OptiMOS™ IPOL single-output synchronous buck regulator 25 A with PMBus interface OptiMOS™ IPOL TDA38725A is an easy-to-use, fully integrated, highly efficient 25 A synchronous buck regulator with PMBUS Compliance. A proprietary fast COT engine enables a fast transient response and reduces the board footprint. TDA38725A offers best-in-class efficiency by using OptiMOS™ FETs, optimized for low-voltage high-current applications. Extensive protection features provide system-level security under fault conditions.