STMicroelectronics8-VDFN Exposed PadRoHS
AST1S31HF
IC REG BUCK ADJ 3A 8VFDFPN
Category
Subcategory
Pmic Voltage Regulators Dc Dc Switching Regulators
Package
8-VDFN Exposed Pad
Series
Automotive, AEC-Q100
Status
Active
$2.34 / unit (market reference)
MOQ: 3000 pcs
Submit your quantity via the inquiry form for a competitive quote within 24 hours.
Parameters
| Parameter | Value |
|---|---|
| Brand | STMicroelectronics |
| Model | AST1S31HF |
| Package / Case | 8-VDFN Exposed Pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Topology | Buck |
| Voltage - Input (Min) | 2.8V |
| Voltage - Input (Max) | 4V |
| Voltage - Output | 0.8V |
| Current - Output | 3A |
| Frequency - Switching | 2.3MHz |
| Number of Outputs | 1 |
| Supplier Device Package | 8-VFDFPN (3x3) |
| RoHS | RoHS |
| Part Status | Active |
Application & Notes
AST1S31HF by STMicroelectronics is a Buck IC commonly used in power supply designs, battery-powered devices, and DC-DC conversion modules. Input voltage up to 4V, output 0.8V. The 8-VDFN Exposed Pad package with surface mount mounting is standard for compact designs. Pay attention to input/output capacitor selection and PCB layout — switching regulators are sensitive to trace inductance.
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All Technical Specifications
| Function | Step-Down |
| Topology | Buck |
| Output Type | Adjustable |
| Current - Output | 3A |
| Number of Outputs | 1 |
| Output Configuration | Positive |
| Frequency - Switching | 2.3MHz |
| Synchronous Rectifier | Yes |
| Voltage - Input (Max) | 4V |
| Voltage - Input (Min) | 2.8V |
| Voltage - Output (Max) | 4V |
| Voltage - Output (Min/Fixed) | 0.8V |
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