Demonstration circuit DC3151A is a non-synchronous boost plus dual synchronous buck power supply featuring the LTC7811. The demonstration circuit is designed for two buck outputs 5V/10A, 3.3V/7A supplied by a boosted 9.5V output. Benefiting from this feature, the buck outputs can 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 whereas the main buck circuit components fit in an area of ¾" by 1½", while the main boost circuit area is ¾" by 1¾". The package style for the LTC7811 is a 40-pin exposed pad QFN.
The main features of the board include rail tracking (Buck channels only), an internal 5V linear regulator for bias, separate RUN pins for each output, a PGOOD signal (CH1 only), battery monitor and a Mode selector that allow the converter to run in CCM, Pulse-skipping or Burst Mode operation. Spread Spectrum Mode is available for EMI improvement. Synchronization to an external clock is also possible.
The LTC7811 datasheet gives a complete description of this part, its operation and application information. The datasheet must be read in conjunction with the quick start guide for demo circuit 3151.
Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.