Texas Instruments TLV733285PDQNT

Overview

TLV733285PDQNT 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 fixed 2.85 V output with 125 mV dropout at 300 mA, ±1.4% output accuracy, and 34 µA quiescent current - deployed in smartphone power rails and camera module biasing.

For engineers reviewing the TLV733285PDQNT datasheet, TLV733285PDQNT pinout, TLV733285PDQNT application, or TLV733285PDQNT equivalent, this page delivers verified electrical specs, thermal behavior under load, EN-controlled enable/disable timing, active output discharge, and capacitor-free stability confirmation - all critical for battery-powered portable designs requiring minimal BOM count and fast transient response.

Technical Context

The TLV733285PDQNT 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, supported by foldback current limiting and thermal shutdown at 160°C.

It integrates an active pull-down circuit (120 Ω) on the OUT pin during disable, enabling rapid discharge of downstream loads. The EN pin features precise thresholds: VEN(HI) = 0.9 V (min), VEN(LO) = 0.35 V (max), with negligible EN pin current (0.01 µA typical), ensuring compatibility with low-voltage GPIOs.

Key Specifications

Pinout & Package

TLV733285PDQNT is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with exposed thermal pad electrically tied to GND. The compact footprint supports high-density PCB layouts in space-constrained mobile applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESA1 and MCP1804T-285I/OT, TLV733285PDQNT uniquely combines capacitor-free operation, active output discharge, and 125 mV dropout in a 1-mm² package - making it optimal for space- and battery-life-constrained consumer portables where external capacitors must be minimized.

Availability

TLV733285PDQNT is available at Aetrix Electronics and suitable for smartphone camera modules, wearable sensor hubs, tablet application processor rails, and industrial handheld scanners requiring stable component supply and long-term production continuity.

Supply support for TLV733285PDQNT 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 innovation focused on power efficiency, miniaturization, and system-level reliability.

The TLV733 series was designed specifically for portable consumer electronics demanding ultra-small footprints, capacitor-free simplicity, and robust protection - targeting next-generation smartphones, tablets, and wearables.

FAQ

Does TLV733285PDQNT require input or output capacitors to operate?

No, TLV733285PDQNT is explicitly designed for capacitor-free operation - it remains stable with zero input or output capacitance. However, adding a 1-µF ceramic capacitor on IN improves EMI immunity, and one on OUT enhances load transient response. The TLV733285PDQNT datasheet confirms stability across –40°C to +125°C without capacitors, eliminating BOM cost and board area in space-constrained designs.

What is the maximum junction temperature and thermal shutdown behavior of TLV733285PDQNT?

TLV733285PDQNT shuts down at approximately 160°C junction temperature and re-enables at ~140°C, providing 20°C hysteresis. Its RθJB is 164.9°C/W in the DQN package when the thermal pad is properly soldered to the PCB ground plane. For continuous 300 mA operation at 2.85 V, ensure VIN ≤ 4.0 V and ambient ≤ 60°C to maintain TJ < 125°C - the recommended maximum for long-term reliability.

How does the active output discharge function work in TLV733285PDQNT?

When TLV733285PDQNT is disabled (EN < 0.35 V), an internal 120 Ω pulldown switch connects the OUT pin to GND. This actively discharges downstream capacitance - for example, a 1-µF load decays to <100 mV in under 120 µs. This prevents floating voltages that could cause unintended wake-up or latch-up in sequenced power systems, eliminating the need for external discharge resistors.

Is TLV733285PDQNT compatible with 1.8 V GPIO enable signals?

Yes, TLV733285PDQNT's EN pin has VEN(HI) = 0.9 V (min) and VEN(LO) = 0.35 V (max), making it fully compatible with 1.8 V logic outputs. With only 0.01 µA EN pin current, it imposes negligible loading on microcontroller GPIOs. No level shifter is needed - direct connection from 1.8 V MCU pins ensures reliable turn-on/turn-off without additional components.

What protection features does TLV733285PDQNT include?

TLV733285PDQNT integrates four key protections: (1) foldback current limiting - reduces output current as VOUT drops during shorts; (2) thermal shutdown at 160°C with 20°C hysteresis; (3) undervoltage lockout (UVLO) disabling output until VIN > 1.3 V; and (4) active output discharge on disable. These features collectively prevent damage during faults while enabling autonomous recovery - critical for unattended portable devices.