XPhase IC device features power-saving function

The IR3527 IC drives and monitors two phases of a multiphase synchronous buck converter to reduce the overall system cost and the size of the complete solution.

The device implements an independent PSI for each power stage and sequential phase timing for use in single-output multiphase converters.

When the power-saving mode is enabled, the power stage disables its output, eliminating switching losses, while the correct converter operation is maintained by the single power stage or in conjunction with other converter power stages.

The IR3527's current sense amplifiers remain active when in power-saving mode to support adaptive voltage positioning.

Combined with IR's latest-generation XPhase control ICs - such as the IR3502B, which can interface with any number of IR3527 phase ICs - the IR3527 provides a full-featured, flexible and cost-effective way to implement energy-efficient multiphase power solutions that optimise board space, according to the company.

IR's new Gen3 XPhase device features converter output voltage up to 5.1V, loss-less inductor current sensing, feed-forward voltage mode control and integrated bootstrap synchronous PFET.

The IR3527 provides the self calibration of pulse-width-modulation ramp, current share amplifier and single-wire bidirectional average current sharing, as well as a debugging function to isolate the phase from the converter.

The RoHS-compliant device is available in a small, thermally enhanced, 24L 4 x 4mm MLPQ package.