Texas Instruments TPS610333DRLR

Overview

TPS610333DRLR from Texas Instruments is a fully-integrated synchronous boost converter optimized for fixed 5.0-V output in space-constrained portable devices. It operates from 1.8 V to 5.5 V input, delivers up to 2 A continuous output with 1.85-A typical valley current limit, achieves 90.78% efficiency at 3.3-V input/5-V output/2-A load, and features output discharge via PG pin. It targets battery-powered smart speakers and mobile POS terminals requiring low quiescent current and true input-output disconnection.

For engineers reviewing the TPS610333DRLR datasheet, TPS610333DRLR pinout, TPS610333DRLR application, or TPS610333DRLR equivalent, key selection criteria include its fixed 5-V output configuration, SOT583 8-pin package, 2.4-MHz switching frequency, 5.3-μA quiescent current into VOUT, and integrated output short-circuit and thermal shutdown protections.

Technical Context

The TPS610333DRLR uses adaptive constant on-time valley-current-control topology to regulate output voltage at 2.4 MHz, enabling compact LC filter design with 0.47-μH inductors. Its dual MOSFET power stage integrates 25-mΩ low-side and 46-mΩ high-side switches, supporting pass-through mode when VIN exceeds VOUT and implementing output discharge via open-drain PG pin with external RDummy resistor.

Light-load operation is configurable via MODE pin: forced PWM ensures consistent EMI profile, while auto PFM maximizes efficiency down to 5.3 μA VOUT quiescent current. The device includes ±1.5% reference accuracy over –40°C to +125°C, 5.75-V output overvoltage protection, and true input-output disconnection during shutdown with only 0.1-μA shutdown current.

Key Specifications

Pinout & Package

TPS610333DRLR is housed in a 2.1-mm × 1.6-mm SOT583 8-pin thermally enhanced package with exposed pad for improved heat dissipation and board-level reliability in high-density layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Compared with TPS61033DRLR, the TPS610333DRLR trades peak current capability for smaller solution size and simplified fixed-output design; versus TPS61291DRVR, it offers higher current, faster switching, and integrated output discharge - making it optimal for mid-power portable 5-V rails demanding controlled shutdown behavior.

Availability

TPS610333DRLR is available at Aetrix Electronics and suitable for smart speaker power management, mobile POS display backlighting, and tablet USB peripheral port regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS610333DRLR 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 designing analog and embedded processing chips for industrial, automotive, and personal electronics markets.

The TPS61033X family was developed to deliver high-efficiency, ultra-compact boost conversion for battery-powered portable devices requiring fixed or adjustable 5-V rails with advanced protection and sequencing features.

FAQ

What output voltage does the TPS610333DRLR provide, and how is it set?

The TPS610333DRLR provides a fixed 5.0-V output. Unlike the adjustable TPS61033, its FB pin is internally connected to VIN - no external resistor divider is used or permitted. This configuration ensures ±1.4% output accuracy across temperature and load, simplifying design for dedicated 5-V rail applications such as USB peripherals and display backlights.

Does the TPS610333DRLR support output discharge, and how is it implemented?

Yes, the TPS610333DRLR implements output discharge using its open-drain PG pin. When EN is pulled low, the PG pin transitions low after a 33-μs glitch filter delay, activating an external RDummy resistor between PG and VOUT. This creates a controlled discharge path, rapidly ramping VOUT toward 0 V - essential for safe system reset and sequencing compliance in portable devices.

What is the maximum continuous output current capability of the TPS610333DRLR?

The TPS610333DRLR has a typical valley current limit of 1.85 A, enabling up to 2 A continuous output current under typical conditions (e.g., 3.3-V input, 5-V output, 25°C ambient). Efficiency reaches 90.78% at this operating point. Output current is limited by thermal performance and PCB layout; the SOT583 package's RθJA of 117.5°C/W requires adequate copper pour for sustained 2-A operation.

How does the TPS610333DRLR manage light-load efficiency and EMI?

The TPS610333DRLR offers pin-selectable light-load operation: MODE = high forces constant-frequency PWM (2.4 MHz) for predictable EMI; MODE = low enables auto PFM mode, reducing switching frequency and achieving 5.3-μA quiescent current into VOUT. This dual-mode flexibility allows designers to prioritize either noise immunity or battery life based on system requirements.

What protections are integrated into the TPS610333DRLR?

The TPS610333DRLR integrates output overvoltage protection (5.75 V trip), thermal shutdown (170°C trip / 155°C recovery), output short-circuit limiting, undervoltage lockout (1.7-V rising threshold), and true input-output disconnection during shutdown. These features ensure robust operation in consumer and industrial portable equipment without requiring external protection circuitry.