MIC4428CN

Overview

The MIC4428CN is a dual low-side MOSFET gate driver manufactured by Microchip Technology. It provides independent inverting and non-inverting outputs with a peak output current of 1.5A for both sourcing and sinking. The device operates within a supply voltage range of 4.5V to 18V and supports logic input thresholds compatible with CMOS and TTL standards, specifically VIL at 0.8V and VIH at 2.4V. Typical rise and fall times are 20ns and 29ns respectively. It is housed in an 8-SOIC package and is rated for operation from -40°C to +150°C junction temperature.

Feature Summary

• Provides high peak output current capability of 1.5A for rapid MOSFET switching
• Features latch-up protection allowing withstand of reverse current down to -5V
• Includes comprehensive ESD protection rated up to 4kV on all terminals
• Offers independent inverting and non-inverting output configurations

Applications

• Driving power MOSFETs in motor control applications
• Switching circuits in DC-DC converters
• High-speed digital isolation interfaces
• Power management systems requiring fast gate drive signals

Procurement Notes

Verify the specific suffix 'CN' against official Microchip documentation to confirm the exact temperature grade and package variant, as suffixes define critical environmental and mechanical specifications. Ensure compatibility with existing PCB footprints for the 8-SOIC package. Cross-reference the datasheet revision to confirm pinout consistency with legacy TC426/427/428 families if replacing older designs.

Selection Notes

Select this component when dual independent gate drives are required for low-side switching applications. The 1.5A peak current suits medium-power MOSFETs. Consider the wide operating temperature range (-40°C to +150°C TJ) for industrial environments. Verify that the 4.5V minimum supply voltage aligns with the system's available rail. The 8-SOIC package offers a balance of thermal performance and board space efficiency.

Part Context

The MIC4428 is part of the TC4426/4427/4428 family, which are improved versions of the earlier TC426/427/428 buffer/drivers. These devices are pin-compatible with their predecessors but offer enhanced robustness, including immunity to latch-up and protection against noise spiking on the ground pin. The family is designed for high-speed power switching applications requiring reliable gate drive performance.

Replacement Considerations

The TC4428COA, TC4428EPA, and TC4428CPA are direct functional equivalents within the same family, offering pin-compatible alternatives with different temperature grades or packaging options.