SY21019 Datasheet | Silergy

High-Efficiency, 2MHz, 40V Input, 300m A Asynchronous Buck Converter General Description The SY21019 high-efficiency asynchronous Buck converter can deliver 300m A output current over a wide input voltage range from 5V to 40V. The SY21019 employs a constant off-time and peakcurrent mode control strategy to achieve fast transient responses. It integrates a main switch with low RDS(ON) to minimize conduction loss. The 2MHz switching frequency permits low outputvoltage ripple and reduces external inductor and capacitor sizes. The SY21019 also provides cycleby-cycle current limiting, over temperature protection, and output short-circuit protection. The SY21019 is available in a pact SOT23-6 package. Features - Low RDS(ON) for Internal N-Channel Power FET: 2Ω - 5V to 40V Input Voltage Range - Up to 300m A Output Current - 2MHz Switching Frequency - Constant Off-Time and Peak-Current Mode Control - Internal Soft-Start Limits Inrush Current - ±2% 0.6V Reference - Output Short-Circuit Protection - Cycle-by-Cycle Peak Current Limit - Over Temperature Protection - Ro HS-pliant and Halogen-Free - pact SOT23-6 Package Applications - Smart Meter - Set-Top Box - Portable TV - Access Point Router - DSL Modem - LCD TV Typical Application VIN : 5~40V CIN ON/OFF VOUT CFF(opt.)...