Read this datasheet to learn about DC Power/Energy Measurement for Multiple Voltage Rails.
Power Needs to Be Measured Before It Can Be Managed
Actively measuring DC power is proving to be a key advantage in saving overall system power. By understanding the power consumption differences between light system loads and heavy system loads, a system design can configure functional blocks to lower power states and overall system power.
Microchip’s PAC1932/3/4 are multichannel power sensors with a wide dynamic measurement range. This makes it possible to measure a 1V microprocessor voltage on one channel and a 20V battery voltage simultaneously on a different channel.