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DC2243A - LT3668EMSE DLT3668EMSE Demo Board | Buck Plus Dual Post-Regulator LDOs, 7V ≤ VIN ≤ 40V; VOUT1 = 6V @ 0.4A, VOUT2 = 5V @ 0.2A, VOUT3 = 5V @ 0.2Aemo Board | 7V ≤ VIN ≤ 40V; VOUT1 = 6V @ 0.4A, VOUT2 = 5V @ 0.2A, VOUT3 = 5V @ 0.2A

Demonstration circuit 2243A is a triple power supply that includes one 400mA step-down regulator and two 200mA low dropout (LDO) linear tracking regulators featuring the LT®3668. The demo circuit is designed for one 6V and dual 5V outputs from a 7V to 40V input. Two LDO outputs are configured as post-regulators of the switching regulator output. The total current capability of three output channels is up to 400mA, while the two LDO regulators are capable of 200mA each.

DC2243A - Schematic