MIC79050-4.2BMM

Overview

The MIC79050-4.2BMM is a linear battery charger IC designed for single-cell Lithium-Ion and Lithium-Polymer batteries, featuring an integrated on-chip pass transistor. It provides a fixed output voltage of 4.2V with a maximum supply voltage of 16V. The device operates within a junction temperature range of -40°C to 125°C and utilizes an 8-pin MSOP package. Key electrical characteristics include ultra-high charging precision of ±0.75% over the specified temperature range and zero off-mode current state.

Feature Summary

• Integrates an on-chip pass transistor to enable high-precision charging without external components
• Provides ultra-high accuracy of ±0.75% across the entire Lithium-Ion battery charging temperature range
• Features a zero off-mode current state to minimize power consumption when not actively charging

Applications

• Simple single-cell Lithium-Ion battery chargers
• Lithium-Polymer battery charging systems
• Cost-effective portable electronic device power management

Procurement Notes

Verify the specific suffix 'BMM' against official Microchip documentation to confirm the exact package type and tape/reel configuration. Confirm RoHS compliance status as some variants may differ. Ensure the design accounts for the 8-MSOP thermal requirements given the operating temperature range up to 125°C TJ.

Selection Notes

Select this component for applications requiring a minimal external component count due to the integrated pass transistor. The fixed 4.2V output suits standard single-cell Li-Ion chemistry. Consider the 8-MSOP package constraints for PCB layout and thermal dissipation relative to the expected charge current and ambient conditions.

Part Context

This part belongs to the MIC79050 family of linear battery chargers from Microchip Technology. It is specifically configured for 4.2V output targeting single-cell Lithium-Ion and Lithium-Polymer chemistries. The family emphasizes simplicity and cost-effectiveness by integrating critical power path components directly onto the silicon die.

Replacement Considerations

MIC79050-4.2YMM-TR is listed as a direct substitute.