DC952A

DC952A demonstration circuit is a current mode synchronous switching regulator featuring the LTC3810. The circuit is configured as a synchronous step-down regulator operating at 230KHz switching frequency. Output voltage is 12V at 6A maximum load. The input voltage range is 13V to 80V. The operating mode can be selected with jumper JP1. Depending on the position of this jumper, at low load the circuit will operate in forced continuous mode (for best load transient response at low current) or in pulse skip mode (for best efficiency at low current). With jumper JP1 in the mid-position the circuit can synchronize to an external clock signal on the Mode/Sync pin. A power good output is provided. The PGOOD output is normally high, with a pull up resistor to VLOGIC. If the output voltage is not within ±10% of nominal value the PGOOD signal will go low. The circuit can be synchronized to an external clock signal.

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