MAX828, MAX829

http://onsemi.com

9

0

−1.0

−4.0

20

10

−6.0

−10.0

30

40

Figure 28. Cascade Load Regulation,

Output Voltage vs. Output Current MAX828

A

B

A

3.0

B

5.0

Curve

173

141

C

3.0

D

5.0

179

147

020

10

30

40

Figure 29. Cascade Load Regulation,

Output Voltage vs. Output Current MAX829

C

D

−8.0

−2.0

−3.0

−5.0

−7.0

−9.0

−1.0

−4.0

−6.0

−10.0

−8.0

−2.0

−3.0

−5.0

−7.0

−9.0

+

5

4

2

3

1

OSC

MAX828: Capacitors = 10

mF

MAX829: Capacitors = 3.3

mF

+

Figure 30. Negative Output Voltage Doubler

+

+

+

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.