The Primarion Di-POLTM PX7522 Power IC is a highlyconfigurable Digital Point-of-Load (POL) Controller with twoloops and two PWM outputs for use in high current buckconverter topologies with either DCR or RDSon current senseapplications. For the DCR current sense, the output range isfrom 0.5V to [Vcc – 0.9V] and for the RDSon current sense,the output range is from 0.5V to 8V. In dual-loop mode, thePX7522 supports two independent outputs with single phasecontrol for each output. In single-loop mode, the PX7522 canprovide a single output rail with up to two phases. Chip-to-chipcurrent sharing with up to four phases can be interleavedsynchronously for multiphase operation. The PX7522 providesPMBus™ POL power regulation and supports current sharingto balance the power supply currents.The PX7522 utilizes digital technology to implement all controlfunctions, providing the ultimate in flexibility and stability. ThePX7522 incorporates an industry standard PMBus™ serialinterface for real-time system control. Through the serialinterface, the power supply designer can quickly optimizedesigns while monitoring system performance without havingto make any hardware adjustments.The PX7522 provides superior accuracy through internalcalibration that measures and corrects current sense errorsources upon startup. The PX7522 has programmable currentsense temperature compensation that allows the designer totailor the response for best accuracy over temperature.Superior accuracy reduces component count and solutioncost.
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