Buck-Boost Regulators

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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



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

Power Tree Designer

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