Chipset provides Intel-compliant multiphase power

The ADP3168 and ADP3418 work together to form a highly efficient multiphase synchronous buck switching regulator to meet Intel's VRD/VRM 10 power specifications.

The ADP3168 and ADP3418 work together to form a highly efficient multiphase synchronous buck switching regulator to meet Intel's VRD/VRM 10 power specifications.

These devices have been optimised for converting a 12V main supply into the highly accurate core supply voltage required by Intel's next-generation processors.

Temperature-compensated inductor current sensing provides high accuracy at the lowest system cost.

The ADP3168 reads the voltage identification (VID) code directly from the processor and sets the output voltage between 0.8375 and 1.6V.

The Flex-mode PWM architecture provides a highly stable, high-speed control loop that drives the logic level outputs at up to 1MHz per phase while meeting Intel's tough transient requirements with the fewest possible output capacitors.

The phase relationship of the output signals can be programmed to provide two-, three- or four-phase operation.

Additional features include accurate and reliable short circuit protection, adjustable current limiting, and a delayed Power Good output that accommodates on-the-fly output voltage changes requested by the CPU.

The ADP3418 provides the interface and high-current drive to control external power mosfets.

This driver also includes a new output disable function, which allows for controlled shutdown with no negative voltage spikes on the CPU power supply rail.

The ADP3168 and ADP3418 are specified over the commercial temperature range of 0 to +85C and are available in 28-lead TSSOP and SO-8 packages, respectively.

The ADP3168 and ADP3418 are priced at $1.42 and $0.60, respectively, per unit in 1000-piece quantities.

Samples and prototype quantities are available now, with production quantities available in October 2002.

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