STMicroelectronics AST1S31HF
The AST1S31HF is an internally compensated 2.3 MHz fixed frequency PWM synchronous stepdown regulator. The AST1S31HF 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 AST1S31HF device integrates a 70 m highside switch and a 55 m synchronous rectifier allowing very high efficiency with very low output voltages.| Part No. | AST1S31HF |
|---|---|
| Datasheet | AST1S31HF Download |
| Manufacturer |  STMicroelectronics |
| Description | Up to 4V 3A step-down 2.3MHz switching regulator |
| Buy | Stock & Price |
APPLICATIONS
● Designed for automotive systems● Battery powered applications
● Car body applications
DESCRIPTION
FEATURES
● AECQ100 qualified● 3 A DC output current
● 2.8 V to 4 V input voltage
● Output voltage adjustable from 0.8 V
● 2.3 MHz switching frequency
● Internal soft-start and enable
● Integrated 70 m and 55 m power MOSFETs
● All ceramic capacitor
● Power Good (POR)
● Cycle-by-cycle current limiting
● Current foldback short-circuit protection
● VFDFPN 3 x 3 - 8L package The AST1S31HF device integrates a 70 m highside switch and a 55 m synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with internal compensation deliver a very compact solution with a minimum component count. The AST1S31HF is available in a 3 mm x 3 mm, 8-lead VFDFPN package. Figure 1. Application circuit 9,1 &LQBD &LQBVZ / 9,16: 6: 9,1$ (1 $67 6 +) 5 9)% 3* *1' 5 9287 &RXW August 2020 This is information on a product in full production. DocID026968 Rev 4 1/33 Contents Contents AST1S31HF 1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
