The Microchip MCP73831T-2ACI/OT is a highly integrated linear charge management controller designed for use in space-limited and cost-sensitive applications. This miniature single-cell, fully integrated Li-Ion, Li-Polymer charge management controller provides a compact solution for charging batteries from both USB and AC adapter sources.

Key Features

• Advanced Charge Management: The MCP73831 simplifies the charge management process for modern rechargeable batteries, offering a constant-current/constant-voltage operation with thermal regulation to maximize charge rate without risk of overheating.
• Programmable Charge Current: The device allows programming of the charge current from 15mA to 500mA via an external resistor, providing flexibility for different battery capacities and sizes.
• High Accuracy: It boasts high voltage regulation accuracy of ±0.75%, ensuring precise charging and longer battery life.
• LED Status Indicator: An on-chip LED driver indicates the charge status, providing visual feedback during the charging process.
• Automatic Power-Down: The MCP73831T-2ACI/OT automatically enters a low-current power-down mode when the charge cycle completes, conserving energy and extending battery life.
• Over-Temperature Protection: The device includes thermal regulation, which protects the IC and the battery being charged from overheating.
• Compact Form Factor: Available in a tiny 5-pin SOT-23 package, it is ideal for portable applications where space is at a premium.

Applications

The MCP73831T-2ACI/OT is suitable for a wide range of applications due to its small size and comprehensive feature set. It is commonly used in portable electronics such as Bluetooth headsets, wearable technology, smartwatches, fitness trackers, and other devices that require efficient, reliable battery charging capabilities.

Technical Specifications

• Package: 5-pin SOT-23
• Input Voltage: 3.75V to 6.0V
• Charge Current (programmable): 15mA to 500mA
• Charge Voltage Regulation: 4.2V ±0.75%
• Operating Temperature Range: -40°C to +85°C

Overall, the MCP73831T-2ACI/OT from Microchip Technology is a robust and versatile charging solution that offers precision, efficiency, and convenience for managing the power needs of modern rechargeable batteries.