MCP73833T-BZI/UN

Overview

The MCP73833T-BZI/UN is a standalone linear charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It operates within an input voltage range of 3.75 V to 6 V and supports a maximum output current of 1.2 A. The device regulates the charging voltage to 4.2 V, with optional settings for 4.35 V, 4.4 V, or 4.5 V depending on the specific variant configuration. It functions reliably across an operating temperature range of -40°C to +85°C. The component is housed in a compact 10-pin MSOP package with exposed pad, suitable for surface-mount assembly.

Feature Summary

• Integrated thermal regulation that dynamically reduces charging current when die temperature approaches safe limits
• Automatic termination of the constant-current charging phase upon reaching the preset voltage threshold
• Status indicator output pin providing visual feedback on charging completion and fault conditions

Applications

• Portable electronic devices requiring single-cell battery protection
• Consumer electronics utilizing lithium-ion or lithium-polymer power sources
• Industrial control modules with limited space for power management components

Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure the ordering code matches the required tape-and-reel quantity specifications. Cross-reference the part number with the latest Microchip Technology documentation to validate RoHS compliance status and availability constraints before finalizing procurement orders.

Selection Notes

Select this component for applications requiring a simple, cost-effective solution for single-cell Li-Ion or Li-Po charging. The MSOP-10 package offers a balance between thermal performance and board space efficiency. Consider the 1.2 A output capability when sizing external components and ensuring adequate heat dissipation for high-current charging scenarios in enclosed environments.

Part Context

This part belongs to the MCP73833 family of charge management controllers from Microchip Technology. The family includes variants with different packaging options such as DFN and tube-packaged versions. The 'T' designation typically indicates tape-and-reel packaging, while '/UN' specifies the specific package style and temperature range. These controllers are widely used in portable electronics due to their minimal external component count.

Replacement Considerations

Direct substitutes include other MCP73833 variants with compatible electrical characteristics but different packaging, such as MCP73833-BZI/MF for tube packaging. Verify pin compatibility and thermal requirements when substituting between MSOP and DFN packages to ensure proper board layout adaptation.