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A buck or step-down topology is used in DC-DC switching converters where the output voltage is lower than the input with or without input-output isolation.

We have a large offer of buck regulators - with integrated power switches – and controllers providing a wide range of features including soft start to minimize inrush current and power-good to enable power-up sequencing. Programmable devices are also available to help design buck converters fine-tuned for specific EMI, EMC, efficiency and power density targets and use cases.

We have also developed an isolated, single-stage direct 48 V to the Point-of-Load (PoL) resonant, conversion solution for use in CPUs or DDR memories compliant with Intel VR13 and VR12.5 specifications. ST also offers a fully scalable solution for up to 6 interleaved cells with dynamic cell shedding and pulse skipping features.

In addition, we have a comprehensive set of evaluation and development tools as well as reference designs to help compress time to market.

Power Schottky

STripFET F7 series

STripFET F7 series

A6727

STripFET F7 series

STripFET F7 series

Power Schottky

Power Schottky

A6727

Buck Regulators

Multi-phase Controllers

STripFET F7

STripFET F7

STripFET F7

STripFET F7

产品型号	描述
STEVAL-ISA043V2	1.5 A / 3.3 V high frequency synchronous buck converter demonstration board based on the ST1S06	Quick view 主要特性 Adjustable current-mode pulse width modulation (PWM) synchronous, step-down DC-DC converter with inhibit function Input voltage, Vin: 2.5 V to 5.5 V Output voltage, Vout: 3.3 V Output current, Iout: 1.5 A Switching frequency: 1.5 MHz RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA095V1	Up to 3 A step-down switching regulator based on the ST1S14	Quick view 主要特性 3 A DC output current Operating input voltage from 5.5 V to 48 V 850 kHz internally fixed switching frequency Internal soft-start Internal current limiting Inhibit for zero current consumption 2 mA maximum quiescent current over-temperature range Thermal shutdown RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA082V1	4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPHR	Quick view 主要特性 Input voltage Vin = 4 V to 18 V Output voltage Vout = 3.3 V Maximum output current: 3 A Switching frequency: 800 kHz Short-circuit protected RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA069V1	3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in DFN 3x3 package	Quick view 主要特性 4 A peak output current From 2.8 V to 5.5 V input voltage Output voltage adjustable from 0.8 V 1.5 MHz switching frequency Internal soft-start and enable Integrated 60 mΩ and 45 mΩ power MOSFETs All ceramic capacitors Power Good (POR) Cycle-by-cycle current limiting Current foldback short-circuit protection RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA099V1	3 A step-down switching demonstration board based on the L7986 in DFN10 package	Quick view 主要特性 3 A DC output current From 4.5 V to 38 V range input voltage Output voltage adjustable from 0.6 V 250 kHz switching frequency programmable up to 1 MHz Internal soft-start and enable Low dropout operation: 100% duty cycle Voltage feed-forward Zero load current operation Overcurrent and thermal protection RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA152V1	3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987	Quick view 主要特性 3.3 V output voltage 3 A DC output current 4.5 V to 60 V input voltage 500 kHz switching frequency 3.5 ms programmed soft-start VBIAS switch-over for improved efficiency at light load 180° out of phase synchronization available Open drain PGOOD available Auto recovery overcurrent and thermal protection RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA158V1	38 V - 2 A synchronous step-down switching regulator evaluation board based on the A6986	Quick view 主要特性 4 V to 38 V operating input voltage Low consumption mode or low noise mode 30 µA I_Q at light load (LCM V_OUT = 3.3 V) 5 µA I_Q-SHTDWN Adjustable f_SW (250 kHz - 2 MHz) Output voltage adjustable from 0.85 V to V_IN Embedded output voltage supervisor Synchronization Adjustable soft-start time Internal current limiting Overvoltage protection Output voltage sequencing Peak current mode architecture R_DS(on)HS = 180 mΩ; R_DS(on)LS = 150 mΩ Thermal shutdown RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-1PS01DJR	Evaluation board based on ST1PS01DJR 400 mA nano-quiescent synchronous step-down converter	Quick view 主要特性 1.8 V to 5.5 V input operating range Up to 400 mA output current capability Tiny external components: L=2.2 µH typ Selectable output voltages: 1.8 V to 2.8 V Output voltage Power Good Dynamic output voltage selection (D0, D1) Suitable for the following applications: Wearable applications Personal tracking monitors Smart watches, sport bands Energy harvesting, wireless sensors Wearable and fitness accessories Industrial sensors, portable low power devices Single cell Li-Ion battery applications Bluetooth® low energy ZigBee® WEEE and RoHS compliant (hardware only) Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-1PS01EJR	Evaluation board based on the ST1PS01EJR 400 mA nano-quiescent synchronous step-down converter	Quick view 主要特性 94% typical efficiency at 1 mA load (V_IN =3.6 V, V_OUT =3.3 V) 1.8 V to 5.5 V input operating range Up to 400 mA output current capability Tiny external components: L=2.2 µH typ. Selectable output voltages: 1.8 V to 3.3 V Output voltage Power Good Dynamic output voltage selection (D0, D1) Suitable for the following applications: Wearable applications Personal tracking monitors Smart watches, sport bands Energy harvesting, wireless sensors Wearable and fitness accessories Industrial sensors, portable low power devices Single cell Li-Ion battery applications Bluetooth^® low energy ZigBee^® Hardware is WEEE and RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-1PS01AJR	Evaluation board based on ST1PS01AJR 400 mA nano-quiescent synchronous step-down converter	Quick view 主要特性 1.8 V to 5.5 V input operating range Up to 400 mA output current capability Tiny external components: L=2.2 µH typ. Selectable output voltages: 1.9 V to 2.8 V Output voltage Power Good Dynamic output voltage selection (D0, D1) Suitable for the following applications: Wearable applications Personal tracking monitors Smart watches, sport bands Energy harvesting, wireless sensors Wearable and fitness accessories Industrial sensors, portable low power devices Single cell Li-Ion battery applications Bluetooth® low energy Zigbee WEEE and RoHS compliant (hardware only) Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
AEK-POW-L5964V1	Digitally controlled DC-DC converter with L5964 for automotive applications	Quick view 主要特性 Dual channel, independent, step-down regulators with integrated synchronous MOSFETs Output current up to 3 A each channel Channels can be paralleled to obtain a higher current supply Input voltage range from 6 to 14 V Digitally selectable fixed output voltages: 3.3 - 5 - 9 V PWM programmable output voltages with 20 mV steps over a range of 3.3 - 11 V Outputs protected against short-circuit and overcurrent Input and output voltage monitors (UV or OV) and power good signals Thermal protection thanks to the integrated thermal sensor Additional 3.3 V output by internal linear regulator Watchdog, reset, in/out synchronisation for available converters Board size: 84.7 mm x 81.3 mm Maximum component height: 10 mm Automotive grade qualified ST components Included in the AutoDevKit™ initiative CE certified RoHS and China RoHS compliant WEEE compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA205V1	38 V, 2 A synchronous step-down switching regulator evaluation board based on the A6986H	Quick view 主要特性 AECQ100 qualification 2 A DC output current 4 V to 38 V operating input voltage Low consumption mode or low noise mode Programmable I_SKIP current 30 μA IQ at light load (LCM V_IN = 12 V and V_OUT = 3.3 V) 8 μA I_Q-SHTDWN Adjustable f_SW (250 kHz - 2 MHz) Output voltage adjustable from 0.85 V to V_IN Embedded output voltage supervisor Synchronization (in all f_SW range) Adjustable soft-start time Internal current limiting Overvoltage protection Peak current mode architecture R_DS(on)HS = 180 mΩ; R_DS(on)LS = 150 mΩ Thermal shutdown RoHS and WEEE compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA207V1	3 A step down DC/DC switching regulator (VIN = 4.5 V to 60 V) based on the A7987	Quick view 主要特性 4.5 V to 60 V input voltage Step-down (buck) conversion 3.3 V output voltage Up to 3 A DC output current 500 kHz switching frequency 3.5 ms programmed soft-start Compliant with ceramic output capacitors 180° out-of-phase synchronization available Auto recovery overcurrent and thermal protection RoHS and China RoHS compliant WEEE compliant (2012/19/UE RAEE II) Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA208V1	38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR	Quick view 主要特性 3.5 V to 38 V operating input voltage Output voltage from 0.85 V to VIN 3.3 V and 5 V fixed output voltage versions 3 A DC output current 17 μA operating quiescent current Internal compensation network Two different versions: LCM for high efficiency at light loads LNM for noise sensitive applications 2 μA shutdown current Internal soft-start Enable Overvoltage protection Thermal protection Output voltage sequencing QFN16 package 200 kHz to 2.2 MHz programmable switching frequency; stable with low ESR capacitor Optional spread spectrum for improved EMC Power good Synchronization to external clock for LNM devices Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA094V1	3 A step-down switching power supply demonstration board based on the L7981 (HSOP8)	Quick view 主要特性 3 A DC output current 4.5 V to 28 V input voltage Output voltage adjustable from 0.6 V 250 kHz switching frequency, programmable up to 1 MHz Internal soft-start and enable Low dropout operation: 100% duty cycle Voltage feed-forward Zero load current operation Overcurrent and thermal protection RoHS compliant Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber
STEVAL-ISA055V1	0.7 A / 1.2 V synchronous buck converter with enable function based on the ST1S12XX	Quick view 主要特性 R_DS(on) typ. 250 m and 400 m Not switching quiescent current: max 600 μA over temperature range Uses tiny capacitors and inductors Internal soft-start Enable function Step-down current mode PWM (1.7 MHz) DCDC converter 0.7 A output current capability Fixed output voltage of 1.2 V Synchronous rectification Typical efficiency: > 90% 3% DC output voltage tolerance Show More Product Details 下载产品简介图片特色资源 Schematics BOM Gerber

产品型号

STEVAL-ISA043V2

1.5 A / 3.3 V high frequency synchronous buck converter demonstration board based on the ST1S06

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STEVAL-ISA095V1

Up to 3 A step-down switching regulator based on the ST1S14

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STEVAL-ISA082V1

4 A peak 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40IPHR

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STEVAL-ISA069V1

3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in DFN 3x3 package

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STEVAL-ISA099V1

3 A step-down switching demonstration board based on the L7986 in DFN10 package

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STEVAL-ISA152V1

3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987

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STEVAL-ISA158V1

38 V - 2 A synchronous step-down switching regulator evaluation board based on the A6986

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STEVAL-1PS01DJR

Evaluation board based on ST1PS01DJR 400 mA nano-quiescent synchronous step-down converter

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STEVAL-1PS01EJR

Evaluation board based on the ST1PS01EJR 400 mA nano-quiescent synchronous step-down converter

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STEVAL-1PS01AJR

Evaluation board based on ST1PS01AJR 400 mA nano-quiescent synchronous step-down converter

快速查看

AEK-POW-L5964V1

Digitally controlled DC-DC converter with L5964 for automotive applications

快速查看

STEVAL-ISA205V1

38 V, 2 A synchronous step-down switching regulator evaluation board based on the A6986H

快速查看

STEVAL-ISA207V1

3 A step down DC/DC switching regulator (VIN = 4.5 V to 60 V) based on the A7987

快速查看

STEVAL-ISA208V1

38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR

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STEVAL-ISA094V1

3 A step-down switching power supply demonstration board based on the L7981 (HSOP8)

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STEVAL-ISA055V1

0.7 A / 1.2 V synchronous buck converter with enable function based on the ST1S12XX

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00 选择要下载的文档

技术文档

应用手册

描述	版本	文档大小	操作
AN1768 ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES	1.1	46.82 KB	PDF
AN2025 CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION	1.1	147.59 KB	PDF
AN604 Calculation of conduction losses in a power rectifier	3.2	137.74 KB	PDF
AN4021 Calculation of reverse losses in a power diode	1.0	120.47 KB	PDF
AN5028 Calculation of turn-off power losses generated by a ultrafast diode	1.0	1.68 MB	PDF
AN4381 Current sharing in parallel diodes	1.0	449.12 KB	PDF
AN3267 Impact of power MOSFET VGS on buck converter performance	1.2	1.13 MB	PDF
AN1453 NEW FAMILY OF 150V POWER SCHOTTKY	1.1	131.48 KB	PDF
AN4391 New P-channel trench technology from ST for low power DC-DC conversions and load switching applications	1.0	1.6 MB	PDF
AN4150 Power MOSFET technology gate current needs in a synchronous buck converter	1.2	1.35 MB	PDF
AN4191 Power MOSFET: Rg impact on applications	1.2	1.45 MB	PDF
AN4192 Power MOSFETs: best choice guide for VRM application	1.0	4.8 MB	PDF
AN5046 Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages	4.0	4.82 MB	PDF
AN5088 Rectifiers thermal management, handling and mounting recommendations	2.0	2.32 MB	PDF
AN533 SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting	3.6	217.19 KB	PDF
AN443 SERIES OPERATION ON FAST RECTIFIERS	2.1	202.48 KB	PDF
AN1542 THE THERMAL RUNAWAY LAW IN SCHOTTKY USED IN OR-ING APPLICATION	1.1	57.47 KB	PDF
AN869 Tj max limit of Schottky diodes	2.2	60.9 KB	PDF

AN1768

ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES

产品型号	描述
A7985A	2 A step-down switching regulator for automotive applications
A7986A	3 A step-down switching regulator for automotive applications
L6985F	38 V 500 mA synchronous step-down switching regulator with 30 uA quiescent current
L6986	38 V 2 A synchronous step-down switching regulator with 30 uA quiescent current
L6986F	38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent current
L7987	61 V 3 A asynchronous step-down switching regulator with adjustable current limitation
L7987L	61 V 2 A asynchronous step-down switching regulator with adjustable current limitation
ST1S06	Synchronous rectification with inhibit, 1.5 A, 1.5 MHz adjustable, step-down switching regulator
ST1S12XX	Synchronous rectification with inhibit, 0.7 A, 1.7 MHz adjustable, step-down switching regulator
ST1S14	Up to 3 A step down switching regulator
ST1S31	3 A DC step-down switching regulator
ST1S40	3A DC step-down switching regulator
ST1S41	4 A step-down switching regulator

	描述	版本	文档大小	操作
	DN0010 Adapting ST power line modem evaluation boards to communicate over a DC bus	1.2	404.54 KB	PDF
	DN0011 ST1S03 alternative topology: Using a buck in a negative buck-boost configuration	1.2	361.3 KB	PDF

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