Datasheet

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  
SLVS050D − JUNE 1976 − REVISED JANUARY 2005
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
R
CL
V+
I
O
I
O
[
V
I(ref)
R
CL
V
O
V+
GND
IN
OUT
R1
R2
V
O
+
ǒ
1 )
R1
R2
Ǔ
V
I(ref)
Min V
O
+ V
I(ref)
) 5V
µA7805 Regulator
Figure 7. Current Limiter Figure 8. Output Control of a 3-Terminal
Fixed Regulator
V
O
R2
V+
R1
V
O
[
ǒ
1 )
R1
R2
Ǔ
V
I(ref)
V
O
V+
R1
R2
Q1
V
limit
[
ǒ
1 )
R1
R2
Ǔ
ǒ
V
I(ref)
) V
BE(Q1)
Ǔ
Figure 9. Higher-Current Applications Figure 10. Crowbar
R1B
V
CC
R1A
R2B
R2A
Low limit [ V
I(ref)
ǒ
1 )
R1B
R2B
Ǔ
) V
D
High limit [ V
I(ref)
ǒ
1 )
R1A
R2A
Ǔ
Figure 11. V
CC
Monitor