Texas Instruments TLV733285PDQNR

Overview

TLV733285PDQNR from Texas Instruments is a capacitor-free, 300-mA low-dropout linear regulator (LDO) in a 1.0-mm × 1.0-mm X2SON-4 package, delivering 2.85 V output with ±1.4% accuracy, 125 mV dropout at 300 mA (V_OUT = 3.3 V), and 34 µA quiescent current. It enables compact, reliable power for battery-sensitive subsystems such as camera modules and WLAN add-on cards.

For engineers reviewing the TLV733285PDQNR datasheet, TLV733285PDQNR pinout, TLV733285PDQNR application, or TLV733285PDQNR equivalent, key selection criteria include capacitor-free stability, active output discharge, foldback current limiting, thermal shutdown behavior, and EN pin threshold compatibility with 1.8-V/3.3-V logic interfaces.

Technical Context

The TLV733285PDQNR uses a PMOS pass transistor architecture with undervoltage lockout (UVLO) activation at 1.3 V (rising) and deactivation at 1.25 V (falling), ensuring clean startup and brownout recovery. Its enable circuitry accepts 0.9 V (min) high-level and 0.35 V (max) low-level thresholds, supporting direct connection to microcontroller GPIOs without level shifting.

It implements foldback current limiting-reducing output current as V_OUT collapses-to protect during short-circuit events, with typical short-circuit current of 170 mA at 3.3 V output and thermal shutdown triggered at 160 °C (reset at 140 °C). The device remains stable with or without external capacitors, eliminating inrush current and minimizing solution size.

Key Specifications

Pinout & Package

TLV733285PDQNR is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with an exposed thermal pad electrically tied to GND. The package supports high-density PCB layouts and provides low thermal resistance (R_θJB = 164.9 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC733285PDQNR and TPS733285PDQNR, TLV733285PDQNR delivers the lowest quiescent current and fastest discharge, making it optimal for portable, battery-dependent systems requiring tight power budgeting and precise power-state transitions.

Availability

TLV733285PDQNR is available at Aetrix Electronics and suitable for camera modules, WLAN add-on cards, portable industrial sensors, and smartphone subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TLV733285PDQNR 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 and embedded processing technologies, with decades of LDO design expertise and broad automotive, industrial, and consumer qualification coverage.

The TLV733 series was engineered for ultra-compact, capacitor-free power delivery in space- and energy-constrained portable electronics - prioritizing low IQ, fast transient response, and robust fault protection without external components.

FAQ

What is the dropout voltage of TLV733285PDQNR at full 300-mA load?

The TLV733285PDQNR has a dropout voltage of 125 mV at 300 mA when V_OUT = 3.3 V. For its nominal 2.85-V output, the datasheet specifies dropout values per output voltage bin: at 2.85 V, the typical dropout is ≤260 mV (–40°C to +85°C) and ≤290 mV (–40°C to +125°C). This allows reliable operation from a 3.11-V minimum input across temperature.

Does TLV733285PDQNR require input or output capacitors for stability?

No, TLV733285PDQNR uses a capacitor-free architecture and is stable with or without external input or output capacitors. This eliminates inrush current at startup and reduces PCB area. However, a 1-µF ceramic capacitor on OUT is recommended for improved transient response in dynamic load applications - and the device remains stable if added.

How does the enable pin (EN) of TLV733285PDQNR interface with common logic families?

The EN pin of TLV733285PDQNR is active-high with V_EN(HI) ≥ 0.9 V (min) and V_EN(LO) ≤ 0.35 V (max), making it directly compatible with 1.8-V and 3.3-V CMOS outputs. No pull-up resistor is needed, and EN leakage is only 0.01 µA - ideal for low-power microcontroller GPIO control without loading the driver.

What protection features does TLV733285PDQNR include?

TLV733285PDQNR integrates foldback current limiting, thermal shutdown (trip at 160 °C, reset at 140 °C), undervoltage lockout (UVLO rising at 1.3 V), and active output discharge via a 120-Ω pulldown. These features collectively prevent damage during shorts, overtemperature, brownout, and uncontrolled power-down sequences - all without external components.

Can TLV733285PDQNR be used in automotive applications?

TLV733285PDQNR is qualified for industrial temperature range (–40°C to +125°C junction), meeting many under-dash and infotainment requirements. For AEC-Q100 Grade 2 (–40°C to +105°C ambient) or Grade 1 (–40°C to +125°C ambient) applications, TI offers the pin-compatible TLC733285PDQNR variant - which shares identical electrical specs but adds automotive qualification and extended reliability testing.