MCP73838T-FCI/MF

Overview

The MCP73838T-FCI/MF is a fully integrated linear Li-ion/Li-polymer battery charger featuring autonomous power source selection. It supports input voltages from 3.75V to 6V and provides a regulated output of 4.2V with a maximum charge current of 1000mA. The device employs a constant current/constant voltage algorithm with selectable preconditioning and termination. Key electrical parameters include ±0.5% high-accuracy preset voltage regulation, integrated reverse discharge protection, and automatic end-of-charge control. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Autonomous power source selection between USB-port and AC-adapter
• Integrated pass transistors eliminating external switching components
• Selectable USB-port charge current for low or high power modes
• Battery cell temperature monitoring for safety

Applications

• Portable electronic devices requiring single-cell lithium charging
• USB-powered systems adhering to USB specification current limits
• Applications utilizing AC-adapter power sources
• Compact portable electronics due to small physical size

Procurement Notes

Verify the specific suffix 'MF' corresponds to the DFN-10 package variant as documented in official Microchip datasheets. Confirm that the 'T' designation indicates tape and reel packaging if required by assembly processes. Ensure compatibility with the 3.75V to 6V input range and 4.2V output requirement for the target lithium cell chemistry. Cross-reference the manufacturer part number against the latest revision history to confirm component specifications.

Selection Notes

Select this component when autonomous switching between USB and AC power sources is required without external logic. It is suitable for designs needing integrated reverse discharge protection and precise voltage regulation. Consider the DFN-10 package constraints for thermal management and PCB layout. Verify that the maximum 1A charge current meets the battery specifications and that the operating temperature range aligns with the application environment.

Part Context

This component belongs to the MCP73838 family of charge management controllers designed for single-cell lithium-ion and lithium-polymer batteries. It integrates linear charging technology with power path management. The family emphasizes minimal external component count and compact footprint, making it distinct from switching chargers or multi-cell solutions within the broader portfolio.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.