dc1050a DC1050A LT3503EDCB Demo Board | 4.5 ≤ VIN ≤ 20V, VOUT = 3.3V at 1.2A Demonstration circuit 1050 is a monolithic step-down DC/DC switching regulator featuring the LT3503. The demo board is designed for a 3.3V/1.2A output from a 4.5V to 20V input. The 2.2MHz switching frequency allows the use of small, low cost external components and results in a low, predictable output ripple. DC1050A