The MIC4421 is an inverting 9A peak low-side MOSFET driver fabricated using BiCMOS/DMOS technology for latch-up immunity and low power consumption. It operates from a 4.5V to 18V supply voltage and accepts logic inputs from 2.4V to V_S. The device features matched rise and fall times of 25ns typ., a propagation delay of 30ns typ., and an output voltage swing within 25mV of the supply rails. It is available in 8-pin SOIC, 8-pin DIP, and 5-pin TO-220 packages. The input can withstand up to -5V negative swing, and thermal resistance is 130°C/W for the DIP package. The IC is designed for applications including switch mode power supplies, motor controls, and class-D amplifiers.
MIC4421A and MIC4422A MOSFET drivers are rugged, efficient, and easy to use. The MIC4421A is an inverting driver, while the MIC4422A is a non-inverting driver. Both versions are capable of 9A (peak) output and can drive the largest MOSFETs with an improved safe operating margin. The MIC4421A/4422A accepts any logic input from 2.4V to VS without external speed-up capacitors or resistor networks. Proprietary circuits allow the input to swing negative by as much as 5V without damaging the part. Additional circuits protect against damage from electrostatic discharge. MIC4421A/4422A drivers can replace three or more discrete components, reducing PCB area requirements, simplifying product design, and reducing assembly cost. Modern Bipolar/CMOS/DMOS construction guarantees freedom from latch-up. The rail-to-rail swing capability of CMOS/DMOS helps ensure adequate gate voltage to the MOSFET during power up/down sequencing. Since these devices are fabricated on a self-aligned process, they have very low crossover current, run cool, use little power, and are easy to drive.
Additional Features
| Microchip Technology, Inc. | |
|---|---|
| Product Category | Metal-Oxide Semiconductor FET (MOSFET) |
| Product Number | MIC4421 |
| Product Name | 9A Inverting Peak Low Side MOSFET Driver |
