MICROCHIP MCP73831T Charge Management Controller IC, SOT-23-5, 6V, 500mA

The MICROCHIP MCP73831T-2ACI/OT is a highly advanced linear charge management controller designed for space-limited and cost-sensitive applications. It provides a reliable, fully integrated solution for charging single-cell lithium-ion or lithium-polymer batteries.

This device employs a sophisticated constant-current/constant-voltage (CC/CV) charge algorithm. This method ensures a safe and efficient charging cycle, prolonging battery life and health. The controller features selectable preconditioning and charge termination, adding flexibility for different battery chemistries and states.

Key Integrated Features

• Integrated Pass Transistor: Simplifies the external circuitry required, reducing the overall component count and board space.
• Integrated Current Sense: Provides accurate charge current regulation without the need for an external sense resistor.
• Reverse Discharge Protection: Prevents battery drain back through the charger when input power is removed, a critical feature for maintaining battery charge in portable devices.
• Tri-state Output: Offers clear status indication for charge conditions.
• Automatic Power-down: Minimises power consumption when no battery is present or charging is complete.
• Thermal Regulation: Protects the IC by automatically reducing the charge current if the device temperature exceeds safe limits, ensuring reliable operation under varying environmental conditions.

Housed in a compact SOT-23-5 surface-mount package, this controller is ideal for modern, miniaturised electronics. It operates across a wide temperature range from -40°C to +85°C, making it suitable for demanding industrial and consumer applications. Its combination of protection features, integrated components, and robust design makes it a cornerstone for safe and efficient portable power management.