Texas Instruments TLV741105PDBVR

Overview

TLV741105PDBVR from Texas Instruments is a 1.05-V fixed-output, 150-mA low-dropout linear regulator (LDO) with foldback current limit, active output discharge, and 1% DC 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 remains stable with a 1-µF ceramic output capacitor. It is used in battery-powered portable electronics requiring precise, low-noise, low-power voltage regulation.

For engineers reviewing the TLV741105PDBVR datasheet, TLV741105PDBVR pinout, TLV741105PDBVR application, or TLV741105PDBVR equivalent, key selection criteria include its 1.05-V fixed output, SOT-23-5 package compatibility, foldback overcurrent protection, active pulldown for fast output discharge, and suitability for space-constrained, low-quiescent-current designs.

Technical Context

The TLV741105PDBVR uses a PMOS pass transistor enabling ultra-low dropout and reverse-voltage blocking via its intrinsic body diode. Its internal UVLO disables output until VIN exceeds ~1.4 V, and its enable pin (active-high, 0.9 V threshold) controls startup/shutdown with 120-Ω active pulldown during disable.

It implements foldback current limiting-reducing output current as VOUT collapses during overload-and thermal shutdown (158°C trip, 140°C reset) to protect against sustained faults. Transient performance is optimized for 1-µF COUT and low-ESR ceramic capacitors.

Key Specifications

Pinout & Package

TLV741105PDBVR is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and exposed pad not connected internally. The package supports standard reflow and is compatible with automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and TPS706105DBVR, TLV741105PDBVR uniquely balances low IQ (50 µA), foldback current limiting, and active output discharge in a cost-optimized industrial-grade package - making it optimal for battery-powered portable devices where reliability, fast sequencing, and fault resilience matter more than automotive qualification or nanoamp quiescent current.

Availability

TLV741105PDBVR is available at Aetrix Electronics and suitable for wearable health monitors, ultra-low-power MCU core supplies, Bluetooth LE peripheral rails, and low-voltage FPGA configuration requiring stable component supply and consistent parametric performance across production batches.

Supply support for TLV741105PDBVR 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, signal chain components, and high-reliability solutions.

The TLV741P series was designed for space-constrained, battery-operated portable electronics needing low-noise, low-IQ, and foldback-protected LDO regulation - targeting applications like wearables, handheld sensors, and energy-harvesting nodes.

FAQ

What is the output voltage tolerance of TLV741105PDBVR over temperature?

The TLV741105PDBVR has a DC output accuracy of ±1% at TJ = 25°C and ±1.5% over the full operating junction temperature range of –40°C to +125°C. This specification applies specifically to the 1.05-V fixed-output version and ensures stable core voltage for low-power MCUs without requiring external trimming. The tolerance is guaranteed by TI's production test flow and is documented in Section 6.5 of the SBVS309A datasheet.

Does TLV741105PDBVR support active output discharge, and how does it work?

Yes, TLV741105PDBVR includes active output discharge. When the EN pin is driven below 0.4 V, an internal 120-Ω pulldown resistor connects the OUT pin to GND. This discharges external output capacitance quickly - the time constant depends on COUT and parallel load resistance. This feature prevents floating outputs and unintended logic states during shutdown, and is confirmed in the "Feature Description" section (7.3.2) of the TLV741P datasheet.

What is the minimum input voltage required for TLV741105PDBVR to regulate at 1.05 V?

The TLV741105PDBVR requires a minimum input voltage of 1.4 V to operate, but to maintain regulation at 1.05 V, VIN must exceed VOUT + VDO. At 150 mA, VDO is 230 mV, so VIN must be ≥1.28 V - however, the absolute minimum recommended VIN is 1.4 V per Recommended Operating Conditions (Section 6.3). Below 1.4 V, UVLO disables the output regardless of headroom.

Can TLV741105PDBVR be used with ceramic capacitors smaller than 1 µF?

No - TLV741105PDBVR is specified and tested for stability with ≥1 µF ceramic output capacitance (X5R/X7R dielectric). Using smaller values may cause oscillation or degraded transient response. The datasheet explicitly recommends "a small 1-µF ceramic capacitor" for best performance (Pin Functions table, Section 5), and TI's application notes confirm 1 µF is the minimum for guaranteed stability across all operating conditions.

Is TLV741105PDBVR pin-compatible with other TLV741P variants like TLV74118P or TLV74133P?

Yes - all TLV741P variants in the SOT-23-5 (DBV) package, including TLV741105PDBVR, TLV74118PDBVR, and TLV74133PDBVR, share identical pinout (IN, GND, EN, NC, OUT) and footprint. Output voltage is set internally during fabrication; no external resistors are involved. This allows direct substitution in layouts where only the output voltage differs - verified in the "Device Information" table and Pin Configuration diagrams (Sections 4 and 5) of the SBVS309A datasheet.