Microchip | MIC4422AYM

MIC4422AYM and MIC4421A 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 9 A (peak) output and can drive the largest MOSFETs with an improved safe operating margin.

The MIC4421A/4422A 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 5 V 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 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:

• High peak-output current: 9 A  Peak (typ.).
• Wide operating range: 4.5 V to 18 V (typ.).
• 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 5 V.
• High capacitive load drive: 47,000 pF.
• Low delay time: 15 ns (typ.).
• Logic high input for any voltage from 2.4 V to VS.
• Low equivalent input capacitance (typ.): 7 pF.
• Low supply current: 500 µA (typ.).
• 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.