Silergy SY21173
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.| Part No. | SY21173 |
|---|---|
| Datasheet | SY21173 Download |
| Manufacturer |  Silergy |
| Description | Asynchronous Buck Converter |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The adjustable switching frequency permits low output-voltage ripple and reduces external inductor and capacitor sizes. The SY21173 also provides cycle-by-cycle current limiting, over temperature protection, and output short circuit protection. The SY21173 is available in a compact SO8E package.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 Systems
● Electric Bicycle Typical Application VIN : 4.5V ~ 60V CIN RPG ON/OFF IN PG EN GND BS CBS L LX D FB FS RFS RH CFF RL Figure 1.
