TC4426

TC4427

TC4428

TC4426/7/8-8

10/21/96

© 2001 Microchip Technology Inc.

DS21422A

1.5A DUAL HIGH-SPEED POWER MOSFET DRIVERS

OUTPUT

INPUT

GND

EFFECTIVE INPUT

C = 12 pF

300 mV

INVERTING

OUTPUTS

NONINVERTING

OUTPUTS

TC4426/TC4427/TC4428

4.7V

NOTES: 1.TC4426 has 2 inverting drivers; TC4427 has 2 noninverting drivers.

2. TC4428 has one inverting and one noninverting driver.

3. Ground any unused driver input.

FEATURES

s

High Peak Output Current ............................... 1.5A

s

Wide Operating Range .......................... 4.5V to 18V

s

High Capacitive Load

Drive Capability .......................... 1000pF in 25nsec

s

Short Delay Time .............................. < 40nsec Typ.

s

Consistent Delay Times With Changes in

Supply Voltage

s

Low Supply Current

— With Logic “1” Input .................................... 4mA

— With Logic “0” Input ................................. 400

s

Low Output Impedance ....................................... 7

Ω

s

Latch-Up Protected ............. Will Withstand >0.5A

Reverse Current ................................. Down to – 5V

s

Input Will Withstand Negative Inputs

s

ESD Protected ..................................................... 4kV

s

Pinout Same as TC426/TC427/TC428

GENERAL DESCRIPTION

The TC4426/4427/4428 are improved versions of the

earlier TC426/427/428 family of buffer/drivers (with which

they are pin compatible). They will not latch up under any

conditions within their power and voltage ratings. They are

not subject to damage when up to 5V of noise spiking (of

either polarity) occurs on the ground pin. They can accept,

without damage or logic upset, up to 500 mA of reverse

current (of either polarity) being forced back into their

outputs. All terminals are fully protected against up to 4kV of

electrostatic discharge.

As MOSFET drivers, the TC4426/4427/4428 can easily

switch 1000pF gate capacitances in under 30nsec, and

provide low enough impedances in both the ON and OFF

states to ensure the MOSFET's intended state will not be

affected, even by large transients.

Other compatible drivers are the TC4426A/27A/28A.

These drivers have matched input to output leading edge

and falling edge delays, tD1 and tD2, for processing short

duration pulses in the 25 nsec range. They are pin compat-

ible with the TC4426/27/28.

FUNCTIONAL BLOCK DIAGRAM

ORDERING INFORMATION

Temperature

Part No.

Package

Range

TC4426COA

8-Pin SOIC

0

°C to +70°C

TC4426CPA

8-Pin Plastic DIP

0

°C to +70°C

TC4426EOA

8-Pin SOIC

– 40

°C to +85°C

TC4426EPA

8-Pin Plastic DIP

– 40

°C to +85°C

TC4426MJA

8-Pin CerDIP

– 55

°C to +125°C

TC4427COA

8-Pin SOIC

0

°C to +70°C

TC4427CPA

8-Pin Plastic DIP

0

°C to +70°C

TC4427EOA

8-Pin SOIC

– 40

°C to +85°C

TC4427EPA

8-Pin Plastic DIP

– 40

°C to +85°C

TC4427MJA

8-Pin CerDIP

– 55

°C to +125°C

TC4428COA

8-Pin SOIC

0

°C to +70°C

TC4428CPA

8-Pin Plastic DIP

0

°C to +70°C

TC4428EOA

8-Pin SOIC

– 40

°C to +85°C

TC4428EPA

8-Pin Plastic DIP

– 40

°C to +85°C

TC4428MJA

8-Pin CerDIP

– 55

°C to +125°C