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DC-DC Switching Converters

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ST’s monolithic DC-DC switching regulators offer input-voltage capability up to 61 V, buck converters able to deliver output currents up to 6 A, and high switching frequency up to 2.3MHz.

DC-DC switching regulator

 The broad portfolio of ICs is composed of highly-specialized products to meet every market requirement and power management needs: high voltage technology, together with high reliability and robustness for industrial and automotive, compactness and high efficiency for consumer applications.

These switched-mode power supply devices embed a full set of protection functions (overcurrent, overvoltage, over-temperature) to increase the MTBF and reduce the number of external components needed for power conversion. There are multiple package options, all offering compactness and high thermal performances to fit different applications.

ST also has a unique and fully isolated, resonant, single-stage direct conversion from 48 V straight to the Point-of-Load (PoL), CPU/DDR in full compliance to Intel VR13 and VR12.5 specifications, and a fully scalable solution able to manage up to 6 interleaved cells with dynamic cell shedding and pulse skipping.

  

 

L6983 /2 /1 Integrated synchronous regulator
DC/DC converters
L7983 - Compact 60 V 300 mA
DC/DC converter
The A7987, a flexible automotive buck converter with a smart bootstrap

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.
STEVAL-2STPD01

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 supplies, battery-powered equipment, decentralized intelligent nodes and always-on devices like 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.

STEVAL-L6981CDR ; STEVAL-L6981NDR

STEVAL-L6982CDR ; STEVAL-L6982NDR

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

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:
DC/DC
AC/DC
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
Choose type:
DC/DC
AC/DC

Digital Power Workbench

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

Power Tree Designer

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