MP26123DR-LF-Z

Overview

The MP26123DR-LF-Z is a monolithic DC-DC buck switching charger IC designed for 2-cell or 3-cell lithium-ion battery packs. It integrates an upper power MOSFET to deliver up to 2A of charging current with a wide input voltage range of 9V to 24V. The device utilizes peak current mode control for rapid loop response and precise regulation. Key electrical parameters include a maximum output current of 2A, a fixed switching frequency of 600kHz, and a VBATT accuracy of ±0.75%. It operates within a temperature range up to +125°C and is housed in a compact 4mm x 4mm QFN-16 package.

Feature Summary

• Integrates an upper power MOSFET for efficient step-down charging
• Employs peak current mode control for fast transient response
• Includes comprehensive safety features such as over-temperature shutdown and cycle-by-cycle current limiting
• Supports battery temperature monitoring and programmable timeout protection

Applications

• Charging 2-cell lithium-ion battery packs
• Charging 3-cell lithium-ion battery packs
• Portable electronic devices requiring high-efficiency power management
• Industrial equipment utilizing multi-cell battery systems

Procurement Notes

Verify the specific suffix (LF-Z) against official Monolithic Power Systems documentation to confirm lead-free status and tape-and-reel packaging specifications. Ensure compatibility with the required QFN-16 footprint and thermal pad requirements during PCB layout. Cross-reference the datasheet revision date to validate all electrical characteristics and pin configurations before finalizing procurement orders.

Selection Notes

Select this component when designing systems that require charging 2 or 3 series lithium-ion cells from a 9V to 24V input source. It is suitable for applications demanding high efficiency and integrated power switches to minimize external component count. Consider the QFN-16 package constraints and thermal dissipation capabilities relative to the expected 2A load and ambient operating conditions.

Part Context

This part belongs to the MP26123 series of battery charge management ICs from Monolithic Power Systems. It is specifically engineered for multi-cell lithium-ion applications, distinguishing itself from single-cell linear chargers like the MP26121 or LiFePO4-specific variants like the MP2623. The DR-LF-Z designation indicates a standard surface-mount reel configuration.

Replacement Considerations

Direct substitutes are not explicitly confirmed in public documentation. Evaluate alternatives within the MPS portfolio based on cell count and input voltage compatibility. Verify pin-to-pin compatibility and thermal performance if considering cross-series replacements.