TC4404_16 Datasheet, PDF (9/22 Pages) Microchip Technology – 1.5A Dual Open-Drain MOSFET Drivers

TC4404/TC4405
4.0 APPLICATIONS INFORMATION
4.1 Circuit Layout Guidelines
Long power supply and ground traces should be
avoided as the added inductance causes unwanted
voltage transients. Power and ground planes should be
used wherever possible.
In addition, it is advisable that low ESR (Equivalent
Series Resistance) bypass capacitors (4.7 µF or 10 µF
tantalum) be placed as close to the driver as possible.
In order to minimize the length of the output trace, the
driver should be physically located as close as possible
to the device it is driving.
Input
V_DD = 18V
4.7 µF
1
2
8.7
1
2
4
Input: 100 kHz,
square wave,
t_{RISE =} t_FALL  10 ns
0.1 µF
Output
C_L = 1000 pF
+5V
Input
90%
0V
18V
Output
0V
10%
t_D1
t_F
t_D2
90%
10%
Inverting Driver
t_R
90%
10%
+5V
Input
0V
18V
Output
0V
10%
90%
t_D1
t_R
10%
90%
t_D2
90%
t_F
10%
FIGURE 4-1:
Switching Time Test Circuit.
Noninverting Driver
4.2 Typical Applications
V_DD
(4.5V - 18V)
From TTL
R_T
TC4404
R_T
V_OUT
V_DD
(4.5V - 18V)
From TTL
R_IB
TC4405 R_IB
GND
FIGURE 4-2:
Zero Crossover Current
Totem-Pole Switch.
GND
FIGURE 4-3:
Driving Bipolar Transistors.
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DS20001418E-page 9