MIC4451BM-TR

Overview

The MIC4451BM-TR is a low-side MOSFET gate driver manufactured by Microchip Technology, housed in an 8-pin SOIC package. It features a single inverting output capable of delivering a peak current of 12 A. The device operates within a supply voltage range of 4.5 V to 18 V and supports logic inputs from 2.4 V to VS. Key electrical parameters include rise and fall times of 25 ns, maximum delay times of 80 ns, and a typical operating supply current of 450 µA. It functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Provides high peak output current for driving large MOSFETs with improved safe operating margin
• Accepts logic inputs ranging from 2.4V to VS without requiring external speed-up components
• Incorporates proprietary input protection circuits allowing negative swing up to 5V without damage
• Features rail-to-rail CMOS/DMOS swing capability ensuring adequate gate voltage during power sequencing

Applications

• Driving large MOSFETs in power conversion circuits
• Replacing discrete component networks to reduce PCB area and assembly cost
• Industrial motor control systems requiring robust gate drive signals

Procurement Notes

Verify the specific suffix 'BM' against the official Microchip datasheet to confirm package type and temperature grade. Ensure the 'TR' designation matches the required tape-and-reel packaging configuration for your manufacturing process. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and avoid counterfeit components.

Selection Notes

Select this component when an inverting low-side gate drive is required for high-current MOSFET applications. It is suitable for designs needing fast switching speeds with minimal crossover current. Consider the 8-pin SOIC footprint and the 4.5V to 18V supply range compatibility with your system logic levels before finalizing the design.

Part Context

The MIC4451 belongs to the MIC4451/MIC4452 family of CMOS MOSFET drivers. While the MIC4451 provides an inverting output, its non-inverting counterpart is the MIC4452. Both share similar performance characteristics, including 12A peak output current and latch-up immunity, designed to simplify product design and reduce component count in power management applications.

Replacement Considerations

The MIC4451YM is a pin-compatible alternative offering identical functional specifications. Verify that any substitute maintains the same inverting configuration and SOIC-8 package dimensions to ensure seamless integration into existing layouts.