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TPS54302

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4.5-V to 28-V Input, 3-A Output, EMI Friendly Synchronous Step-Down Converter

Data sheet
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4.5-V to 28-V Input, 3-A Output, EMI Friendly Synchronous Step-Down Converter

TPS54302

ACTIVE
Data sheet Order now

Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 28 Vout (Min) (V) 0.6 Vout (Max) (V) 26 Iout (Max) (A) 3 Iq (Typ) (uA) 40 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 400 Features Enable, Light Load Efficiency, Pre-Bias Start-Up, Spread Spectrum, Synchronous Rectification, UVLO Adjustable, Soft Start Fixed Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6 open-in-new Find other Buck converters (integrated switch)

Features

  • 4.5-V to 28-V wide input voltage range
  • Integrated 85-mΩ and 40-mΩ MOSFETs for 3-A, continuous output current
  • Low 2-µA shutdown, 45-µA quiescent current
  • Internal 5-ms soft start
  • Fixed 400-kHz switching frequency
  • Frequency spread spectrum to reduce EMI
  • Advanced Eco-mode™ pulse skip
  • Peak current-mode control
  • Internal loop compensation
  • Overcurrent protection for both MOSFETs with hiccup mode protection
  • Overvoltage protection
  • Thermal shutdown
  • SOT-23 (6) package

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Description

The TPS54302 device is a 4.5-V to 28-V input voltage range, 3-A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation, and 5-ms internal soft start to reduce component count.

By integrating the MOSFETs and employing the SOT-23 package, the TPS54302 device achieves the high power density and offers a small footprint on the PCB.

Advanced Eco-mode implementation maximizes the light load efficiency and reduces the power loss.

In the TPS54302 device, the frequency spread spectrum operation is introduced for EMI reduction.

Cycle-by-cycle current limit in both high-side MOSFET protects the converter in an overload condition and is enhanced by a low-side MOSFET freewheeling current limit which prevents current runaway. Hiccup mode protection is triggered if the overcurrent condition has persisted for longer than the present time.

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Technical documentation

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Type Title Date
* Data sheet TPS54302 4.5-V to 28-V Input, 3-A Output, EMI-Friendly Synchronous Step-Down Converter datasheet (Rev. B) Apr. 16, 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Using the TPS54x02 to Create an Inverting Power Supply Jun. 15, 2018
Application note SOT23 Package Thermal Consideration Mar. 02, 2018
Technical article Upgrade your TO-220 linear regulator with a pin-compatible buck power module Sep. 22, 2017
Technical article Use an ULQ buck regulator for energy-efficient power products Sep. 12, 2017
Application note How to Design a Thermally-Efficient Integrated BLDC Motor Drive PCB (Rev. A) Feb. 05, 2017
User guide TPS54302EVM-716 3-A Regulator Evaluation Module User's Guide (Rev. A) Oct. 10, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The TPS54302EVM-716 is a fully assembled and tested circuit for evaluating the TPS54302 synchronous step-down SWIFT™ converter. The EVM converts a 8-V to 28-V input voltage to a regulated 5-V output voltage that delivers up to 3 A. The TPS54302 delivers 40-μA ultra-low quiescent supply (...)

Features
  • 8-V to 28-V input voltage range
  • 40-μA ultra-low quiescent supply current (IQ)
  • 95.57% efficiency (VIN = 12 V, IO = 1 A)
  • 0.6-V internal voltage reference
  • 2-μA shutdown quiescent current
  • High efficiency at light loads with pulse-skipping eco-mode
  • Monotonic start-up into pre-biased outputs
  • Synchronous (...)
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Design tools & simulation

SIMULATION MODEL Download
SLVMBL9A.ZIP (103 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
View details

Reference designs

REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23-THIN (DDC) 6 View options

Ordering & quality

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  • Ongoing reliability monitoring

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