Texas Instruments TLV75709PDBVR

Overview

TLV75709PDBVR from Texas Instruments is a 1A, low-quiescent-current (25μA typical), fixed 0.9V output LDO regulator in SOT-23-5 (DBV) package, supporting 1.45V–5.5V input and delivering ±1% output accuracy with 425mV max dropout at 1A - designed for powering low-voltage MCU cores and I/O rails in space-constrained portable electronics.

For engineers reviewing the TLV75709PDBVR datasheet, TLV75709PDBVR pinout, TLV75709PDBVR application, or TLV75709PDBVR equivalent, key selection considerations include its ultra-low IQ, thermal-pad-free SOT-23-5 footprint, active output discharge, foldback current limiting, and stability with only 1µF ceramic output capacitance.

Technical Context

The TLV75709PDBVR uses a PMOS pass transistor architecture enabling low dropout and high PSRR (45dB @ 100kHz), with integrated undervoltage lockout (UVLO: 1.21–1.44V), thermal shutdown (165°C trip), and enable-controlled soft-start. Its internal bandgap reference and error amplifier deliver 1% output accuracy across –40°C to +125°C junction temperature.

It operates in three defined functional modes: normal regulation (VIN ≥ VOUT + VDO), dropout (VIN < VOUT + VDO, output tracks input), and disabled (EN < 0.3V, active pulldown via 120Ω switch). The device features foldback current limiting that reduces output current as VOUT collapses toward GND during short-circuit events.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9mm × 2.8mm body, no exposed thermal pad, standard lead pitch, RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC75709DBVR and MCP1700T-0902E/TT, TLV75709PDBVR uniquely combines 1A output, 25μA IQ, active discharge, and 425mV dropout in a standard SOT-23-5 - making it optimal for next-generation ultra-low-power embedded processors where size, efficiency, and startup control are critical.

Availability

TLV75709PDBVR is available at Aetrix Electronics and suitable for portable medical devices, industrial wireless sensors, smart home controllers, and automotive body electronics requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TLV75709PDBVR 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 specializing in analog, embedded processing, and connectivity technologies, with decades of LDO design expertise and broad automotive/industrial qualification.

The TLV757P series was engineered for ultra-small, battery-sensitive applications demanding high accuracy, low IQ, and minimal external components - targeting portable electronics, wearables, and distributed sensor nodes.

FAQ

What is the maximum input voltage rating for TLV75709PDBVR?

The absolute maximum input voltage for TLV75709PDBVR is 6.0V. Operation above this risks permanent damage. The recommended operating range is 1.45V to 5.5V, ensuring reliable regulation and thermal performance across all load conditions and temperatures.

Does TLV75709PDBVR require an external pull-up resistor on the EN pin?

No. TLV75709PDBVR includes an internal pull-down resistor (120Ω) on the EN pin. An external pull-up is unnecessary unless the host system requires precise timing control or failsafe default-off behavior independent of VIN sequencing.

Can TLV75709PDBVR operate with less than 1µF output capacitance?

No. TLV75709PDBVR is specified and tested for stability with ≥1µF ceramic output capacitance. Using smaller values may cause oscillation or poor transient response. The minimum effective capacitance at the OUT pin must remain ≥0.47µF after DC bias derating.

What is the thermal resistance (RθJA) of TLV75709PDBVR in its SOT-23-5 package?

The JEDEC-standard RθJA for TLV75709PDBVR in the DBV (SOT-23-5) package is 231.1°C/W. On a typical 2-layer evaluation board (LP087A), RθJA measures 100.8°C/W. Layout with copper pour and thermal vias significantly improves thermal performance.

How does the foldback current limit behave during a short-circuit event on TLV75709PDBVR?

During a short circuit, TLV75709PDBVR initially delivers ~755mA (ISC), then folds back current as VOUT collapses below 0.4×0.9V = 0.36V. This reduces power dissipation in the PMOS pass element and delays thermal shutdown, enabling safer fault recovery than brick-wall limiting.