SY21173 - Silergy

SY21173 Asynchronous Buck Converter

The SY21173 high-efficiency asynchronous Buck converter can deliver 3A output current over a wide input voltage range from 4.5V to 60V. The SY21173 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 adjustable switching frequency .

Features

● Low RDS(ON) for Internal N-Channel Power FET: 150mΩ
● 4.5V to 60V Input Voltage Range
● Up to 3A Output Current Capability
● Constant Off-Time and Peak-Current Mode Control
● Internal Soft-Start Limits the Inrush Current
● ±1% 0.8V Reference
● Adjustable Switching Frequency Range: 100kHz to 1MHz
● EN ON/OFF Control with Accurate Threshold
● Hiccup Mode Output Short Circuit Protection
● Cycle-by-Cycle Peak Current Limit
● RoHS-Compliant and Halogen-Free
● Compact Package: SO8E Applications
● Non-Isolated Telecommunication Buck Regulator
● Secondary High-Voltage Post Regulator
● Automotive Sy.