Parts MCP73871T-2CAI/ML

MCHPMCP73871T-2CAI/ML

Name: MCP73871T-2CAI/ML
Brand: Microchip

Microchip

Higher-feature Microchip charger IC with integrated power-path management for more advanced battery systems.

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Overview

The MCP73871T-2CAI/ML is a highly integrated Li-Ion/Li-Polymer battery charge management controller featuring autonomous power-path management. It allows an application to be powered by an external source while simultaneously charging a single-cell battery, ensuring a seamless transition to battery power when the external supply is removed.

Why Choose This Part

The integrated system load sharing capability allows the system to be powered even with a deeply discharged or missing battery. With a maximum charge current of 1.1A and programmable safety timers, it offers a robust solution for managing thermal and safety constraints in compact designs.

Applications

Portable Consumer Electronics

Ideal for handheld devices where the system must remain operational while the battery is charging via USB or AC adapter.

USB-Powered Devices

Utilizes the integrated USB interface capability to manage power between a 5V USB source, the internal battery, and the system load.

IoT Sensor Nodes

Provides a compact solution for managing energy in wireless sensors that require reliable power-path switching and precise 4.2V charge regulation.

Key Specifications

Interface USB

Mounting Type Surface Mount

Package / Case 20-VFQFN Exposed Pad

Number of Cells 1

Fault Protection Over Temperature

Battery Chemistry Lithium Ion/Polymer

Current - Charging Constant - Programmable

Battery Pack Voltage 4.2V

Charge Current - Max 1.1A

Operating Temperature -40degC ~ 85degC (TA)

Programmable Features Timer

Voltage - Supply (Max) 6V

Supplier Device Package 20-QFN (4x4)

Getting Started

For rapid prototyping, engineers can use the MCP73871 Evaluation Board to test the power-path logic and charge cycles. Ensure that the PROG pin is tied to a resistor that sets the desired constant current level, and verify that the thermal pad is soldered to a large copper area to manage heat during 1.1A charging.

MCP7387 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number	Battery Pack Voltage	Stock
MCP73871T-2CAI/ML (this part)	4.2V	—
MCP73871-2CCI/ML (Microchip Technology)	4.2V	4,988
MCP73871T-1CCI/ML (Microchip Technology)	4.1V	3,530
MCP73871EV (Microchip Technology)	—	9
MCP73871T-4CAI/ML (Microchip Technology)	4.4V	3,090