The Primarion Di-POLTM PX7522 Power IC is a highly
configurable Digital Point-of-Load (POL) Controller with two
loops and two PWM outputs for use in high current buck
converter topologies with either DCR or RDSon current sense
applications. For the DCR current sense, the output range is
from 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, the
PX7522 supports two independent outputs with single phase
control for each output. In single-loop mode, the PX7522 can
provide a single output rail with up to two phases. Chip-to-chip
current sharing with up to four phases can be interleaved
synchronously for multiphase operation. The PX7522 provides
PMBus? POL power regulation and supports current sharing
to balance the power supply currents.
The PX7522 utilizes digital technology to implement all control
functions, providing the ultimate in flexibility and stability. The
PX7522 incorporates an industry standard PMBus? serial
interface for real-time system control. Through the serial
interface, the power supply designer can quickly optimize
designs while monitoring system performance without having
to make any hardware adjustments.
The PX7522 provides superior accuracy through internal
calibration that measures and corrects current sense error
sources upon startup. The PX7522 has programmable current
sense temperature compensation that allows the designer to
tailor the response for best accuracy over temperature.
Superior accuracy reduces component count and solution
cost.