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SY8891 - 5.5V/1A Synchronous Step Down Regulator

General Description

The SY8891 is a high efficiency 1.5MHz synchronous step down DC/DC regulator, capable of delivering up to 1A output current.

It can operate over a wide input voltage range from 2.5V to 5.5V and integrate main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss.

Key Features

  • 2.5V to 5.5V Input Voltage Range.
  • 55μA Low Quiescent Current.
  • Low RDS(ON) for Internal Switches (Top/Bottom): 170mΩ /100mΩ.
  • High Switching Frequency 1.5MHz Minimizes the External Components.
  • Internal Soft-start Limits the Inrush Current.
  • 100% Dropout Operation.
  • Power Good Indicator.
  • Hic-cup for Short Circuit Protection.
  • Output Auto Discharge Function.
  • RoHS Compliant and Halogen Free.
  • Compact Package: SOT563.

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Datasheet Details

Part number SY8891
Manufacturer Silergy
File Size 774.82 KB
Description 5.5V/1A Synchronous Step Down Regulator
Datasheet download datasheet SY8891 Datasheet

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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SY8891 High Efficiency, 1.5MHz 5.5V/1A Synchronous Step Down Regulator General Description The SY8891 is a high efficiency 1.5MHz synchronous step down DC/DC regulator, capable of delivering up to 1A output current. It can operate over a wide input voltage range from 2.5V to 5.5V and integrate main switch and synchronous switch with very low RDS (ON) to minimize the conduction loss. The SY8891 is in a space saving, low profile SOT563 package. Ordering Information SY8891 □(□□)□ Tempera ture Code Pa cka ge Code Optional Spec Code Ordering Number Package type Note SY8891ARC SOT563 -- Typical Application VIN: 2.5-5.5V CIN 10μF/6.3V RPG 100k ON/ OFF L1:2.2µH VIN LX RH 100k PG FB RL 49.9k EN GND VOUT:1.8V Cff COUT 22pF 10μF/6.3V Figure1.