关键词: margining capability, dc-dc converters, D/A converters, DACs, current-output DACs
Abstract: You can easily add margining capability (digital adjustment of the output voltage) to a DC/DC converter by adding a 2- or 4-channel, I²C-adjustable current DAC (DS4402 or DS4404) at the converter's feedback input. Because each DAC output is 0mA at power up, the extra circuitry is transparent to the system until a command is written via the I²C bus.
Add Margining Capability to a DC DC Converter.pdf 
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