Microchip MCP73812 Li-Ion/Li-Pol Battery Charger SOT-23

The Microchip MCP73812 Li-Ion/Li-Pol Battery Charger SOT-23 is a single-cell charge controller for Li-Ion and Li-Polymer batteries, offering a programmable charge current of up to 500mA in a compact 5-pin SOT-23 package.

Overview

The MCP73812 is a miniature, fully integrated charge management controller designed for single-cell Li-Ion and Li-Polymer batteries. As a linear charger, it provides a complete charging solution with minimal external components, making it suitable for space-limited applications.

Key Features

• Constant current / constant voltage (CC/CV) charge algorithm, delivering optimal capacity in the shortest possible charging time
• Programmable charge current from 50mA to 500mA, set via a single external resistor
• Battery charge voltage regulation of 4.2V with ±1% accuracy
• Thermal regulation that automatically limits charge current during high-power or high-ambient conditions
• Automatic power-down when input power is removed
• Active-high charge enable input and external end-of-charge control
• Minimum external components: two ceramic capacitors and one resistor

Specifications

The device has a 6V input voltage, supports 1-cell configurations, and operates across a temperature range of -40°C to +85°C. It is supplied in a surface mount SOT-23 package with 5 pins and has a weight of 0.635 grams. Dimensions are 43 mm (H) x 33 mm (W) x 15 mm (D).

Applications

Designed for single-cell Li-Ion and Li-Polymer battery charging in space-limited designs, with a wide operating temperature range suited to a variety of environments.