Product details

Vin (Min) (V) 3.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 25 Iout (Max) (A) 2 Iq (Typ) (uA) 75 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Light Load Efficiency, UVLO Adjustable, Soft Start Adjustable Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 90
Vin (Min) (V) 3.5 Vin (Max) (V) 28 Vout (Min) (V) 0.8 Vout (Max) (V) 25 Iout (Max) (A) 2 Iq (Typ) (uA) 75 Switching frequency (Min) (kHz) 300 Switching frequency (Max) (kHz) 300 Features Enable, Light Load Efficiency, UVLO Adjustable, Soft Start Adjustable Rating Catalog Regulated outputs (#) 1 Control mode Current Mode Duty cycle (Max) (%) 90
SOIC (D) 8 19 mm² 3.91 x 4.9
  • 3.5 V to 28 V Input Voltage Range
  • Adjustable Output Voltage Down to 0.8 V
  • Integrated 80 mΩ High Side MOSFET Supports
    up to 2A Continuous Output Current
  • High Efficiency at Light Loads with a Pulse
    Skipping Eco-mode™
  • Fixed 300 kHz Switching Frequency
  • Typical 1 µA Shutdown Quiescent Current
  • Adjustable Slow Start Limits Inrush Currents
  • Programmable UVLO Threshold
  • Overvoltage Transient Protection
  • Cycle by Cycle Current Limit, Frequency Fold
    Back and Thermal Shutdown Protection
  • Available in Easy-to-Use SOIC8 Package
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)
  • APPLICATIONS
    • Consumer Applications such as Set-Top Boxes,
      CPE Equipment, LCD Displays, Peripherals, and
      Battery Chargers
    • Industrial and Car Audio Power Supplies
    • 5V, 12V and 24V Distributed Power Systems

WEBENCH Is a trademark of Texas Instruments
All other trademarks are the property of their respective owners

  • 3.5 V to 28 V Input Voltage Range
  • Adjustable Output Voltage Down to 0.8 V
  • Integrated 80 mΩ High Side MOSFET Supports
    up to 2A Continuous Output Current
  • High Efficiency at Light Loads with a Pulse
    Skipping Eco-mode™
  • Fixed 300 kHz Switching Frequency
  • Typical 1 µA Shutdown Quiescent Current
  • Adjustable Slow Start Limits Inrush Currents
  • Programmable UVLO Threshold
  • Overvoltage Transient Protection
  • Cycle by Cycle Current Limit, Frequency Fold
    Back and Thermal Shutdown Protection
  • Available in Easy-to-Use SOIC8 Package
  • Supported by WEBENCH® Software Tool
    (www.TI.com/WEBENCH)
  • APPLICATIONS
    • Consumer Applications such as Set-Top Boxes,
      CPE Equipment, LCD Displays, Peripherals, and
      Battery Chargers
    • Industrial and Car Audio Power Supplies
    • 5V, 12V and 24V Distributed Power Systems

WEBENCH Is a trademark of Texas Instruments
All other trademarks are the property of their respective owners

The TPS54233 is a 28 V, 2 A non-synchronous buck converter that integrates a low RDS(on) high side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode™ feature is automatically activated. Furthermore, the 1 µA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the Hysteresis of the input under-voltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle by cycle current limit scheme, frequency fold back and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54233 is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.

The TPS54233 is a 28 V, 2 A non-synchronous buck converter that integrates a low RDS(on) high side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode™ feature is automatically activated. Furthermore, the 1 µA shutdown supply current allows the device to be used in battery powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the Hysteresis of the input under-voltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle by cycle current limit scheme, frequency fold back and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54233 is available in an 8-pin SOIC package that has been internally optimized to improve thermal performance.

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Technical documentation

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Type Title Date
* Data sheet TPS54233 2A, 28V Input, Step Down DC/DC Converter With Eco-mode™ datasheet (Rev. C) PDF | HTML 30 Jan 2015
User guide TPS54233 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 26 Oct 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Understanding Eco-mode(TM) Operation 05 Dec 2016
Application note Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) 26 Oct 2012
Application note Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) 15 Sep 2010

Design & development

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

Evaluation board

TPS54233EVM-373 — Evaluation Module for TPS54233 Step-Down Converter with Eco-mode

The TPS54233 dc/dc converter is designed to provide up to a 2 A output from an input voltage source of 3.5 V to 28 V. Rated input voltage and output current range for the evaluation module are given in Table 1 of the User Guide. This evaluation module is designed to demonstrate the small (...)
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS54233 Unencrypted PSpice Transient Model Package (Rev. B)

SLUM209B.ZIP (228 KB) - PSpice Model
Calculation tool

SWIFTINV-CALC — Inverting Power Supply Calculator for SWIFT DC/DC with Integrated FETs

The SWIFTINV-CALC Excel sheet is a complementary worksheet to the SLVA317 application note. The worksheet is used to calculate the external components needed to create a negative output voltage from a positive input voltage. The tool features several families of wide input voltage, current-mode (...)
Calculation tool

SWIFTPOSNEG-CALC — Positive and Negative Output Voltage Split Rail Calculator for SWIFT DC/DC Converters

The SWIFTPosNeg-CALC Excel sheet is a complementary worksheet to the SLVA369 application note.

This worksheet is used to calculate the external components needed to create a dual output (i.e. positive and negative) power supply using a step-down switching regulator and catalog off the shelf coupled (...)

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 (...)
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