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.
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.
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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 / 3 A step-down converters with low quiescent current
The L6981, L6982, and L6983 are easy-to-use regulators delivering high-efficiency capability across all loads. The wide input voltage range (3.5 V – 38 V), 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 a standard SO-8 package, the L6981 (1.5 A) and L6982 (2 A) are based on a peak current mode architecture with internal compensation, to help reducing the overall size and complexity of the end-product designs. Packaged in QFPN 16L, the L6983 (3 A) allows the switching frequency to be selected in the 200 kHz - 2.3 MHz range with optional spread spectrum for improved EMC
Evaluation boards are available, to support developers in their designs.
STEVAL-L6981CDR; STEVAL-L6981NDR
60 V 300 mA step-down converter with 10 uA quiescent current
The ST’s 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
Synchronous buck controller to handle extreme step-down ratios
With compact dimensions and an input-voltage range from 6 V to 75 V, the 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 24 V and 48 V buses.
The STEVAL-L3751V12, 100 W evaluation board, is available to help designers accelerate device selection in power-supply development.
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
Thermal-electrical Simulators for Components
Signal Conditioning Design Tool
NFC/RFID Calculators
Power Supply Design Tool
LED Lighting Design Tool
Digital Power Workbench
Power Tree Designer
AC Switches Simulator
Rectifier Diodes Simulator
STPOWER Studio
Twister Sim
TVS Simulator
Estimate
PCB Thermal Simulator
Active Filters
Comparators
Low side Current Sensing
High side Current Sensing
NFC Inductance
UHF Link Budget
