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SY21019 - 300mA Asynchronous Buck Converter

General Description

The SY21019 high-efficiency asynchronous Buck converter can deliver 300mA output current over a wide input voltage range from 5V to 40V.

The SY21019 employs a constant off-time and peakcurrent mode control strategy to achieve fast transient responses.

Key Features

  • Low RDS(ON) for Internal N-Channel Power FET: 2Ω.
  • 5V to 40V Input Voltage Range.
  • Up to 300mA Output Current.
  • 2MHz 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.

📥 Download Datasheet

Datasheet Details

Part number SY21019
Manufacturer Silergy
File Size 1.06 MB
Description 300mA Asynchronous Buck Converter
Datasheet download datasheet SY21019 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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SY21019 High-Efficiency, 2MHz, 40V Input, 300mA Asynchronous Buck Converter General Description The SY21019 high-efficiency asynchronous Buck converter can deliver 300mA output current over a wide input voltage range from 5V to 40V. The SY21019 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 2MHz switching frequency permits low outputvoltage ripple and reduces external inductor and capacitor sizes. The SY21019 also provides cycleby-cycle current limiting, over temperature protection, and output short-circuit protection. The SY21019 is available in a compact SOT23-6 package.