OptiMOS™ IPOL single-voltage synchronous buck regulator 25 A with PMBus interface The TDA38725 OptiMOS™ IPOL is a fully integrated, highly efficient synchronous buck regulator with PMBus interface supporting up to 25 A. It's used for Intel VR12, VR 12.5, VR13, VR14, IMPVP8 designs and DDR Memory without minor change to the bill of materials. The selected mode configures the pin-out, VID table and other relevant functions, reducing time-to-market & eliminating the need to manage different inventories.