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.
Key Features
| Description | Version | Size |
|---|---|---|
| DS10625: Up to 4 V, 3 A step-down 2.3 MHz switching regulator for automotive applications | 2.0 | 1 MB |
| Description | Version | Size |
|---|---|---|
| AST1S3x family Power optimization for postregulated automotive systems | 1.0 | 896 KB |
| Description | Version | Size |
|---|---|---|
| Brochure Power management guide | 05.2016 | 4 MB |
| Part Number | Manufacturer | Description |
|---|---|---|
| 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 | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|
| AST1S31HF | VFDFPN 8 3x3x1.0 | Tape And Reel | 1.258 | 1000 | NEC | EAR99 | MALAYSIA |
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| AST1S31HF | VFDFPN 8 3x3x1.0 | Automotive | Ecopack1 | md_59-wspc-vfdfpn-wspc-8-wspc-3x3x1.0_yy59u1c7aa5.pdf md_59-wspc-vfdfpn-wspc-8-wspc-3x3x1.0_yy59u1c7aa5.xml |
