ADP3168 6-Bit, Programmable 2-, 3-, 4-Phase Synchronous Buck Controller IC

The ADP3168 is a multiphase synchronous buck switching regulator controller with great efficiency. This IC is designed to convert a 12 V main supply to the core supply voltage required by Intel CPUs with excellent performance. It has an integrated 6-bit DAC that allows it to read a voltage identification (VID) code from the processor and set the output voltage between 0.8375 V and 1.6 V. In addition, the logic level outputs are driven by a multimode PWM design with a customizable switching frequency that is optimised for VR size and efficiency. The phase relationship of the output signals is designed to provide 2, 3, or 4-phase operation, allowing up to four complementary buck switching stages to be developed.

The ADP3168 also features programmable no-load offset and slope functions to adjust the output voltage as a function of the load current so that it always optimally positioned for a system transient. The ADP3180 also has adjustable current limiting and accurate and dependable short circuit protection. And also a delayed Power Good output that accommodates on-the-fly output voltage changes requested by the CPU. ADP3168 is a 28-lead TSSOP package designed to operate in a commercial temperature range of 0°C to 85°C.

Once normal operation begins, the ADP3168’s PWM outputs function as logic-level devices. The detection is normal, and it’s designed to power external gate drivers like the ADP3418. Because each phase is monitored independently, operation with a duty cycle approaching 100% is conceivable. For overlapping phases, more than one output can be turned on at the same time.

APPLICATIONS

Desktop PC Power Supplies for:

1. Next Generation Intel® Processors
2. VRM Modules