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STは、完全絶縁型、共振型で48 VからPoL(Point-of-Load)やIntelのVR13/VR12.5仕様に完全準拠したCPU/DDR電源電圧へのシングルステージ直接変換、およびダイナミック・セル・シェッディングとパルス・スキップ機能により最大6つのインタリーブされた電池を管理できる完全な拡張性を備えた製品など、ユニークな製品ラインアップを提供しています。



Switching converters (DC-DC)
Quick reference guide
Fast and powerful electrical simulation software for SMPS and analog ICs
L7983 - Compact 60 V 300 mA
DC/DC converter

New Programmable Buck Converter for USB Power Delivery

The STPD01 is a programmable synchronous buck converter suitable for USB power delivery applications. The device provides those voltages required by USB power delivery systems as per USB PD 3.0 spec up to 60 W output power (20 V, 3 A) and includes the necessary circuitry for cable drop compensation.

Available in QFN24L 3 x 4 mm2, the STPD01 embeds a programmable watchdog to improve the robustness and the safety of the complete system, along with overvoltage, overcurrent and overtemperature protections.

Different values of output voltage and current limitation can be also set dynamically through I2C interface.

Evaluation board is available to support developers in their designs.

38 V 1.5 A / 2 A step-down converters with low quiescent current

The new L6981 and L6982 are  easy -to -use regulators delivering high efficiency capability atacross all loads. The wide input voltage range (3.5 V –- 38V) , makes them also the ideal solution for 24 V industrial bus-powered systems, HVAC power supplyies, battery-powered equipment, decentralized intelligent nodes and always-on devices includinglike smart sensors.

Housed in an SO8 package , the L6981 (1.5 A)  and L6982 (2 A) are also based on a peak current mode architecture with internal compensation, to help reduce the overall size and complexity of the end-product designs.

Evaluation boards are available, to support developers in their designs.



New synchronous buck controller to handle extreme step-down ratios

With compact dimensions and an input-voltage range from 6V to 75V, STMicroelectronics’ L3751 synchronous buck controller serves different applications, from industrial equipment to battery powered light electric vehicles.

Available in QFN20 package with wettable flanks, it is also suited to use in telecom and networking equipment that feature commonly used 24V and 48V buses.

The STEVAL-L3751V12, 100W evaluation board, is available to help designers accelerate device selection in power-supply development.

60 V 300 mA step-down converter with 10uA quiescent current

ST’s new L7983 is a compact synchronous buck converter able to satisfy noise-sensitive applications and maximize efficiency at light load thanks to its Low-noise and Low-consumption modes.

With a wide input-voltage range, the L7983 can operate from 12 and 24 V industrial buses with wide safety margins. It is also suitable for battery-powered applications, industrial fail-safe systems, decentralized intelligent nodes, appliances, robotics and precision-sensing applications that leverage the easy-to-use Low-noise mode.

Power supply and converter solution evaluation boards based on the L7983 are also available


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

Choose design tool:

Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
Choose type:

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
Choose type:

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
Choose type:

Power Tree Designer

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