Datasheet

© 2007 Microchip Technology Inc. DS21424D-page 1
TC4431/TC4432
Features
• High Peak Output Current – 1.5 A
• Wide Input Supply Operating Range:
- 4.5V to 30V
• High Capacitive Load Drive Capability:
- 1000 pF in 25 nsec
• Short Delay Times – <78 nsec Typ.
• Low Supply Current:
- With Logic ‘1’ Input – 2.5 mA
- With Logic ‘0’ Input – 300 µA
• Low Output Impedance – 7 Ω
• Latch-Up Protected: Will Withstand >300 mA
Reverse Current
• ESD Protected – 4 kV
Applications
• Small Motor Drive
• Power MOSFET Driver
• Driving Bipolar Transistors
General Description
The TC4431/TC4432 are 30V CMOS buffer/drivers
suitable for use in high-side driver applications. They
will not latch up under any conditions within their power
and voltage ratings. They can accept, without damage
or logic upset, up to 300 mA of reverse current (of
either polarity) being forced back into their outputs. All
terminals are fully protected against up to 4 kV of
electrostatic discharge.
Under-voltage lockout circuitry forces the output to a
‘low’ state when the input supply voltage drops below
7V. For operation at lower voltages, disable the lockout
and start-up circuit by grounding pin 3 (LOCK DIS
); for
all other situations, pin 3 (LOCK DIS) should be left
floating. The under-voltage lockout and start-up circuit
gives brown out protection when driving MOSFETS.
Package Type
OUT
TC4431
1
2
3
4
V
DD
5
6
7
8
OUT
GND
V
DD
IN
LOCK DIS
GND
TC4432
1
2
3
4
V
DD
5
6
7
8
OUT
GND
V
DD
IN
GND
2
7
Inverting
Non Inverting
OUT
6
LOCK DIS
2
7
6
8-Pin PDIP/SOIC/CERDIP
1.5A High-Speed 30V MOSFET Drivers