Parts MCP7387 Battery Chargers Family MCP7387 MCP73871-4CAI/ML

MCHPMCP73871-4CAI/ML

Name: MCP73871-4CAI/ML
Brand: Microchip Technology

Microchip Technology

Battery Management USB/AC Battery Charger w/Pwr Mgmt

39 in stock

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Overview

The MCP73871-4CAI/ML is a Microchip single-cell Li-Ion/Li-Poly charge-management IC with integrated power-path management. It accepts USB or external adapter inputs and handles battery charging plus system power routing so the system can run while the battery charges. It provides charge status signaling and limits input current for USB compliance.

Why Choose This Part

Integrates charger and power-path functions to allow simultaneous system operation and battery charging without an external ideal-diode or power multiplexer, reducing board space and BOM. Built-in input-current limiting and charge-status outputs simplify meeting USB source rules and system integration. The device also reduces design effort by providing common charge control features and clear application guidance in the datasheet.

Applications

Portable handheld devices

Provides single-cell Li-Ion charging and system power path for smartphones, handheld instruments, and portable meters.

USB-powered accessories

Manages safe charging from USB ports while enforcing input current limits for compliance with USB power sources.

Battery-backed IoT nodes

Keeps sensors and gateways powered during charging and supports autonomous battery maintenance in field equipment.

Wearables and small consumer electronics

Compact charger and power-path solution for single-cell wearable devices and small gadgets with limited PCB area.

Rechargeable UPS and backup modules

Used in small backup power modules to charge the battery and seamlessly supply the load.

Getting Started

Start with the MCP73871 datasheet and application notes from Microchip for reference schematics and layout guidance. If available, use Microchip evaluation boards or a breakout board to prototype; follow the recommended layout and thermal recommendations and set the charge current per the datasheet using the specified resistor approach. No firmware is required - this is an analog/power-management IC - so focus on correct component selection and thermal handling.

Part of MCP7387 Battery Chargers family » MCP7387

MCP7387 Family

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

Part Number	Battery Pack Voltage	Stock
MCP73871-4CAI/ML (this part)	—	39
MCP73871-2CCI/ML	4.2V	4,988
MCP73871EV	—	9
MCP73871-2AAI/ML	4.2V	1,967
MCP73871T-1CCI/ML	4.1V	3,530
MCP73871-2CAI/ML	4.2V	979
MCP73871T-2CAI/ML (Microchip)	4.2V	—
MCP73871T-4CAI/ML	4.4V	3,090

Also available as: MCP73871-4CCI/ML, MCP73871

Also Consider

LTC4054-4.2 Analog Devices (Linear Technology) - Widely used single-cell linear Li-Ion charger with minimal external components for compact charging designs.