MICROCHIP MIC4421AZM

The 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/22A 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 ensures adequate gate voltage to the MOSFET during power up/down sequencing. Because 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.

• High Output Current: 9A Peak (Typical)
• Wide Operating Range: 4.5V to 18V (Typical)
• Minimum Pulse Width: 50 ns
• Latch-Up Proof: Fully Isolated Process is Inherently Immune to Any Latch-Up
• Input Will Withstand Negative Swing of Up to 5V
• High Capacitive Load Drive: 47,000 pF
• Low Delay Time: 15 ns (Typical)
• Logic High Input for Any Voltage from 2.4V to VS
• Low Equivalent Input Capacitance: 7 pF (typical)
• Low Supply Current: 500 μA (Typical)
• Output Voltage Swing to Within 25 mV of GND or VS

• Switch Mode Power Supplies
• Motor Controls
• Pulse Transformer Driver
• Class-D Switching Amplifiers
• Line Drivers
• Driving MOSFET or IGBT Parallel Chip Modules
• Local Power On/Off Switch
• Pulse Generators