July 2005

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MIC4467/4468/4469

MIC4467/4468/4469

Micrel, Inc.

General Description

TheMIC4467/8/9familyof4-outputCMOSbuffer/driversisan

expansion from the earlier single- and dual-output drivers, to

which they are functionally closely related. Because package

pin count permitted it, each driver has been equipped with a

2-input logic gate for added flexibility. Placing four high-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, coaxial cables, and piezoelectric transducers can all be

driven easily with MIC446X series drivers. The only limitation

MIC4467/4468/4469

Quad 1.2A-Peak Low-Side MOSFET Driver

Bipolar/CMOS/DMOS

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 V

S

• ESD Protected

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

1A

1B

2A

2B

3A

3B

4A

4B

1Y

2Y

3Y

4Y

GND

1

2

3

4

5

6

8

9

13

12

11

10

14

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MIC4468

1A

1B

2A

2B

3A

3B

4A

4B

1Y

2Y

3Y

4Y

GND

1

2

3

4

5

6

8

9

13

12

11

10

14

7

MIC4467

1A

1B

2A

2B

3A

3B

4A

4B

1Y

2Y

3Y

4Y

GND

1

2

3

4

5

6

8

9

13

12

11

10

14

7

MIC4469

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com