JAJSON3 May 2022 DAC53001 , DAC53002 , DAC63001 , DAC63002
PRODUCTION DATA
A power-supply margining and scaling circuit is used to trim, scale, or test the output of a power converter. This example circuit is used to test a system by margining the power supplies for adaptive voltage scaling or to program a desired value at the output. Adjustable power supplies, such as low-dropout regulators (LDOs) and DC/DC converters, provide a feedback or adjust the input that is used to set the desired output. A precision voltage-output DAC is the best choice for controlling the power-supply output linearly. Figure 8-1 shows a control circuit for a switch-mode power supply (SMPS) using the DACx300x. Typical applications of power-supply margining are communications equipment, enterprise servers, test and measurement, and general-purpose power-supply modules.