MIC4429CT

Overview

The MIC4429CT is a single-channel, low-side MOSFET gate driver manufactured by Microchip Technology. It features an inverting logic configuration with a peak output current capability of 6A for both sourcing and sinking. The device operates within a supply voltage range of 4.5V to 18V and supports CMOS and TTL logic inputs. Typical rise and fall times are specified at 25ns. It is available in an 8-pin PDIP package designed for through-hole mounting.

Feature Summary

• Provides high peak output current of 6A for efficient MOSFET switching
• Features latch-up protection capable of withstanding reverse output currents exceeding 1.5A
• Includes ESD protection rated at 4kV and logic inputs tolerant to negative swings up to 5V

Applications

• Switch-mode power supplies
• Motor control systems
• Pulse transformer drivers
• Class D switching amplifiers

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and temperature rating. Ensure compatibility with existing PCB footprints and thermal management requirements. Confirm RoHS compliance status for the specific revision. Check for any recent Product Change Notifications regarding packaging or material updates before finalizing procurement.

Selection Notes

Select this component when a low-side inverting driver with 6A peak current is required. Compare rise/fall times against system switching frequency needs. Verify that the 4.5V minimum supply voltage aligns with the system's power rails. Consider the PDIP package constraints if surface mount alternatives like MSOP or SOIC are preferred for density.

Part Context

The MIC4429 is part of the TC4420/4429 family of high-speed MOSFET drivers fabricated in CMOS technology. This family offers lower power consumption compared to bipolar drivers while maintaining high drive strength. The MIC4429 specifically provides the inverting function, whereas the TC4420 provides non-inverting functionality, sharing pin compatibility within the series.

Replacement Considerations

The TC4429CPA is a direct pin-compatible alternative from Microchip offering similar electrical characteristics in a PDIP-8 package. Other variants such as TC4429VOA (SOIC) or TC4429VMF (DFN) provide equivalent performance in different packages.