SY21249C1 Overview
Description
The SY21249C1 high-efficiency synchronous stepdown DC/DC regulator is capable of delivering 11A current over a wide input voltage range of 5.5V to 24V. To minimize conduction loss, it integrates a main switch and a synchronous switch with very low RDS(ON).
Key Features
- 5.5–24V Input Voltage Range
- Up to 11A Output Current 100mA LDO Current
- Low RDS(ON) for Internal Switches: 17mΩ Top, 7.5mΩ Bottom
- Integrated 1.5Ω Bypass Switch
- COT Ripple-Based Control to Achieve Fast Transient Responses
- Soft-Start Inrush Current Limit
- Pseudoconstant Frequency: 600kHz
- Fixed 5.15V Output Voltage
- ±1.5% Internal Reference Voltage
- PFM/Ultrasonic (USM) Selectable Light- Load Operation Mode
