MIC79050-4.2YS-TR

Overview

The MIC79050-4.2YS-TR is a single-cell Lithium-Ion battery charger manufactured by Microchip Technology, housed in an 8-Pin SOIC N package with tape and reel (TR) configuration. It integrates an on-chip pass transistor to deliver high-precision charging capabilities. The device features ultra-high accuracy of ±0.75% over the Li-Ion battery charging temperature range and maintains a zero off-mode current state. Designed for cost-effective applications, it supports standard linear charging profiles for single-cell lithium-ion and lithium-polymer batteries.

Feature Summary

• Integrates an on-chip pass transistor for simplified circuit design and high-precision charging control
• Delivers ultra-high accuracy within ±0.75% across the specified lithium-ion battery charging temperature range
• Achieves 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 that the specific suffix 'YS-TR' corresponds to the 8-Pin SOIC N tube-to-reel configuration as listed in official Microchip documentation. Confirm that the part number aligns with the 4.2V fixed output variant intended for single-cell chemistry. Ensure compatibility with surface-mount assembly processes requiring tape and reel handling. Cross-reference the manufacturer's latest datasheet to validate pinout assignments and thermal requirements before finalizing procurement orders.

Selection Notes

Select this component when designing simple, low-component-count chargers for single-cell lithium-based batteries. The integrated pass transistor eliminates the need for external high-current switching elements, reducing bill of materials complexity. The ±0.75% precision ensures safe and efficient charging cycles without requiring complex external feedback loops. Ideal for applications where space constraints and cost efficiency are primary design drivers alongside reliable battery protection.

Part Context

The MIC79050 belongs to Microchip's dedicated battery management family, specifically targeting linear charging solutions. Unlike switch-mode chargers, this series prioritizes simplicity and minimal external component count. The 4.2YS-TR variant represents the surface-mount optimized version of the MIC79050 line, providing a robust alternative to through-hole packages while maintaining identical electrical performance characteristics for standard lithium-ion cell management.

Replacement Considerations

MIC79050-4.2YM

FAQ

Does the MIC79050 require external components for basic charging operation?

No, the MIC79050 includes an on-chip pass transistor, allowing it to function as a complete charging solution with minimal external components compared to discrete designs.

What is the charging accuracy specification of the MIC79050?

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