MIC4467/4468/4469
Micrel, Inc.
MIC4467/4468/4469
Quad 1.2A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS
General Description
Features
•
•
•
•
•
•
•
•
•
•
Built using reliable, low power CMOS processes
Latchproof. Withstands 500mA Inductive Kickback
3 Input Logic Choices
Symmetrical Rise and Fall Times............................25ns
Short, Equal Delay Times .......................................75ns
High Peak Output Current....................................... 1.2A
Wide Operating Range ..................................4.5 to 18V
Low Equivalent Input Capacitance (typ) .................. 6pF
Inputs = Logic 1 for Any Input From 2.4V to VS
ESD Protected
TheMIC4467/8/9familyof4-outputCMOSbuffer/driversisan
expansion from the earlier single- and dual-output drivers, to
whichtheyarefunctionallycloselyrelated. Becausepackage
pin count permitted it, each driver has been equipped with a
2-inputlogicgateforaddedflexibility.Placingfourhigh-power
drivers in a single package also improves system reliability
and reduces total system cost. In some applications, one of
these drivers can replace not only two packages of single-
input drivers, but some of the associated logic as well.
Although primarily intended for driving power MOSFETs,
and similar highly capacitive loads, these drivers are equally
well suited to driving any other load (capacitive, resistive, or
inductive), which requires a high-efficiency, low-impedance
drivercapableofhighpeakcurrents,rail-to-railvoltageswings,
and fast switching times. For example, heavily loaded clock
lines, coaxialcables, andpiezoelectrictransducerscanallbe
driven easily with MIC446X series drivers. The only limitation
Applications
•
•
•
•
•
•
•
General-Purpose CMOS Logic Buffer
Driving All 4 MOSFETs in an H-Bridge
Direct Small-Motor Driver
Relay or Peripheral Drivers
Dual Differential Output Power Drivers
CCD Driver
Pin-Switching Network Driver
Logic Diagrams
MIC4467
MIC4469
MIC4468
V
V
V
S
S
S
14
14
14
1
2
1
2
1
2
1A
1B
1A
13
1A
1B
13
12
11
10
13
12
11
10
1Y
2Y
3Y
4Y
1Y
2Y
3Y
4Y
1Y
2Y
3Y
4Y
1B
3
4
3
4
3
4
2A
2B
2A
2B
2A
2B
12
11
10
5
6
5
6
5
6
3A
3B
3A
3B
3A
3B
8
9
8
9
8
9
4A
4B
4A
4B
4A
4B
7
7
7
GND
GND
GND
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
MIC4467/4468/4469