AST1S31 Series

Up to 4 V, 3 A step-down 1.5 MHz switching regulator for automotive applications

Catalog

Up to 4 V, 3 A step-down 1.5 MHz switching regulator for automotive applications

Part	Synchronous Rectifier	Function	Output Configuration	Voltage - Output (Max) [Max]	Voltage - Input (Min) [Min]	Number of Outputs	Voltage - Output (Min/Fixed)	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Switching	Current - Output	Supplier Device Package	Output Type	Topology	Package / Case	Voltage - Input (Max)
STMicroelectronics AST1S31PUR		Step-Down	Positive	4 V	2.8 V	1	0.8 V	Surface Mount	150 °C	-40 °C	1.5 MHz	3 A	8-VFDFPN (3x3)	Adjustable	Buck	8-VDFN Exposed Pad	4 V
STMicroelectronics AST1S31PUR

Catalog

Up to 4 V, 3 A step-down 1.5 MHz switching regulator for automotive applications

Description

The AST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The AST1S31 device operates from 2.8 V to 4 V input, while it regulates an output voltage as low as 0.8 V and up to VIN. The AST1S31 integrates a 70 mΩ high-side switch and a 55 mΩ synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with an internal compensation deliver a very compact solution with a minimum component count. The AST1S31 device is available in a 3 x 3 mm, 8 leads VFDFPN package.