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USRB04 - HIGH PRECISION PRECISION LOW POWER SWITCH

General Description

USRB04 is a high performance, high precision and low cost PWM Power switch for non-isolated buck and buck-boost application.

It combines a dedicated current mode PWM controller with a high voltage power Bipolar in SOP8 package.

Key Features

  • S.
  • Universal AC input range and 5.0V output voltage.
  • Constant power mode operation at over load.

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Full PDF Text Transcription (Reference)

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UNISONIC TECHNOLOGIES CO., LTD USRB04 Preliminary HIGH PRECISION PRECISION LOW POWER SWITCH  DESCRIPTION USRB04 is a high performance, high precision and low cost PWM Power switch for non-isolated buck and buck-boost application. It combines a dedicated current mode PWM controller with a high voltage power Bipolar in SOP8 package. Its built-in error amplifier is optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA, constant voltage regulation of 5.0V at universal AC input can be guaranteed. Frequency reduction and burst mode control is implemented for high efficiency at light load.