MCP73833-BZI/UN

Overview

The MCP73833-BZI/UN is a stand-alone linear Li-Ion/Li-Polymer charge management controller manufactured by Microchip Technology. It supports single-cell battery charging with a maximum output current of 1.2 A and a fixed regulation voltage of 4.2 V. The device operates from an input supply voltage range of 3.75 V to 6 V. It is housed in a 10-pin MSOP package (MSOP-10) suitable for surface mount installation. The component functions within a temperature range of -40°C to +85°C.

Feature Summary

• Implements standard Li-Ion and Li-Polymer charging profiles including constant current and constant voltage phases
• Integrates thermal regulation to reduce charging current when die temperature reaches a predefined limit
• Provides status indication through dedicated open-drain flags for charge completion and thermal warning

Applications

• Single-cell lithium-ion or lithium-polymer battery charging in portable consumer electronics
• Power management in handheld devices requiring compact surface-mount solutions
• Battery backup systems for embedded applications

Procurement Notes

Verify the specific suffix BZI against official Microchip documentation to confirm pinout and electrical characteristics match your design requirements. Ensure the MSOP-10 package dimensions align with your PCB footprint. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this component for designs requiring a simple, low-component-count solution for single-cell Li-Ion/Polymer batteries. It is suitable where input voltages remain within the 3.75 V to 6 V range. Consider the 1.2 A current capability and thermal performance relative to your system's power dissipation constraints. Verify that the 10-MSOP package fits within your available board space.

Part Context

This part belongs to the MCP7383x family of charge management controllers from Microchip Technology. The family includes variants such as MCP73833 and MCP73834, which offer similar functionality but may differ in features like programmable current or additional monitoring outputs. The MCP73833 series is designed for cost-sensitive applications needing reliable single-cell charging without complex external circuitry.

Replacement Considerations

Direct substitutes include other MCP73833 variants with different suffixes (e.g., AMI/UN, FCI/UN) which share the same core functionality but may differ in packaging or temperature grade. Verify compatibility before substitution.