The term PMIC refers to a class of integrated circuits that perform various functions related to power requirements. A PMIC may have one or more of the following functions:
• DC to DC conversion
• Battery charging
• Power-source selection
• Voltage scaling
• Power sequencing
A PMIC may include battery management, voltage regulation, and charging functions. It may include a DC to DC converter to allow dynamic voltage scaling. Some models are known to feature up to 95% power conversion efficiency. Some models integrate with dynamic frequency scaling in a combination known as DVFS (dynamic voltage and frequency scaling).
It might be manufactured using BiCMOS process, or come as QFN package. Some models feature I²C or SPI serial bus communications interface for I/O. Some models feature a low-dropout regulator (LDO), and a real-time clock (RTC) co-operating with a backup battery.
A PMIC can use pulse-frequency modulation (PFM) and pulse-width modulation (PWM). It can use switching amplifier (Class-D electronic amplifier).
VisualSim can model all of these cases with the Power_Manager as the baseline block.
Web: https://en.wikipedia.org/wiki/Power_management_integrated_circuit