|
MIC4420_05 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – 6A-Peak Low-Side MOSFET Driver | |||
|
MIC4420/4429
Micrel, Inc.
MIC4420/4429
6A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4420, MIC4429 and MIC429 MOSFET drivers are
tough, efï¬cient, and easy to use. The MIC4429 and MIC429
are inverting drivers, while the MIC4420 is a non-inverting
driver.
They are capable of 6A (peak) output and can drive the larg-
est 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 ad-
equate gate voltage to the MOSFET during power up/down
sequencing.
Note: See MIC4120/4129 for high power and narrow
pulse applications.
Features
⢠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 ...............450µA With Logic 1 Input
⢠Low Output Impedance ......................................... 2.5Ω
⢠Output Voltage Swing Within 25mV of Ground or VS
Applications
⢠Switch Mode Power Supplies
⢠Motor Controls
⢠Pulse Transformer Driver
⢠Class-D Switching Ampliï¬ers
Functional Diagram
0.1mA
IN
2kâ¦
VS
0.4mA
MIC4429
INVERTING
MIC4420
NONINVERTING
GND
OUT
Micrel, Inc. ⢠2180 Fortune Drive ⢠San Jose, CA 95131 ⢠USA ⢠tel + 1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
July 2005
1
M9999-072205
|
▷ |