The RT9379B is a highly integrated power management IC (PMIC) from Richtek, designed for portable and battery-powered devices requiring efficient power conversion, battery charging, and system management. This PMIC integrates multiple DC-DC converters, a battery charger, and comprehensive protection features into a compact package, making it ideal for space-constrained applications like smartphones, tablets, and wearable devices. It offers enhanced power efficiency and optimized battery life through its advanced design.

Applications

• Smartphones
• Tablets
• Wearable Devices (Smartwatches, Fitness Trackers)
• Portable Media Players
• Low-Power IoT Devices

Features

• Multiple DC-DC Converters: High-efficiency buck converters provide power to core components such as processors, memory, and peripherals.
• Integrated Battery Charger: Supports Lithium-ion and Lithium-polymer batteries with programmable charging parameters.
• Low Quiescent Current: Minimizes power consumption during standby and idle modes, extending battery life.
• I2C Interface: Allows for flexible configuration and monitoring of power rails, charging parameters, and protection features.
• Protection Features: Includes Over-Voltage Protection (OVP), Over-Current Protection (OCP), Short-Circuit Protection (SCP), and Over-Temperature Protection (OTP).
• Compact Package: Available in a small QFN package for space-constrained applications.

Benefits

• High Power Efficiency: Efficient DC-DC converters and low quiescent current minimize power loss and extend battery life.
• Reduced Board Space: Integrated power functions reduce the need for external components, saving board space.
• Flexible Configuration: I2C interface allows for easy configuration and monitoring of key parameters, tailoring the PMIC to specific application requirements.
• Enhanced System Reliability: Comprehensive protection features ensure safe and reliable operation under various conditions.
• Simplified Design: Integrated solution simplifies power management design and reduces time-to-market.

The RT9379B features multiple high-efficiency buck converters that provide power to various system components, ensuring stable and efficient operation. The integrated battery charger supports Lithium-ion and Lithium-polymer batteries and allows for programmable charging parameters, enabling optimized charging profiles tailored to specific battery characteristics. The I2C interface facilitates flexible configuration and monitoring, allowing designers to fine-tune the PMIC for optimal performance in diverse applications. The comprehensive protection features, including Over-Voltage Protection, Over-Current Protection, Short-Circuit Protection, and Over-Temperature Protection, protect the device from potential damage and ensure reliable operation under different operating conditions.

Technical Specifications: The input voltage range typically spans from 2.7V to 5.5V. The operating temperature range is generally from -40°C to +85°C, making it suitable for a wide range of environmental conditions. Specific output voltages and currents for the DC-DC converters are configurable via the I2C interface.