MCHPMCP73831T-2ATI/OT

Overview

The MCP73831T-2ATI/OT is a highly integrated, single-cell Li-Ion/Li-Polymer linear charge management controller. It fits into space-constrained designs using a small SOT-23-5 package and requires only a few external components for operation. This specific variant provides a 4.35V regulation voltage and is designed for applications requiring high precision charging from a USB port or wall adapter.

Why Choose This Part

The device features an integrated pass transistor and current sense, eliminating the need for an external MOSFET or sense resistor. It provides high-accuracy voltage regulation and includes automatic power-down and thermal regulation to maximize battery life and safety. The charge current is easily programmable with a single resistor, allowing for quick design adjustments.

Applications

Getting Started

To evaluate the device, look for MCP73831 evaluation boards or design a simple PCB following the datasheet's typical application circuit. Connect a single resistor from the PROG pin to ground to set the desired charge current, and ensure a minimum of 4.7uF ceramic bypass capacitors are used on the input and output pins. Microchip's application notes provide detailed guidance on thermal management for the SOT-23 package.

MCP7383 Family

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