Catalog
9 A MOSFET Gate Driver
Key Features
- 9 A peak (typical)
- Wide operating range: 4.5 V to 18 V (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 5 V
- High capacitive load drive: 47,000 pF
- Low delay time: 15 ns (typical)
- Logic high input for any voltage from 2.4 V to VS
- Low equivalent input capacitance (typical): 7 pF
- Low supply current: 500 µA (typical)
- Output voltage swing to within 25 mV of ground or VS
Description
AI
MIC4421A and MIC4422A MOSFET gate 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 2.4V 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 gate 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.
