Sync Buck for Hard Drive Tester 5V@5A and 3.3V@5A

The PMP3866 reference design is a dual synchronous buck that uses the TPS40140 to generate 5V@5A and 3.3V@5A. The input voltage range is 18V to 30V. This design is used in a hard drive tester application. The two power supplies operate 180 degrees out of phase with each other to reduce the input