MIC4451ABM

Overview

The MIC4451ABM is a low-side MOSFET gate driver manufactured by Microchip Technology. It features a single inverting output capable of delivering a peak current of 12A. The device operates within a supply voltage range of 4.5V to 18V and supports logic inputs from 2.4V up to the supply voltage. Key electrical parameters include rise and fall times of 25ns, propagation delays of 80ns maximum, and a quiescent supply current of 450µA. It is housed in an 8-pin SOIC package with a 3.90mm body width.

Feature Summary

• High peak output current capability for driving large MOSFETs
• Input tolerance for negative voltage swings without damage
• Latch-up immunity through fully isolated BiCMOS/DMOS process
• Rail-to-rail output swing for adequate gate drive during sequencing

Applications

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

Procurement Notes

Verify the specific suffix 'ABM' against official Microchip documentation to confirm temperature grade and packaging details. Ensure compatibility with the required operating temperature range and pinout configuration before integration. Cross-reference datasheet revisions to validate parameter consistency.

Selection Notes

Select this component for applications requiring high-speed switching with robust input protection. The inverting configuration suits circuits where signal phase inversion is acceptable. Consider the 12A peak current rating when sizing heatsinks and PCB traces for thermal management under heavy capacitive loads.

Part Context

This part belongs to the MIC4451/MIC4452 family of CMOS MOSFET drivers. While the MIC4451 provides an inverting output, the MIC4452 offers a non-inverting variant. Both share similar performance characteristics regarding speed, current drive, and input protection capabilities.

Replacement Considerations

Check for MIC4451YM or MIC4451ZT equivalents. Verify that substitute parts maintain the same 12A peak current rating, 4.5V-18V supply range, and SOIC-8 package dimensions to ensure mechanical and electrical compatibility.