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SY21061 - Asynchronous Buck Converter

General Description

The SY21061 high-efficiency asynchronous Buck converter can deliver 1.2A output current over a wide input voltage range from 5V to 40V.

The SY21061 employs a constant off-time and peak current mode control strategy to achieve fast transient responses.

Key Features

  • Low RDS(ON) for Internal N-channel Power FET: 180mΩ.
  • 5V to 40V Input Voltage Range.
  • Up to 1.2A Output Current.
  • 800kHz 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.
  • RoHS-Compliant and Halogen-Free.
  • Compact SOT23-6 Package.

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Datasheet Details

Part number SY21061
Manufacturer Silergy
File Size 970.79 KB
Description Asynchronous Buck Converter
Datasheet download datasheet SY21061 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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SY21061 High Efficiency, 800kHz, 1.2A, 40V Input Asynchronous Buck Converter General Description The SY21061 high-efficiency asynchronous Buck converter can deliver 1.2A output current over a wide input voltage range from 5V to 40V. The SY21061 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 800kHz switching frequency permits low output voltage ripple and reduces external inductor and capacitor sizes. The SY21061 also provides cycle-by-cycle current limiting, over temperature protection, and output short circuit protection. The SY21061 is available in a compact SOT23-6 package.