NCP500

http://onsemi.com

15

Figure 27. Typical Application Circuit

Battery or

Unregulated

Voltage

C1

C2

OFF

ON

1

2

3

5

4

+

+

Figure 28. Typical Application Circuit

Battery or

Unregulated

Voltage

+

C1

OFF

ON

1

3

2

4

5

6

+

C2

Output

R

1

2

3

5

4

Input

1.0

mF

1.0

mF

Output

1

2

3

5

4

Input

1.0

mF

1.0

mF

Q2

Q1

R3

R1

R2

The NCP500 series can be current boosted with a PNP transis-

when the pass transistor begins conducting; this circuit is not

short circuit proof. Input/Output differential voltage minimum is

Q1

0

10

1

75

50

25

0.1

0.01

100

125

150

UNSTABLE

STABLE

Figure 29. Stability

Figure 30. Current Boost Regulator

Figure 31. Current Boost Regulator with Short

Circuit Limit