Battery Management

A Power Management IC (PMIC), or power management integrated circuit, is a core chip designed to provide efficient power conversion, distribution, and monitoring for electronic devices. It integrates multiple power management functions, significantly extending battery life by optimizing power consumption and ensuring accurate and stable system voltages.

 

1. What are the Core Functions of Power Management ICs (PMIC)?

1) Power Conversion and Distribution

Integrated DC-DC converters (buck/boost/boost-boost), low-dropout linear regulators (LDOs), and other modules support multiple voltage rails to accommodate diverse loads such as processors and sensors.

 

Dynamic voltage regulation technology adjusts the power supply in real time based on system load, reducing inefficient energy consumption.

 

2) Battery and Charging Management

Monitors battery charge, temperature, and health status for intelligent charge and discharge control and overcharge/over-discharge protection.

 

Compatible with multiple input sources (such as USB and wireless charging), it optimizes charging efficiency.

 

3) System-Level Protection and Control

Built-in overvoltage, undervoltage, overcurrent, and overtemperature protection circuits enhance device reliability.

 

Communicates with the main control chip via I²C/SPI interfaces to coordinate power sequencing for each module.

 

2. Typical Application Scenarios of Power Management ICs (PMIC)

PMICs are widely used in portable devices (mobile phones, tablets), IoT terminals, and industrial control systems. Their high integration can replace multiple discrete power components, reducing PCB area and simplifying design.