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FR9809 Datasheet 500KHz Synchronous PWM-Buck DC/DC Converter

Manufacturer: Fiti

Overview: fitipower integrated technology lnc. FR9809 21V, 5A, 500KHz Synchronous PWM-Bu8c5kT DC/DC.

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Datasheet Details

Part number FR9809
Manufacturer Fiti
File Size 1.16 MB
Description 500KHz Synchronous PWM-Buck DC/DC Converter
Download FR9809 Download (PDF)

General Description

FR9809 is a high-efficiency synchronous step-down DC/DC converter that employs a special process technique to obtain very low RDS(ON) for the internal metal–oxide–semiconductor field-effect transistor (MOSFET).

The input operation voltage is in a wide range from 4.75V to 21V, and continuous load current capability is 5A.

Control circuit is designed by a particular current mode which provides fast transient response and eases loop stabilization.

Key Features

  • High Efficiency up to 90%.
  • Internal MOSFET RDS(ON): 110mΩ 20mΩ.
  • Internal Compensation.
  • Input Operation Voltage Range: 4.75V to 21V.
  • 5A Continuous Output Current.
  • Output Voltage down to 0.805V.
  • 500KHz Oscillation Frequency.
  • Sync to External Clock from 300KHz to 800KHz.
  • Cycle-by-Cycle Current Limit.
  • Under Voltage Lockout.
  • Over-Temperature Protection with Auto Recovery.

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