SY21142 Datasheet | Silergy

High-Efficiency, 2A, 60V Input Asynchronous Buck Converter General Description The SY21142 high-efficiency asynchronous Buck converter can deliver 2A output current over a wide input voltage range from 4.5V to 60V. The SY21142 employs a constant off-time and peak current mode control strategy to achieve fast transient responses. It integrates a main switch with low RDS(ON) to minimize conduction loss. The adjustable switching frequency permits low output voltage ripple and reduces external inductor and capacitor sizes. The SY21142 also provides cycle-by-cycle peak current limiting, over temperature protection, and output short circuit protection. The SY21142 is available in a pact SO8E package. Features - Low RDS(ON) for Internal N-channel Power FET: 175mΩ - 4.5V to 60V Input Voltage Range - Up to 2A Output Current - Adjustable Switching Frequency Range: 100k Hz to 1MHz - Constant Off-Time and Peak Current Mode Control - Internal Soft-Start Limits Inrush Current - ±1% 0.8V Reference - EN ON/OFF Control with Accurate Threshold - Hiccup Mode Output Short Circuit Protection - Cycle-by-Cycle Peak Current Limit - Over Temperature Protection - Ro HS-pliant and Halogen-Free - pact SO8E Package Applications - Non-Isolated Telemunication Buck Regulator - Secondary High-Voltage Post Regulator - Automotive Systems - Electric Bicycle Typical Application VIN : 4.5V ~...