MCP73863-I/SL Equivalent & Substitute Parts

Part Overview

The MCP73863-I/SL is a single-cell lithium ion/polymer battery charger IC manufactured by Microchip Technology in a 16-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent parts for new designs and production continuity. The MCP73863-I/SL provides constant programmable charging current with integrated timer functionality and operates across a -40°C to 85°C temperature range, making it suitable for portable battery management applications.

Substiute Parts

MCP73863-I/SL

Microchip TechnologyIn Stock: 1166MCP73863-I/SL Datasheet

Current PartRFQ

MCP73833-FCI/UN

Microchip TechnologyIn Stock: 6001MCP73833-FCI/UN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MCP73863-I/SL is determined by the following critical parameters:

• Battery Chemistry & Cell Count: Both the main part and substitute must support single-cell lithium ion/polymer charging at 4.2V nominal voltage
• Charging Current Capability: The substitute must support programmable constant current charging with a maximum rating compatible with or exceeding typical application requirements
• Supply Voltage Range: The substitute must accept the same input voltage range as the original design
• Operating Temperature Range: The substitute must maintain the -40°C to 85°C operating window
• Package Compatibility: Physical package dimensions and pin count determine PCB layout feasibility
• Regulatory Compliance: RoHS3 and REACH compliance status must be maintained

The MCP73833-FCI/UN qualifies as a direct substitute based on these parameters, despite differences in package form factor and maximum supply voltage specification.

Parameter Comparison

Engineering Selection Recommendations

The MCP73833-FCI/UN is the manufacturer-recommended substitute for the obsolete MCP73863-I/SL. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The MCP73833-FCI/UN is currently in active production status, providing supply chain stability for new designs and ongoing production requirements.

Key considerations for selection:

• The MCP73833-FCI/UN operates with a maximum supply voltage of 6V compared to the MCP73863-I/SL's 12V specification. Design input voltage must not exceed 6V for the substitute.
• The MCP73833-FCI/UN supports a maximum charge current of 1.1A versus 1.38A for the original part. Applications requiring charge currents above 1.1A require design modification or alternative component selection.
• Package transition from 16-SOIC to 10-MSOP requires PCB layout redesign and schematic modification.
• Both parts maintain identical operating temperature range and battery voltage specifications, ensuring thermal and charging profile compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MCP73833-FCI/UN directly replace the MCP73863-I/SL without PCB modification?

A: No. The MCP73833-FCI/UN uses a 10-MSOP package versus the 16-SOIC package of the MCP73863-I/SL. PCB layout redesign is required. Additionally, the pin configuration differs between packages, necessitating schematic and layout changes.

Q: What is the impact of the reduced maximum supply voltage (6V vs. 12V) on system design?

A: The MCP73833-FCI/UN requires input voltage not to exceed 6V. If your original design uses supply voltages above 6V, the substitute cannot be used without additional voltage regulation circuitry upstream of the charger IC.

Q: Are both parts suitable for the same battery chemistry and cell count?

A: Yes. Both the MCP73863-I/SL and MCP73833-FCI/UN are designed for single-cell lithium ion/polymer battery charging at 4.2V nominal voltage.

Q: What is the significance of the charge current difference (1.38A vs. 1.1A)?

A: The MCP73863-I/SL supports a maximum programmable charge current of 1.38A, while the MCP73833-FCI/UN supports 1.1A maximum. Applications requiring charge currents above 1.1A cannot use the substitute without modifying the charging profile or selecting an alternative component.

Q: Do both parts maintain the same operating temperature range?

A: Yes. Both components operate across -40°C to 85°C (TA), ensuring thermal compatibility for equivalent application environments.

Q: What regulatory compliance status applies to the MCP73833-FCI/UN?

A: The MCP73833-FCI/UN maintains ROHS3 compliance and REACH unaffected status, identical to the MCP73863-I/SL, ensuring regulatory continuity in design transitions.