MIC79050-4.2BMM-TR

Overview

The MIC79050-4.2BMM-TR is a linear single-cell lithium-ion battery charger IC manufactured by Microchip Technology. It features an integrated on-chip pass transistor for high-precision charging with ultra-high accuracy of ±0.75% over the Li-Ion battery charging temperature range. The device supports a maximum input voltage of 16V and operates within a junction temperature range of -40°C to +125°C. It provides fault protection against overcurrent, overtemperature, reverse battery, and reverse current conditions. The component is housed in an 8-pin MSOP package.

Feature Summary

• Integrates an on-chip pass transistor to enable high-precision charging without external components.
• Delivers ultra-high charging accuracy across the full lithium-ion battery temperature range.
• Achieves zero off-mode current state to minimize power consumption when not actively charging.
• Includes comprehensive fault protection mechanisms for safe operation under abnormal conditions.

Applications

• Simple single-cell lithium-ion battery chargers
• Cost-effective portable electronic device power management
• Battery-powered consumer electronics requiring precise charge control

Procurement Notes

Verify component status as this specific part number may be discontinued or subject to supply constraints. Confirm that the selected replacement, such as MIC79050-4.2YMM-TR, matches the required package type and electrical specifications. Ensure compatibility with existing design parameters before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring a simple, cost-effective solution for single-cell lithium-ion batteries. Consider the integrated pass transistor and high precision for designs minimizing external component count. Evaluate the operating temperature range and fault protection features for robustness in varying environmental conditions.

Part Context

This part belongs to the MIC79050 series of linear battery chargers from Microchip Technology. The series is designed for single-cell lithium-ion and lithium-polymer batteries. Variants differ primarily in packaging options such as SOIC-N, SOT-223, and MSOP, while maintaining core charging functionality and precision characteristics.

Replacement Considerations

MIC79050-4.2YMM-TR is a confirmed direct substitute available from Microchip Technology. Verify pinout compatibility and package dimensions when transitioning from the discontinued MIC79050-4.2BMM-TR to ensure seamless integration into existing PCB layouts.

FAQ

What is the charging accuracy of the MIC79050?

The MIC79050 offers ultra-high precision with an accuracy of ±0.75% over the lithium-ion battery charging temperature range.

Does the MIC79050 include an external pass transistor?

No, the MIC79050 includes an on-chip pass transistor, which simplifies the design by eliminating the need for external power transistors.