Silergy SY21249C1
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. It operates at a pseudoconstant frequency of 600kHz under heavy load conditions to minimize inductor and capacitor sizes. The SY21249C1 also provides a fixed 5V LDO with 100mA current capability, which can be used to power external peripherals.| Part No. | SY21249C1 |
|---|---|
| Datasheet | SY21249C1 Download |
| Manufacturer |  Silergy |
| Description | Synchronous Step-Down Regulator |
| Buy | Stock & Price |
GENERAL DESCRIPTION
To minimize conduction loss, it integrates a main switch and a synchronous switch with very low RDS(ON). Under light load conditions, the LDO can be switched over to the buck regulator output to reduce power loss. Silergy’s constant on-time (COT) ripple-based control strategy supports high input/output voltage ratios (low duty cycles), and fast transient response while maintaining a near-constant operating frequency over line, load, and output voltage ranges. This control method provides stable operation without complex compensation, even with low-ESR ceramic capacitors. The SY21249C1 offers protection against multiple conditions, including cycle-by-cycle current limit, input undervoltage lockout, output undervoltage and overvoltage protection, internal soft-start, and thermal shutdown. The SY21249C1 is available in a compact QFN3mm×4mm-13 package.FEATURES
● 5.5–24V Input Voltage Range● Up to 11A Output Current 100mA LDO Current
● Low RDS(ON) for Internal Switches...
