Texas Instruments TLV733285PDBVR

Overview

TLV733285PDBVR from Texas Instruments is a capacitor-free, 300-mA, low-dropout linear regulator (LDO) in a 1-mm × 1-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 serves as a primary power rail for low-voltage microcontrollers and sensors in space-constrained portable electronics.

For engineers reviewing the TLV733285PDBVR datasheet, TLV733285PDBVR pinout, TLV733285PDBVR application, or TLV733285PDBVR equivalent, key selection criteria include capacitor-free stability, active output discharge, foldback overcurrent protection, EN pin logic thresholds (VEN(HI) = 0.9 V, VEN(LO) = 0.35 V), and thermal shutdown behavior at 160°C.

Technical Context

The TLV733285PDBVR uses a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking. Its capacitor-free design eliminates mandatory output capacitance while maintaining stability across –40°C to +125°C junction temperature.

Functional modes include normal regulation, dropout operation (where V_OUT = V_IN – V_DO), and disabled state with active 120-Ω pull-down on OUT. UVLO engages below 1.25 V (falling) and releases above 1.3 V (rising), preventing erratic startup.

Key Specifications

Pinout & Package

TLV733285PDBVR is housed in a 1.0 mm × 1.0 mm, 4-pin X2SON package (DQN) with exposed thermal pad electrically tied to GND. The compact footprint targets 0201-class board area constraints in wearables and IoT edge nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F2BHTSA1 and MCP1703T-2852E/MB, TLV733285PDBVR uniquely combines capacitor-free stability, active output discharge, and 1.0 mm × 1.0 mm X2SON packaging-enabling smallest possible solution size for consumer and industrial portable designs without compromising protection or transient response.

Availability

TLV733285PDBVR is available at Aetrix Electronics and suitable for wearable health sensors, BLE peripheral modules, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV733285PDBVR 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 personal electronics portfolios.

The TLV733 series was engineered specifically for space- and power-constrained portable electronics, emphasizing capacitor-free operation, ultra-low I_Q, and robust fault protection in sub-1-mm² packages.

FAQ

What is the dropout voltage specification for TLV733285PDBVR at full load?

The TLV733285PDBVR has a maximum dropout voltage of 270 mV at 300 mA output current and –40°C to +85°C ambient temperature. At +125°C, this increases to 290 mV. This value reflects the minimum headroom required between input and output to maintain regulation at 2.85 V - enabling use with partially discharged 3.3 V Li-ion cells down to ~3.12 V.

Does TLV733285PDBVR require external capacitors for stability?

No, TLV733285PDBVR is designed for capacitor-free operation and remains stable without mandatory input or output capacitors. However, a 1-µF ceramic capacitor on OUT improves transient response, and a 100-nF ceramic on IN enhances high-frequency noise rejection - both are optional per TI's recommended layout guidelines.

How does the enable pin (EN) function on TLV733285PDBVR?

The EN pin on TLV733285PDBVR is active-high with V_EN(HI) = 0.9 V (min) and V_EN(LO) = 0.35 V (max). Driving EN above 0.9 V enables regulation; pulling it below 0.35 V disables the device and activates the 120-Ω output pull-down. No internal pull-up or pull-down resistor exists, so external logic must drive EN definitively.

What protection features are integrated into TLV733285PDBVR?

TLV733285PDBVR integrates foldback overcurrent protection (limiting short-circuit current to ~150–170 mA depending on V_OUT), thermal shutdown (trip at ~160°C, reset at ~140°C), undervoltage lockout (UVLO rising at 1.3 V), and active output discharge. These features operate autonomously without external components, enhancing system reliability in unattended deployments.

Can TLV733285PDBVR be used in automotive applications?

TLV733285PDBVR is not AEC-Q100 qualified and lacks automotive-specific features like watchdog timers or extended temperature validation beyond +125°C junction. While it operates from –40°C to +125°C, it is intended for commercial and industrial portable electronics - not safety-critical automotive subsystems. For automotive use, consider TI's TLV733-Q1 or Infineon's TLS850F series instead.