CAT661ELA Datasheet, PDF (13/17 Pages) ON Semiconductor – High Frequency 100mA CMOS Charge Pump, Inverter/Doubler

CAT661
PARALLEL OPERATION
Paralleling CAT661 devices will lower output resistance. As shown in figure 13, each device requires its own pump
capacitor, C2, but the output reservoir capacitor is shared with all devices. The value of C2 should be increased by
a factor of N, where N is the number of devices.
ROUT =
ROUT (of CAT661)
N (NUMBER OF DEVICES)
+
C1
+VIN
8
2 _CAT661
3
"1"
+
C1N
4
5
8
2 _CAT661
3
"N"
4
5
C2
+
Figure 13: Reduce Output Resistance by Paralleling Devices
© 2008 SCILLC. All rights reserved.
13
Characteristics subject to change without notice.
Doc. No. MD-5003, Rev. L