
MC34152, MC33152, NCV33152
http://onsemi.com
9
Output Load Regulation
I
O
(mA)
+V
O
(V)
V
O
(V)
0
27.7
27.4
26.4
25.5
24.6
22.6
13.3
12.9
11.9
11.2
10.5
9.4
1.0
10
20
30
50
Figure 23. Controlled MOSFET Drive
Figure 24. Bipolar Transistor Drive
In noise sensitive applications, both conducted and radiated EMI can
be reduced significantly by controlling the MOSFET’s turnon and
turnoff times.
The totempole outputs can furnish negative base current for
enhanced transistor turnoff, with the addition of capacitor C
1
.
V
in
1
R
g(off)
R
g(on)
Base
Charge
Removal
V
in
I
B
1
C
1
+
0
Figure 25. Dual Charge Pump Converter
The capacitor’s equivalent series resistance limits the Drive Output Current to 1.5 A. An
additional series resistor may be required when using tantalum or other low ESR capacitors.
+
V
CC
= 15V
6
2
4
3
5
7
+
5.7V
+
+
+
1
1
V
CC
10k
100k
330
pF
47
0.1
6.8
10
6.8
10
1N5819
1N5819
47
47
+
+
+ V
O
≈
2 .0V
CC
V
O
≈
V
CC
2N3904