DC1818A

LINEAR TECHNOLOGY DC1818A Evaluation Board, Step Down Converter, LDO, 5A Switching Regulator, Five 1.1A Low Noise LDOs

The demonstration circuit features LTM8001EY µModule regulator. The LTM8001EY is a 36VIN, 5A step down µModule regulator with a five output configurable LDO array. The DC1818A is configured so the switching regulator provides an output that also powers the LDOs. The LDOs in turn provide three outputs, one from a single LDO and two outputs each formed by paralleling two LDOs together. The board supports changes to the LTM8001EY "s user adjustable features including output voltage of the switching regulator, output voltage of each of five LDOs, switching frequency, soft start period and output current limit of the switching regulator simply by modifying the appropriate resistors or capacitor. It also supports all current sharing or independent operation options of the LDOs. DC1818A includes a BNC connector for noise measurement of the LDO for VOUT1. An optional capacitor at C14 further reduces output noise.

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84% efficiency

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Switching frequency of 350KHz

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Wide input voltage range from 6V to 36V

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Adjustable 10% accurate output current limit

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Constant current constant voltage operation

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Five 1.1A parallelable outputs

If VOUT0 is too low, temporarily disconnect the loads to make sure that the loads are not set too high.