Linear Technology
DC2268A-E - LTM4630EY-1 Demo Board | 1.5" x 1.2" PCB, Dual 18A/Single 36A Buck μModule Regulator, 4.5V≤VIN≤15V, Vout1 = 1V @ 18A, Vout2 = 1.5V @ 18A
Manual
LTM4630-1 - Product Info
LTspice - Software