Product details

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
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
SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6
  • 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
  • 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

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.

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) 16 Apr 2021
User guide TPS54302 Step-Down Converter Evaluation Module User's Guide (Rev. B) 11 Oct 2021
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Using the TPS54x02 to Create an Inverting Power Supply 15 Jun 2018
Application note SOT23 Package Thermal Consideration 02 Mar 2018
Technical article Upgrade your TO-220 linear regulator with a pin-compatible buck power module 22 Sep 2017
Technical article Use an ULQ buck regulator for energy-efficient power products 12 Sep 2017
Application note How to Design a Thermally-Efficient Integrated BLDC Motor Drive PCB (Rev. A) 05 Feb 2017

Design & development

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

Evaluation board

TPS54302EVM-716 — TPS54302 Synchronous Step-Down Converter Evaluation Module

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 (...)

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Simulation model

TPS54302 Unencrypted PSpice Transient Model (Rev. A)

SLVMBL9A.ZIP (103 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

PMP40937 — 4s battery charger reference design

This reference design is for 4-cell battery charging applications such as vacuum robot or robotic lawn mower, etc. It employs the buck battery charger BQ25672 with a wide input and output range for 1-4 cell battery charging. External ship FET is introduced to minimize the battery leakage current (...)
Reference designs

TIDA-010055 — Non-isolated power architecture with diagnostics reference design for protection relay modules

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 (...)
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SOT-23-THIN (DDC) 6 View options

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