MIC79050-4.2YMM TR

Overview

The MIC79050-4.2YMM TR is a linear battery charger IC designed for single-cell Lithium-Ion and Lithium-Polymer batteries, manufactured by Microchip Technology. It features an on-chip pass transistor to deliver high-precision charging with an accuracy of ±0.75% over the Li-Ion battery charging temperature range. The device operates with a zero off-mode current state, providing a simple and cost-effective solution. It supports a maximum supply voltage of 16V and functions within a junction temperature range of -40°C to 125°C. Packaged in an 8-pin MSOP, it includes fault protection against overcurrent, overtemperature, reverse battery, and reverse current conditions.

Feature Summary

• Integrates an on-chip pass transistor for precise charge control
• Achieves ultra-high charging accuracy across the operating temperature range
• Provides zero off-mode current state for efficient power management
• Includes comprehensive fault protection mechanisms

Applications

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

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when ordering. Confirm the '4.2' designation aligns with the required 4.2V output voltage for standard Lithium-Ion cells. Ensure the MSOP package type matches the PCB footprint requirements. Check component status as availability may vary between distributors. Validate that the selected variant meets all environmental and safety standards for the intended application.

Selection Notes

Select this component for applications requiring a minimal external component count and high precision. The integrated pass transistor eliminates the need for external switching elements. Consider the thermal performance within the specified junction temperature range. The zero off-mode current feature is advantageous for battery-powered systems seeking to minimize standby drain. Ensure the input voltage does not exceed the 16V maximum rating.

Part Context

This part belongs to the MIC79050 family of linear battery chargers from Microchip Technology. It is specifically configured for 4.2V output suitable for single-cell chemistry. The 'YMM' suffix denotes the 8-pin MSOP tube package, while 'TR' indicates the tape-and-reel version. This series provides a straightforward alternative to complex switching charger topologies for low-power applications.

Replacement Considerations

• MIC79050-4.2YMM-TR

FAQ

What is the charging accuracy of the MIC79050?

The device offers ultra-high precision with an accuracy of ±0.75% over the Lithium-Ion battery charging temperature range.

Does the MIC79050 require an external pass transistor?

No, it includes an on-chip pass transistor for high-precision charging, simplifying the design.