4.5-V to 18-V, 8-A synchronous SWIFT™ buck converter optimized for solution cost


Product details


Vin (Min) (V) 4.5 Vin (Max) (V) 18 Vout (Min) (V) 0.6 Vout (Max) (V) 7 Iout (Max) (A) 8 Iq (Typ) (uA) 110 Switching frequency (Min) (kHz) 600 Switching frequency (Max) (kHz) 1000 Features Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Power Good, Soft Start Adjustable Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN-HR (RJE) 20 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)


  • Input voltage range: 4.5 V to 18 V
  • D-CAP3™ architecture control for fast transient response
  • Output voltage range: 0.6 V to 7 V
  • 0.6-V±1% reference voltage (25°C)
  • Supports 8-A continuous output current
  • Integrated 19.5-mΩ and 9.5-mΩ RDS(on) internal power MOSFET
  • ULQ™(Ultra Low Quiescent current) feature to enable long battery life
  • Selectable operation modes:
    • Forced continuous conduction mode (FCCM)
    • Out-of-Audio™(OOA) Mode
    • Advanced Eco-Mode™
  • Selectable 600-kHz, 800-kHz and 1-MHz switching frequency
  • Supports up to 90% duty operation
  • Adjustable soft start time by SS pin
  • Power good output
  • Built-in output discharge function
  • Cycle-by-cycle over current protection
  • Non-latched for fault protection
  • Small 3.0-mm × 3.0-mm HotRod™ QFN package

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The TPS568230 is a cost effective, high-voltage input, high efficiency synchronous buck converter with integrated MOSFETs.

The TPS568230 has the ULQ™ (Ultra Low Quiescent current) feature to enable low-bias current. It operates with supply input voltage from 4.5 V to 18 V. It uses DCAP3™ control mode to provide fast transient response, good line, load regulation, no requirement for external compensation, and support low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors.

The TPS568230 provides complete Over-voltage, Under-voltage, Over-current, Over-temperature and Under-voltage lock-out protections. It is combined power good signal , output discharge function and large duty operation feature.

TPS568230 is equipped with a MODE pin to select the desirable mode of operation. To attain high efficiency at light load, OOA mode and Advanced Eco-mode™ could be selected. OOA mode will not allow the part to go below audible frequency ( below 25kHz switching frequency ). FCCM is also available to support tight output voltage ripple requirement.

The TPS568230 supports both internal and external soft-start time option. The internal fixed soft-start time is 1.3 ms. Longer soft-start time can be get by connecting the external capacitor on SS pin.

The TPS568230 is available in a 20-pin 3.0-mm x 3.0-mm HotRod™ package and the junction temperature is specified from -40oC to 125oC.

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Technical documentation

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Type Title Date
* Datasheet TPS568230 4.5-V to 18-V Input, 8-A Synchronous Step-Down Voltage Regulator datasheet (Rev. C) Aug. 08, 2019
More literature TPS568230EVM EU RoHS Declaration of Conformity (DoC) Sep. 17, 2020
Selection guide Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Application note Large Duty Cycle Operation With the TPS568230 Mar. 31, 2020
Application note How the Switching Frequency Affects the Performance of a Buck Convertor Jun. 24, 2019
Technical articles How to choose a DC/DC converter for a storage application May 08, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Understanding OOA Operation Mode Feb. 15, 2019
User guide Using the TPS568230EVM-BSR070 Dec. 05, 2018

Design & development

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Hardware development

document-generic User guide
The TPS568230 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS568230 step-down converters. The TPS568230EVM operates from 4.5-V to 18-V input (12-V nominal) and provides a 1.05-V, 8-A output. Several jumpers and switches allow user to evaluate different control (...)
  • ULQ (ultra low quiescent)
  • Integrated 20-mΩ/10-mΩ RDSON FET Converter
  • FCCM/eco-mode/OOA mode selectable for light load
  • Can support 8-A output current

Design tools & simulation

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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
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  • Supports simultaneous analysis of multiple products
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