The AST1S31HF is an internally compensated 2.3 MHz fixed frequency PWM synchronous step-down 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 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 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.
|DS10625: Up to 4 V, 3 A step-down 2.3 MHz switching regulator for automotive applications||2.0||1 MB|
|AST1S3x family Power optimization for postregulated automotive systems||1.0||896 KB|
|Brochure Power management guide||09.2017||3 MB|
|Electric vehicle (EV) ecosystem||1.1||1 MB|
|STEVAL-ISA160V1||ST||3 A / 2.3 MHz step-down synchronous switching regulator based on the AST1S31HF in a DFN 3x3 package|
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|AST1S31HF||VFDFPN 8 3x3x1.0||Tape And Reel||Active : Product is in volume production||1.258||1000||NEC||EAR99||MALAYSIA||MORE INFO||No availability reported, please contact our Sales office|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|AST1S31HF||Active||VFDFPN 8 3x3x1.0||Automotive||Ecopack1|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.