General Description

The MIC4467/8/9 family of four output CMOS

buffer/drivers is an expansion from the earlier singleand

dual-output drivers, to which they are functionally

closely related. Because package pin count permitted

it, each driver has been equipped with a dual 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 high

efficiency, low-impedance driver capable of high peak

currents, rail-to-rail voltage swings, 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

on loading is that total power dissipation in the IC must

be kept within the power dissipation limits of the

package.

The MIC446x series drivers are built using a BCD

process. They will not latch under any conditions within

their power and voltage ratings. They are not subject to

damage when up to 5V of noise spiking (either polarity)

occurs on the ground line. They can accept up to half

an amp of inductive kickback current (either polarity)

into their outputs without damage or logic upset.

Features

• Reliable, Low-Power Bipolar/CMOS/DMOS

Construction

• Latch-Up Protected to >500 mA Reverse Current

• Logic Input withstands Swing to –5V

• High 3A Peak Output Current

• Wide 4.5V to 18V Operating Range

• Symmetrical Rise and Fall Times

• Short <40 ns Typical Delay Time

• TTL Logic Input Independent of Supply Voltage

• Low Equivalent 6 pF Input Capacitance

• Low 5Ω Typical Output Impedance

• Output Voltage Swings within 25 mV of Ground or VS.

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