3 Measurements

In the following, measurements are shown comparing the performance of an I2C programmed fixed output voltage converter with a configuration using a resistive divider to increase the output voltage. For the measurements, the TPS62873 Buck Converter Evaluation Module User's Guide was used. Both converters are configured for a default startup voltage of 1 V as described in the configuration example in the Section 2 section. To implement this modification on the TPS62873 Buck Converter Evaluation Module User's Guide, a 47 kΩ resistor is used for R5 and R6 is removed. The I2C version is reprogrammed to an output voltage of 1.2 V before startup, and the change of the output voltage in the adjustable version is done with a resistor divider using 10 kΩ for R11, 2 kΩ for R12 and 1 nF for Cff. For the higher output voltage, the components in the compensation network were changed to 1.5 kΩ for R1 and 3.9 nF for C1. All other components remained unchanged.