MAX829 ONSEMI [ON Semiconductor], MAX829 Datasheet - Page 16

• Manufacturer Part Number: MAX829
• Description: Switched Capacitor Voltage Converter
• Manufacturer: ONSEMI [ON Semiconductor]

constructed by incorporating combinations of the former circuits. The converter shown above combines Figures 24 and 36 to form
a negative output inverter with a positive output doubler. Different combinations of load regulation are shown below. In
Figures 52 and 53 the positive doubler has a constant I
and 55 the negative inverter has the constant I
All of the previously shown converter circuits have only single outputs. Applications requiring multiple outputs can be
−4.0
−4.5
−5.0
−4.0
−4.5
−5.0
9.5
9.0
8.5
9.5
9.0
8.5
0
0
I
Figure 52. Negative Inverter Load Regulation,
Negative Inverter
out
Negative Inverter
I
Figure 54. Positive Doubler Load Regulation,
Output Voltage vs. Output Current, MAX828
out
Output Voltage vs. Output Current, MAX828
, NEGATIVE INVERTER OUTPUT CURRENT (mA)
, POSITIVE DOUBLER OUTPUT CURRENT (mA)
V
10
10
in
Negative Inverter I
T
Negative Inverter R
T
A
A
= 25 C
= 25 C
Figure 51. A Positive Doubler, with a Negative Inverter
+
Positive Doubler
I
Positive Doubler
R
out
out
20
20
= 15 mA
= 21.4 W
out
1
2
3
out
out
= 15 mA and the positive doubler has the variable load.
= 15 mA
= 28.8 W
MAX828, MAX829
OSC
out
http://onsemi.com
= 15 mA while the negative inverter has the variable load. In Figures 54
30
30
16
5
4
−4.0
−4.5
−5.0
−4.0
−4.5
−5.0
9.5
9.0
8.5
9.5
9.0
8.5
+
0
0
I
Figure 53. Negative Inverter Load Regulation,
Negative Inverter
out
Negative Inverter
I
Figure 55. Positive Doubler Load Regulation,
Output Voltage vs. Output Current, MAX829
out
Output Voltage vs. Output Current, MAX829
, NEGATIVE INVERTER OUTPUT CURRENT (mA)
, POSITIVE DOUBLER OUTPUT CURRENT (mA)
+
+
−V
out
10
MAX828: Capacitors = 10 mF
MAX829: Capacitors = 3.3 mF
10
+
Negative Inverter R
Negative Inverter I
T
T
A
A
+V
= 25 C
= 25 C
out
Positive Doubler
I
Positive Doubler
R
out
out
20
20
= 15 mA
= 20 W
out
out
= 15 mA
= 28 W
30
30