NCP1729_06 ONSEMI [ON Semiconductor], NCP1729_06 Datasheet - Page 16

• Manufacturer Part Number: NCP1729_06
• Description: Switched Capacitor Voltage Inverter
• Manufacturer: ONSEMI [ON Semiconductor]

transistors and two Schottky diodes. The output voltage is approximately equal to −V
of both transistors and the forward voltage of both diodes. The performance characteristics for the converter are shown below.
Note that the output resistance is reduced to 1.0 W.
The output current capability of the NCP1729 can be extended beyond 600 mA with the addition of two external switch
V
in
Figure 37. External Switch for Increased Negative Output Current
+
−V
−2.0
−2.2
−2.4
−2.6
−2.8
−3.0
−3.2
out
C
= V
3
0
1
2
3
Figure 38. Current Boosted Load Regulation,
in
−V
BE(Q1) −
0.1
Output Voltage vs. Output Current
OSC
I
out
V
http://onsemi.com
, OUTPUT CURRENT (mA)
BE(Q2)
0.2
NCP1729
6
5
4
−2 V
16
0.3
F
Q
Q
0.4
2
1
C
C
Q
Q
+
1
3
1
2
C
= C
= 220 mF
= PZT751
= PZT651
V
R
T
1
A
in
out
2
= 25°C
= 5.0 V
= 470 mF
= 1.0 W
0.5
in
+
minus the sum of the base emitter drops
0.6
C
2
−V
out