MAX1720 ON Semiconductor, MAX1720 Datasheet - Page 10

• Manufacturer Part Number: MAX1720
• Description: Switched Capacitor Voltage Inverter
• Manufacturer: ON Semiconductor

the forward voltage drop of each external diode. The performance characteristics for the above converter are shown below.
Note that curves A and C show the circuit performance with economical 1N4148 diodes, while curves B and D are with lower
loss MBRA120E Schottky diodes.
Figure 29. Tripler Load Regulation, Output Voltage vs. Output Current
A single device can be used to construct a positive voltage tripler. The output voltage is approximately equal to 3V
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0
0
T
A
= 25°C
10
I
V
out
in
, OUTPUT CURRENT (mA)
V
+
in
20
Figure 30. Load Regulated Negative Output Voltage
Capacitors = 10 mF
1
2
3
D
C
Figure 28. Positive Output Voltage Tripler
+
OSC
30
1
2
3
Capacitors = 10 mF
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B
A
OSC
6
5
4
MAX1720
40
10
6
5
4
100 k
+
+
+
Curve
+
A
B
C
D
+
−V
V
in
3.0
3.0
5.0
5.0
out
(V)
+
V
out
MBRA120E
MBRA120E
All Diodes
1N4148
1N4148
R
out
111
in
97
85
75
minus
(W)