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UC3655 - 500mA SYNCHRONOUS STEP-DOWN DC/DC CONVERTERS

General Description

The UTC UC3655 is a synchronous-rectification type DC/DC converters with a built-in 0.6Ω P-channel driver transistor and 0.7Ω N-channel switching transistor, which designed to allow the use of ceramic capacitors.

Key Features

  • >.
  • Very High Efficiency 92%.
  • Low Ripple Rejection Voltage 10mV.
  • Output Current 500mA @VIN=3.0V, VOUT=1.8V.
  • Oscillation Frequency is 1.3MHz.
  • With PWM / PFM Automatic Switching Control.
  • Maximum Duty Ratio is 100%.
  • Ceramic Capacitor Available.

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UNISONIC TECHNOLOGIES CO., LTD UC3655 500mA SYNCHRONOUS STEP-DOWN DC/DC CONVERTERS  DESCRIPTION The UTC UC3655 is a synchronous-rectification type DC/DC converters with a built-in 0.6Ω P-channel driver transistor and 0.7Ω N-channel switching transistor, which designed to allow the use of ceramic capacitors. Using only a coil and two capacitors connected externally, the UC3655 enable a high efficiency, stable power supply with an output current of 500mA to be configured. Its operating voltage is 2.0V and the output voltage is programmable in a range from 0.9V to 4.0V in increments of 0.1V (accuracy: ±2.0%) internally. The oscillation frequency is 1.3MHz.