ISL85403 Synchronous Buck/Boost Buck Converter

Renesas Electronics ISL85403 Synchronous Buck or Boost Buck Converter is a 36V, 2.5A synchronous buck or boost buck controller with a high-side MOSFET and low-side driver integrated. In buck mode, the ISL85403 supports a wide input range of 3V to 36V. In boost-buck mode, the input range can be extended down to 2.5V, and output regulation can be maintained when V_IN drops below V_OUT, enabling sensitive electronics to remain on in low input voltage conditions. The ISL85403 has a flexible selection of operation modes of forced PWM mode and PFM mode. In PFM mode, the quiescent input current is as low as 180μA (AUXVCC connected to V_OUT). The load boundary between PFM and PWM can be programmed to cover wide applications.