LINEAR TECHNOLOGY DC1144A-B

The DC1144A-B is a Demonstration Board for LT3580EDD a boost/inverting DC/DC converter. The demo circuits demonstrate small size and low component count. The boost is designed to convert a 3 to 10V source to 12V at 300mA while the inverter converts a 5 to 12V source to -12V at 350mA. Both converters use only one feedback resistor to set the output voltage. The LT3580 operates with inputs as high as 32V but in these demo boards the input is limited by the voltage rating of the input capacitors and the magnitude of the boost output. In a boost converter the input needs to be less than the output. Care must be taken when operating the LT3580 at high input voltages as the junction temperature increases due to higher internal dissipation. Higher switching frequencies also increase the internal dissipation.