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[Other] [Tech Class] Chapter 80: All About Power Management IC In Mobiles

2019-06-19 12:38:01
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Hello MI Fans,
Welcome back to another Tech Class Session, Hope you enjoyed and understood our previous Tech Classes. Today we are back with another interesting topic. Have you ever imagined how the power management is working in a mobile ? Its the role of PMIC, ie The Power Management IC. Before getting into the topic let's see what is an IC ?

What is an IC ?

IC stands for Integrated Circuit. An IC is a semiconductor device that consists of thousands or millions of resistors, capacitors or transistors. The IC’s are of two types, Linear and Digital.
The IC can function as a timer, counter, amplifier, memory etc.

PMIC: Power Management Integrated Circuit

Power management ICs (PMICs) are integrated circuits which includes a wide range of semiconductor devices and power management functions within a single chip. PMICs are frequently used to power small, battery-operated devices since the integration of multiple functions into a single chip results in more efficient use of space and system power. Functions commonly integrated into a PMIC include voltage converters and regulators, battery chargers, battery fuel gauges, LED drivers, real-time clocks, power sequencers, and power control.

Power management ICs are solid state devices that control the flow and direction of electrical power. Many electrical devices have multiple internal voltages for eg. like 5v, 3.3v, 1.8v etc and sources of external power, meaning that the power design of the device has multiple requirements for operation. A PMIC can refer to any chip that is an individual power related function, but generally refer to ICs that incorporate more than one function such as different power conversions and power controls such as voltage supervision and undervoltage protection. By incorporating these functions into one IC, a number of improvements to the overall design can be made such as better conversion efficiency, smaller solution size, and better heat dissipation.

A PMIC may have one or more of the following functions:

  • DC to DC conversion
  • Battery charging
  • Power-source selection
  • Voltage scaling
  • Power sequencing


Low-power PMIC’s provide optimized power management for space-constrained applications such as wearables, hearables, sensors, and IoT devices. Low operating current, high-efficiency power conversion, and compact form factors are critical for devices that run primarily on small batteries.

PMICs based on the single-inductor, multiple-output (SIMO) architecture use a single inductor as the energy-storage element for multiple, independent DC outputs. The use of fewer inductors can shrink power supply size as much as 50%. In addition, low quiescent current helps to extend the battery life of your space-constrained designs.

Wearable PMICs offer regulators with single-inductor topologies which maximize efficiency. Multiple ultra-low quiescent current regulators with optimal efficiency minimize overall power consumption and extend battery life. By integrating efficient regulation with battery charging, smart power control, and power-optimized peripherals, wearable PMICS provide many options to create space-optimized solutions for always-on battery-operated devices such as fitness monitors, hearables, smart watches.


High-performance PMICs maximize performance per watt while increasing system efficiency for computationally intensive platforms such as systems-on-chip (SoCs), FPGAs, and application processors.

Our scalable power-management ICs provide multiple power rails and power management functions while consuming up to 40 percent less power than standard solutions. These high-performance PMICs extend battery life in the most compact form factor. They support a wide variety of applications including augmented/virtual reality (AR/VR), gaming, SSDs.

Some of the PMIC manufacturers are listed below

  • Samsung Semiconductor
  • Ricoh Electronic Devices
  • STMicroelectronics
  • Infineon Technologies AG
  • Intel
  • Marvell Semiconductor
  • Qualcomm
  • MediaTek
  • Freescale Semiconductor

Hope you understood the topic, we will be back with another soon.

Source: 1, 2

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2019-06-19 12:38:01
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Master Bunny

J C Paul | from Redmi Note 4


This article is undoubtedly instructive. Thanks for sharing.
2019-06-19 13:48:52

Master Bunny

5203933800 | from Redmi Note 5 Pro


Thanks for sharing
2019-06-19 21:28:57

Semi Pro Bunny

pradeepn17 | from app


on the dot & detailed..thanks for the info..
2019-06-19 23:47:30

Grandmaster Bunny

Solver13 | from Redmi Note 4


Interesting thread!
2019-06-20 01:48:18

App Review Team

Maji George | from Redmi 3S


Well explained article
2019-06-20 11:58:42

Pro Bunny

Sharon Anto | from Redmi 6 Pro


Nice, thanks for the information
2020-03-17 13:58:15
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