ST1S41 Series

4 A step-down switching regulator

Catalog

4 A step-down switching regulator

Part	Current - Output	Topology	Mounting Type	Voltage - Input (Min) [Min]	Supplier Device Package	Function	Voltage - Input (Max) [Max]	Frequency - Switching	Output Type	Voltage - Output (Max) [Max]	Output Configuration	Package / Case	Synchronous Rectifier	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Output (Min/Fixed)	Package / Case	Package / Case
STMicroelectronics ST1S41PUR	4 A	Buck	Surface Mount	4 V	8-DFN (4x4)	Step-Down	18 V	850 kHz	Adjustable	18 V	Positive	8-VDFN Exposed Pad		1	150 °C	-40 °C	0.8 V
STMicroelectronics ST1S41PHR	4 A	Buck	Surface Mount	4 V	8-HSOP	Step-Down	18 V	850 kHz	Adjustable	18 V	Positive	8-SOIC		1	150 °C	-40 °C	0.8 V	0.154 in	3.9 mm

Catalog

4 A step-down switching regulator

Description

The ST1S41 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S41 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 ST1S41 integrates 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 ST1S41 is available in VFQFPN 4 mm x 4 mm 8-lead package and HSOP-8.