MAX829 ONSEMI [ON Semiconductor], MAX829 Datasheet - Page 13

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

or more devices. The output current capability is approximately equal to the number of devices paralleled. A single shared
output capacitor is sufficient for proper operation but each device does require it’s own pump capacitor. Note that the output
ripple frequency will be complex since the oscillators are not synchronized. The output resistance is approximately equal to
the output resistance of one device divided by the total number of devices paralleled. The performance characteristics for a
converter consisting of two paralleled devices is shown below.
An increase in converter output current capability with a reduction in output resistance can be obtained by paralleling two
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0
T
A
Output Voltage vs. Output Current MAX828
= 25 C
Figure 40. Tripler Load Regulation,
V
in
10
I
out
, OUTPUT CURRENT (mA)
+
Figure 42. Paralleling Devices for Increased Negative Output Current
20
B
A
1
2
3
Curve
A
B
C
D
OSC
+
30
D
C
V
in
3.0
3.0
5.0
5.0
MAX829 Capacitors = 3.3 mF
MAX828 Capacitors = 10 mF
(V)
MAX828, MAX829
http://onsemi.com
5
4
MBRA120E
MBRA120E
1N4148
1N4148
Diodes
40
13
14.0
12.0
10.0
8.0
6.0
4.0
2.0
1
2
3
0
MAX828
R
T
out
96.5
84.5
78.2
110
A
Output Voltage vs. Output Current MAX829
= 25 C
(W)
OSC
Figure 41. Tripler Load Regulation,
+
MAX829
R
10
I
out
out
96.7
87.3
77.1
111
, OUTPUT CURRENT (mA)
(W)
5
4
20
B
A
+
−V
out
30
D
C
40