ST1S31 3 A DC step-down switching regulator

The ST1S31 is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The ST1S31 operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.

The ST1S31 integrates a 60 mΩ high-side switch and 45 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 ST1S31 is available in 3 mm x 3 mm, 8 lead VFDFPN and SO8 packages

技术特性

3 A DC output current
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 capacitor
Power Good (POR)
Cycle-by-cycle current limiting
Current foldback short-circuit protection
VFDFPN3x3-8L, SO8 packages

应用原理图

ST1S31 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
ST1S31PUR	Preview		1000	VFDFPN 8 3x3x1.0	Tape And Reel		ST1S31PUR
ST1S31D-R	Preview		1000	SO-8	Tape And Reel		ST1S31D-R

DATASHEET

描述	版本	大小
ST1S31 : DS8977: 3 A DC step-down switching regulator	1	1125KB