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ISL85403 - 2.5A Regulator

General Description

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Key Features

  • Buck mode: input voltage range 3V to 40V (See “Input Voltage” for more details).
  • Boost mode expands operating input voltage lower than 2.5V (See “Input Voltage” for more details).
  • Selectable Forced PWM mode or PFM mode.
  • 300µA IC quiescent current (PFM, no load); 180µA input quiescent current (PFM, no load, VOUT tied to AUXVCC).
  • Less than 5µA (MAX) shutdown input current (IC disabled).
  • Operational topologies - Synchronous buck - Non-synchrono.

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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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DATASHEET ISL85403 2.5A Regulator with Integrated High-side MOSFET for Synchronous Buck or Boost Buck Converter FN8631 Rev.4.00 Sep 28, 2020 The ISL85403 is a 40V, 2.5A synchronous buck or boost buck controller with an integrated high-side MOSFET and low-side driver. In Buck mode, the ISL85403 supports a wide input range of 3V to 40V. In Boost-Buck mode, the input range can be extended down to 2.5V and output regulation can be maintained when VIN drops below VOUT, enabling sensitive electronics to remain on in low input voltage conditions. The ISL85403 has a flexible selection of Forced PWM mode and PFM mode. In PFM mode, the quiescent input current is as low as 180µA (AUXVCC connected to VOUT). The load boundary between PFM and PWM can be programmed to cover wide applications.