Buck-Boost Regulators

Supporting up to 3 A of operating current, ST’s single-inductor synchronous buck-boost converters integrate four low on-state resistance power MOSFETs which contribute to PCB saving and reduced power losses, making them ideal for Li-ion battery-powered applications.

The main features of our buck-boost regulators include:

  • Wide input voltage range (from 1.8 to 5.5 V) covering all the main battery solutions
  • High switching frequency (up to 3 MHz) resulting in more compact designs (reduced size of passive components)
  • Full set of monitoring: sync, Pgood and low battery detection
  • Power-save mode at light load for higher efficiency
  • Typical efficiency: > 94%
  • Up to 3 A output current capability
  • Shutdown current < 1 μA for extended battery life

They are mainly used where the input voltage can change from VIN - VOUT > VIN  to  VIN - VOUT < VIN

Switching converters (DC-DC)
Quick reference guide


eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

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Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
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Solar Battery Charger

LED Lighting Design Tool

Handles AC-DC and DC-DC design in common topologies
Displays interactive and annotated schematic
Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
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Digital Power Workbench

Provides a step-by-step optimized design of power section and control loop
Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs
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ZVS Totem Pole PFC
Vienna Rectifier
3-Level T-type Converter

Power Tree Designer

Specify input/output power for each node in the tree
Check for consistency
Design each individual node