MIC4420/4429 Micrel, Inc. MIC4420/4429
6A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process General Description Features MIC4420, MIC4429 and MIC429 MOSFET drivers are
tough, efficient, and easy to use. The MIC4429 and MIC429
are inverting drivers, while the MIC4420 is a non-inverting
driver. CMOS Construction Latch-Up Protected: Will Withstand >500mA
Reverse Output Current Logic Input Withstands Negative Swing of Up to 5V Matched Rise and Fall Times . 25ns High Peak Output Current . 6A Peak Wide Operating Range . 4.5V to 18V High Capacitive Load Drive .10,000pF Low Delay Time . 55ns Typ Logic High Input for Any Voltage From 2.4V to VS Low Equivalent Input Capacitance (typ) .6pF Low Supply Current .450ВµA With Logic 1 Input Low Output Impedance . 2.5О© Output Voltage Swing Within 25mV of Ground or VS They are capable of 6A (peak) output and can drive the largest MOSFETs with an improved safe operating margin. The
MIC4420/4429/429 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.
MIC4420/4429/429 drivers can replace three or more
discrete components, reducing PCB area requirements,
simplifying product design, and reducing assembly cost.
Modern BiCMOS/DMOS construction guarantees freedom
from latch-up. The rail-to-rail swing capability insures adequate gate voltage to the MOSFET during power up/down
sequencing. Applications Switch Mode Power Supplies
Motor Controls
Pulse Transformer Driver
Class-D Switching Amplifiers Note: See MIC4120/4129 for high power and narrow
pulse applications. Functional Diagram
VS 0.1mA MIC4429 …
