience.

FAQ

What is the output voltage tolerance of the TLV74110PDBVR over temperature?

The TLV74110PDBVR maintains ±1% DC output accuracy over the full operating junction temperature range of –40°C to +125°C for VOUT ≥1.2 V. Since its nominal output is 1.0 V, it meets ±20 mV absolute tolerance (–20 mV to +20 mV) across temperature - verified per Electrical Characteristics Table 6.5 in the SBVS309A datasheet. This ensures reliable operation for sub-1V logic cores without external trimming.

Does the TLV74110PDBVR support active output discharge, and how does it work?

Yes, the TLV74110PDBVR supports active output discharge. When the EN pin is driven below 0.4 V, the device enters shutdown mode and connects a 120-Ω internal pulldown resistor between OUT and GND. This discharges the output capacitor with a time constant dependent on COUT and parallel load resistance (τ ≈ 120·RL·COUT/(120+RL)), ensuring fast, controlled power-down - a key feature distinguishing the "P" variant of the TLV741P family.

What is the minimum input voltage required for the TLV74110PDBVR to regulate 1.0 V output?

The TLV74110PDBVR requires a minimum input voltage of 1.4 V to operate, per Recommended Operating Conditions. To maintain regulation at full 150 mA load, VIN must exceed VOUT + VDO = 1.0 V + 230 mV = 1.23 V - but the 1.4 V absolute minimum accounts for UVLO margin and line regulation. Below 1.4 V, the device enters undervoltage lockout and disables output regardless of EN state.

Can the TLV74110PDBVR be used with ceramic output capacitors smaller than 1 µF?

No - the TLV74110PDBVR 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 potential oscillation. The datasheet explicitly recommends "a small 1-µF ceramic capacitor" and confirms stability only at or above this value; deviation voids guaranteed performance.

How does the foldback current limit behave in the TLV74110PDBVR during a short-circuit event?

During a short-circuit, the TLV74110PDBVR's foldback current limit reduces output current as VOUT collapses - delivering ~40 mA typical into a dead short (VOUT = 0 V), rather than sustaining 150 mA. This lowers power dissipation [(VIN – VOUT) × ILIMIT] and delays thermal shutdown activation. The device cycles between current limit and thermal shutdown (trip at 158°C, reset at 140°C) if the fault persists - protecting both the LDO and upstream power source.