Overview
The AST1S31HF is a high-performance, internally compensated 2.3 MHz fixed frequency PWM synchronous step-down regulator produced by STMicroelectronics. This regulator is designed for automotive applications and complies with the AEC-Q100 standard. It operates from an input voltage range of 2.8 V to 4 V and can deliver an output current of up to 3 A. The device features an adjustable output voltage starting from 0.8 V, making it versatile for various power management needs in automotive systems.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.8 V to 4 V |
| Output Voltage Range | 0.8 V to 4 V (adjustable) |
| Output Current | Up to 3 A |
| Switching Frequency | 2.3 MHz |
| Package | 8-VDFN Exposed Pad |
| Grade | Automotive, AEC-Q100 |
| Soft-Start and Enable | Internal soft-start and enable |
Key Features
- Internally compensated 2.3 MHz fixed frequency PWM synchronous step-down regulator
- Adjustable output voltage from 0.8 V to 4 V
- High efficiency due to synchronous rectification
- Internal soft-start and enable functions
- Compliant with AEC-Q100 automotive standard
- Compact 8-VDFN Exposed Pad package
Applications
The AST1S31HF is designed for use in automotive systems, including but not limited to:
- Power management in infotainment systems
- Supply voltage regulation for automotive control units
- Powering sensors and actuators
- Battery management systems
Q & A
- What is the input voltage range of the AST1S31HF?
The input voltage range is from 2.8 V to 4 V. - What is the maximum output current of the AST1S31HF?
The maximum output current is up to 3 A. - What is the switching frequency of the AST1S31HF?
The switching frequency is 2.3 MHz. - Is the AST1S31HF suitable for automotive applications?
Yes, it is compliant with the AEC-Q100 automotive standard. - What is the package type of the AST1S31HF?
The package type is 8-VDFN Exposed Pad. - Does the AST1S31HF have internal soft-start and enable functions?
Yes, it has internal soft-start and enable functions. - What is the adjustable output voltage range of the AST1S31HF?
The adjustable output voltage range is from 0.8 V to 4 V. - Is the AST1S31HF efficient in terms of power conversion?
Yes, it features high efficiency due to synchronous rectification. - Where can I find detailed specifications of the AST1S31HF?
Detailed specifications can be found in the datasheet available on STMicroelectronics' official website and other authorized distributors like Digi-Key. - What are some common applications of the AST1S31HF in automotive systems?
Common applications include power management in infotainment systems, supply voltage regulation for automotive control units, powering sensors and actuators, and battery management systems.
