MCP73834-FCI/UN

Overview

The MCP73834-FCI/UN is a linear lithium-ion and lithium-polymer battery charge management controller manufactured by Microchip Technology. It operates within a supply voltage range of 3.75 V to 6 V and provides a regulated output voltage of 4.2 V with a maximum output current of 1.2 A. The device is housed in a compact 10-pin MSOP package, measuring 3 mm x 3 mm x 0.95 mm. It supports standard charging profiles including constant current and constant voltage phases with automatic termination. The component functions reliably across an operating temperature range from -40 °C to +85 °C.

Feature Summary

• Implements complete constant-current and constant-voltage charging algorithms for single-cell lithium batteries
• Integrates thermal regulation to automatically reduce charging current based on die temperature
• Includes status indicator pin for monitoring charge completion and fault conditions

Applications

• Portable electronic devices requiring single-cell lithium-ion or lithium-polymer battery charging
• Consumer electronics such as mobile phones, tablets, and digital cameras
• Industrial handheld instruments and medical devices

Procurement Notes

Verify the specific suffix FCI/UN against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with system power input ranges between 3.75 V and 6 V. Confirm that the 10-MSOP footprint matches the design layout. Check for RoHS compliance details in the latest datasheet revision.

Selection Notes

Select this component when a high-current solution up to 1.2 A is required for single-cell Li-ion or Li-Po batteries. It is suitable for designs needing integrated thermal protection and simple interface control. Compare against lower current variants if power consumption is critical. Ensure the application environment stays within the specified -40 °C to +85 °C operational limits.

Part Context

This part belongs to the MCP7383x family of charge management controllers from Microchip Technology. The family includes variants like MCP73833 and MCP73838, which share similar functionality but differ in output current capabilities and package options. The MCP73834 specifically targets applications requiring higher charge currents compared to the 500 mA limit of some other family members.

Replacement Considerations

MCP73833-FCI/UN offers similar functionality with a lower maximum output current of 1.2 A (verify exact rating in datasheet) and may serve as a direct substitute if current requirements are met. MCP73838-FCI/UN is another related variant within the same package family.