Linear Technology
DC2481A-A - LTM4677/LTM4650 Demo Board | Buck μModule Regulator with Digital PSM, LTM4677 + LTM4650, 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 1.8V @ 86A
Manual
LTM4650 - Product Info
LTM4677 - Product Info
LTspice - Software