Linear Technology
DC2346A - LT8601EUJ Demo Board | Triple Sync Buck, 6V ≤ VIN ≤ 24V, 5Vout1 @ 1.5A, 3.3Vout2 @ 2.5A and 1.8Vout3 @ 1.8A, 2MHz FSW
Manual
LT8601 - Product Info
LTspice - Software