AST1S31HF
ActiveUP TO 4 V, 3 A STEP-DOWN 2.3 MHZ SWITCHING REGULATOR FOR AUTOMOTIVE APPLICATIONS
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AST1S31HF
ActiveUP TO 4 V, 3 A STEP-DOWN 2.3 MHZ SWITCHING REGULATOR FOR AUTOMOTIVE APPLICATIONS
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Technical Specifications
Parameters and characteristics for this part
| Specification | AST1S31HF |
|---|---|
| Current - Output | 3 A |
| Frequency - Switching | 2.3 MHz |
| Function | Step-Down |
| Grade | Automotive |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 8-VDFN Exposed Pad |
| Qualification | AEC-Q100 |
| Supplier Device Package | 8-VFDFPN (3x3) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 4 V |
| Voltage - Input (Min) [Min] | 2.8 V |
| Voltage - Output (Max) [Max] | 4 V |
| Voltage - Output (Min/Fixed) | 0.8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | N/A | 0 | $ 1.90 | |
Description
General part information
AST1S31HF Series
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.