Power management IC
|This article needs additional citations for verification. (December 2012)|
||This article needs attention from an expert in Electronics. The specific problem is: The article only explains what a PMIC 'may' contain or possible physical and technological features, but doesn't especially explain anything about the ICs themselves. (February 2009)|
Power Management ICs (PMICs) are integrated circuits (or a system block in a system-on-a-chip device) for managing power requirements of the host system. A PMIC is often included in battery operated devices such as mobile phones and portable media players.
Many modern electronic devices have multiple internal voltages and sources of external power. Common voltages for electronics are 5 V, 3.3 V, 1.8 V, etc. Many modern gadgets also have various sources of power to charge their batteries including USB. Power management IC is a generic term for a class of integrated circuits, that perform the various functions related to the 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
- Miscellaneous functions
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).
Freescale Semiconductor, Dialog Semiconductor, International Rectifier, Intersil, Maxim Integrated Products, Linear Technology, Renesas Electronics, Rohm Semiconductor, and Texas Instruments are some of many manufacturers of PMICs.
|This electronics-related article is a stub. You can help Wikipedia by expanding it.|