dc392a-b DC392A-B LTC3728EUH Demo Board | Dual Output, 5V to 24VIN, 5VOUT1 @ 4A, 3.3VOUT2 @ 5A Demonstration circuit 392 is a dual output, step-down, synchronous buck converter featuring either the 150kHz to 300kHz LTC1628EUH controller (DC392A-A), the 250kHz to 550kHz LTC3728EUH (DC392A-B) or 250kHz to 550kHz LTC3728LUH (DC392A-C). It operates with an input voltage range of 7V to 24V and provides 3.3V @ 5A and 5V @ 4A at its output. DC392A-B