ST1S40 3A DC step-down switching regulator

The ST1S40 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.

The ST1S40 integrates a 95 mΩ high side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.

The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.

The ST1S40 is available in VFQFPN 4 mm x 4 mm 8 lead package, HSOP-8 and standard SO-8

技术特性

3 A DC output current
4.0 V to 18 V input voltage
Output voltage adjustable from 0.8 V
850 kHz switching frequency
Internal soft-start
Integrated 95 mΩ and 69 mΩ Power MOSFETs
All ceramic capacitor
Enable
Cycle-by-cycle current limiting
Current fold back short-circuit protection
VFQFPN4x4-8L, HSOP-8, and SO-8 and packages

应用原理图

ST1S40 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
ST1S40IPHR	Active		1000	PowerSO-8	Tape And Reel		ST1S40IPHR
ST1S40IDR	Active		1000	SO-8	Tape And Reel		ST1S40IDR
ST1S40IPUR	Active		1000	VFDFPN 8 4x4x1.0	Tape And Reel		ST1S40IPUR

DATASHEET

描述	版本	大小
ST1S40 : DS6942: 3 A DC step-down switching regulator	4	1165KB