Microchip | MIC4421ZN

MIC4421ZN and MIC4422 MOSFET drivers are rugged, efficient, and easy to use. The MIC4421 is an inverting driver, while the MIC4422 is a non-inverting driver. Both versions are capable of 9 A (peak) output and can drive the largest MOSFETs with an improved safe operating margin. The MIC4421/4422 accepts any logic input from 2.4 V 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.

MIC4421/4422 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 insures 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.

Key Features:

• BiCMOS/DMOS Construction
• Latch-Up Proof: Fully Isolated Process is Inherently Immune to Any Latch-up.
• Input Will Withstand Negative Swing of Up to 5 V.
• Matched Rise and Fall Times 25 ns.
• High Peak Output Current 9 A Peak
• Wide Operating Range 4.5 V to 18 V.
• High Capacitive Load Drive 47,000 pF.
• Low Delay Time 30 ns Typ.
• Logic High Input for Any Voltage from 2.4 V to VS.
• Low Equivalent Input Capacitance (typ) 7 pF.
• Low Supply Current 450 µA With Logic 1 Input.
• Low Output Impedance 1.5 Ω.
• Output Voltage Swing to Within 25 mV of GND or VS.

Applications:

• 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.