SY21249C1 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). It operates at a pseudoconstant frequency of 600kHz under heavy load conditions to minimize inductor and capacitor sizes.
SY21249C1 Key Features
- 5.5-24V Input Voltage Range
- Up to 11A Output Current
- Low RDS(ON) for Internal Switches: 17mΩ
- Integrated 1.5Ω Bypass Switch
- COT Ripple-Based Control to Achieve Fast
- Soft-Start Inrush Current Limit
- Pseudoconstant Frequency: 600kHz
- Fixed 5.15V Output Voltage
- ±1.5% Internal Reference Voltage
- PFM/Ultrasonic (USM) Selectable Light