DC2738A: 3.3V @ 8A, 5V @ 8A, 10V @ 7A, 4.5 ~ 36 Vin, Buck/Boost

DC2738A is a triple output synchronous step-up/dual step-down supply featuring the LTC7815. The demonstration circuit is designed for two buck circuits VOUT1 5V @ 8A and VOUT2 3.3V @ 8A outputs supplied by a boost circuit VOUT3 10V @ 7A output. (If VIN is higher than 10V then VOUT3 equals to VIN.) Benefiting from this feature, the buck outputs are able to maintain regulation over a wide input voltage range of 4.5V to 36V which is suitable for automotive or other battery fed applications. Also, the demonstration circuit uses a drop-in layout that the main buck circuit components fit in an area of three-quarter inches by 1.5 inches, while the main boost circuit area is three-quarter inches by 1.75 inches.

The main features of the board include rail tracking (buck channels only), an internal 5V linear regulator for bias, separated RUN pins for each output, a PGOOD signal (CH1 only), an over voltage indicator for CH3 and a mode selector that allow the converter to run in CCM, pulse-skipping or Burst Mode® operation. Synchronization to an external clock is also possible. The LT7815 data sheet gives a complete description of these parts, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 2738A.