4.5-V to 24-V input, 3-A output synchronous buck converter


Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 24 Vout (Min) (V) 0.8 Vout (Max) (V) 16 Iout (Max) (A) 3 Iq (Typ) (uA) 93 Switching frequency (Min) (kHz) 500 Switching frequency (Max) (kHz) 500 Features Enable, Light Load Efficiency, Synchronous Rectification, 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)


  • Input voltage range: 4.5 V to 24 V
  • Output voltage range: 0.8 V to 16 V
  • 3-A maximum continuous output current
  • Fixed 500-kHz switching frequency
  • Support up to 97% duty cycle
  • Integrated 70-mΩ and 35-mΩ MOSFETs
  • Typical 3-µA shutdown current
  • Typical 98-µA quiescent current
  • Internal 5-ms soft-start
  • Internal loop compensation for ease use
  • Cycle-by-cycle current limit for both high-side and low-side MOSFETs
  • Non-latched UVP, UVLO and TSD protections
  • SOT-23 (6) package
  • Create a custom design using TPS56339 with the WEBENCH® Power Designer

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The TPS56339 is a 4.5-V to 24-V input voltage range, 3-A synchronous buck converter. The device includes two integrated switching MOSFETs, internal loop compensation and 5-ms internal soft-start to reduce component count. By employing the SOT-23 (6) package, the device achieves the high power density and offers small footprint on PCB.

The TPS56339 employs Advanced Emulated Current Mode (AECM) control that can get fast transient response with fixed frequency. The internal adaptive loop adjustment eliminates the need for external compensation over a wide voltage output range.

Cycle-by-cycle current limit on the high-side protects the device in current overload conditions and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection will be triggered under undervoltage and thermal shutdown protections.

open-in-new Find other Buck converters (integrated switch)

Technical documentation

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Type Title Date
* Data sheet TPS56339 4.5-V to 24-V Input, 3-A Output Synchronous Buck Converter datasheet (Rev. A) May 15, 2019
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
White paper Achieve fast load-transient response & low EMI with AECM DC/DC control topology Feb. 15, 2021
User guide TPS56339EVM 3-A Regulator Evaluation Module (Rev. B) May 22, 2019
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

document-generic User guide
The TPS56339 evaluation module (EVM) is used to evaluate the TPS56339.The TPS56339 is an Advanced Emulated Current Mode (AECM) synchronous step-down DC/DC converter, being able to deliver 3-A continuous output current, providing an advance Eco-mode™ to maintain high light load efficiency (...)
  • Wide input range: 4.5 V to 24 V
  • Wide output voltage range: 0.8 V to 16 V or 95%*VIN
  • Advance emulated current mode control for fix switching frequency and fast transient response with ceramic output capacitors
  • Advanced Eco-mode™ for high light load efficiency

Design tools & simulation

SLVMD41.ZIP (106 KB) - PSpice Model
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 (...)
  • 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
  • (...)

CAD/CAE symbols

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

Ordering & quality

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