POWER CMOS DRIVERS WITH VOLTAGE TRIPLER
TC4626
TC4627
SWITCHING TIME TEST CIRCUITS
VBOOST
0.1 µF
Ceramic
6
VBOOST
C3
6
C3
10 µF
0.1µF
Ceramic
10 µF
5
INPUT
C1
10 µF
7
2
C1+
C1-
OUTPUT
CL = 1000 pF
INPUT
7
2
C1+
C1-
5
OUTPUT
CL = 1000 pF
C1
10 µF
1
3
C2
10 µF
1
C2
TC4626
4
8
VDD = 5V
3
C2
10 µF
C2
TC4627
4
8
VDD = 5V
+5V
INPUT*
90%
+5V
INPUT*
90%
0V
VBOOST
10%
tD1
90%
tF
tD2
0V
10%
90%
tR
10%
tD2
90%
tF
10%
t
R
90%
VBOOST
tD1
OUTPUT
0V
OUTPUT
0V
10%
10%
* 100kHz SQUARE WAVE, t
r
= t
f
< 10nsec
Figure 1. Inverting Driver Switching Time
* 100kHz SQUARE WAVE, t
r
= t
f
< 10nsec
Figure 2. Non-Inverting Driver Switching Time
4-274
TELCOM SEMICONDUCTOR, INC.