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Buck and Buck-Boost Converter

Overview
Documentation
Tools and Software
HW Evaluation Tools
Solutions
Key Products
Off-line converters based on buck, or step-down, and buck-boost, or step-down/up, topologies convert the mains to a regulated DC output, either positive or negative, without the need for an isolation transformer by modulating the duty cycle of the power switch.  The waveform of the current in the inductor defines the converter’s mode of operation that can be continuous when the current in the inductor never drops to zero, or discontinuous when the said current stays at zero for a given time interval – and boundary or transition mode when the inductor current is zero at a single point. Both topologies can use a low-cost inductor for energy storage and the transfer from input to output. Read more

Our products and solutions

Our VIPerPlus high-voltage converters help design high-efficiency, cost-effective off-line buck and buck-boost converters with a minimum component count and enhanced reliability thanks to a set of features including pulse skip protection that can help reduce peak current at start-up allowing the use of smaller, less expensive inductors. 

In addition, we provide an extensive set evaluation and development boards as well as reference designs.

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      ST Diode Finder

      Active

      Diode product finder application for Android and iOS

      Finder Apps ST
      ST Diode Finder

      Description:

      Diode product finder application for Android and iOS

      ST Voltage Regulator Finder

      Active

      Linear and switching voltage regulators and voltage reference applications for smartphones and tablets

      Finder Apps ST
      ST Voltage Regulator Finder

      Description:

      Linear and switching voltage regulators and voltage reference applications for smartphones and tablets

All Hardware Evaluation Tools

    • Part Number
      Description
      Core product
      Tool Type
      Supplier
      Sort by: part number

      STEVAL-ISA010V1

      Active

      Ultra wide range dual output back converter demonstration board based on the VIPER16

      - AC-DC Converter -
      STEVAL-ISA010V1
      Active

      Ultra wide range dual output back converter demonstration board based on the VIPER16

      STEVAL-ISA096V1

      Active

      Auxiliary power supply in buck-boost topology based on the Viper06

      VIPER06 AC-DC Converter -
      STEVAL-ISA096V1
      Active

      Auxiliary power supply in buck-boost topology based on the Viper06

      STEVAL-ISA114V1

      Active

      5 V/0.8 W wide-range 30 kHz buck converter based on the VIPer06XS

      - AC-DC Converter ST
      STEVAL-ISA114V1
      Active

      5 V/0.8 W wide-range 30 kHz buck converter based on the VIPer06XS

      STEVAL-ISA115V1

      Active

      12 V, 150 mA non-isolated buck converter using VIPer™ Plus - VIPER06XS

      - AC-DC Converter ST
      STEVAL-ISA115V1
      Active

      12 V, 150 mA non-isolated buck converter using VIPer™ Plus - VIPER06XS

      STEVAL-ISA116V1

      Active

      5 W, 2-output wide-range buck converter based on the VIPER26LD

      - AC-DC Converter ST
      STEVAL-ISA116V1
      Active

      5 W, 2-output wide-range buck converter based on the VIPER26LD

      STEVAL-ISA119V1

      Active

      1.5 W double output buck demonstration board based on the VIPER16LD

      - AC-DC Converter -
      STEVAL-ISA119V1
      Active

      1.5 W double output buck demonstration board based on the VIPER16LD

      STEVAL-ISA130V1

      Active

      12 V 140 mA 30 kHz non-isolated buck topology regulator based on VIPer06XN

      - AC-DC Converter -
      STEVAL-ISA130V1
      Active

      12 V 140 mA 30 kHz non-isolated buck topology regulator based on VIPer06XN

      STEVAL-ISA178V1

      Active

      5 V / 200 mA high voltage buck-converter based on VIPer01

      - AC-DC Converter ST
      STEVAL-ISA178V1
      Active

      5 V / 200 mA high voltage buck-converter based on VIPer01

      STEVAL-ISA179V1

      Active

      15 V, 0.15 A buck converter using VIPer™ Plus - VIPer0P

      - AC-DC Converter ST
      STEVAL-ISA179V1
      Active

      15 V, 0.15 A buck converter using VIPer™ Plus - VIPer0P

      STEVAL-ISA195V1

      Active

      5 V / 0.36 A buck converter using VIPerPlus ? VIPer11

      VIPER11 AC-DC Converter ST
      STEVAL-ISA195V1
      Active

      5 V / 0.36 A buck converter using VIPerPlus ? VIPer11

      STEVAL-PMIC1K1

      Active

      Evaluation board for high integration STPMIC1x power management IC for microprocessor units

      STPMIC1 PSU and Converter Solution Eval Boards ST
      STEVAL-PMIC1K1
      Active

      Evaluation board for high integration STPMIC1x power management IC for microprocessor units

      STEVAL-VP12201B

      Active

      15 V/200 mA buck converter based on VIPER122

      VIPER122 AC-DC Converter ST
      STEVAL-VP12201B
      Active

      15 V/200 mA buck converter based on VIPER122

      STEVAL-VP22201B

      Active

      5 V - 360 mA buck converter based on VIPer222XSTR

      - PSU and Converter Solution Eval Boards ST
      STEVAL-VP22201B
      Active

      5 V - 360 mA buck converter based on VIPer222XSTR

      STEVAL-VP26K01B

      Active

      15 V / 100 mA high voltage buck converter reference design based on VIPER26K

      VIPER26K AC-DC Converter ST
      STEVAL-VP26K01B
      Active

      15 V / 100 mA high voltage buck converter reference design based on VIPER26K

      STEVAL-VP319X1B

      Active

      5 V / 0.6 A Buck converter based on VIPER319X

      - AC-DC Converter ST
      STEVAL-VP319X1B
      Active

      5 V / 0.6 A Buck converter based on VIPER319X