The PM8917 is a Power Management Integrated Circuit (PMIC) designed to efficiently manage power distribution and battery charging in portable electronic devices. It provides multiple regulated voltage outputs, battery charging capabilities, and various protection features to ensure reliable operation.

Applications

• Smartphones
• Tablets
• Portable Navigation Devices (PNDs)
• Portable Media Players (PMPs)
• Other Battery-Powered Devices

Features

• Multiple Voltage Regulators: Provides several regulated voltage outputs to power different components.
• Integrated Battery Charger: Includes a battery charging circuit with charging control and protection.
• Power Sequencing: Ensures components are powered on/off in the correct sequence.
• Over-Voltage and Over-Current Protection: Protects the device from damage due to voltage or current surges.
• I2C Interface: Allows for communication and control of the PMIC via an I2C serial interface.
• Low Quiescent Current: Designed for minimal power consumption in standby mode.

Benefits

• Extended Battery Life: Optimizes power consumption for longer battery life.
• Enhanced System Reliability: Protects the device from power-related failures.
• Reduced Component Count: Integrates multiple power management functions into a single chip.
• Simplified Design: Simplifies the design and layout of the power supply circuitry.
• Improved System Performance: Enhances overall system performance and stability.

The PM8917 typically incorporates a combination of buck converters, boost converters, and LDO regulators to generate the required voltage levels. It also includes battery fuel gauging and thermal management features. The integrated I2C interface allows the system to monitor voltage levels, current consumption, and temperature, as well as to control various power settings.