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SY21173 - Asynchronous Buck Converter

Datasheet Summary

Description

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.

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-Fr.

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Datasheet Details

Part number SY21173
Manufacturer Silergy
File Size 1.26 MB
Description Asynchronous Buck Converter
Datasheet download datasheet SY21173 Datasheet
Additional preview pages of the SY21173 datasheet.

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Full PDF Text Transcription

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SY21173 High-Efficiency, 3A, 60V Input Asynchronous Buck Converter General Description 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 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.
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