碌A7800
SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS056J 鈥?MAY 1976 鈥?REVISED MAY 2003
APPLICATION INFORMATION
+V
0.33
碌F
碌A78xx
+VO
0.1
碌F
Figure 1. Fixed-Output Regulator
+
VI
鈥?/div>
IN
碌A78xx
COM
OUT
IL
G
鈥揤O
Figure 2. Positive Regulator in Negative Configuration (V
I
Must Float)
Input
碌A78xx
IO
0.33
碌F
R2
R1
Output
0.1
碌F
NOTE A: The following formula is used when Vxx is the nominal output voltage (output to common) of the fixed regulator:
V
O
+
V
)
xx
V
xx
R1
)
I
Q
R2
Figure 3. Adjustable-Output Regulator
Input
0.33
碌F
碌A78xx
VO(Reg)
R1
Output
IO
IO = (VO/R1) + IO Bias Current
Figure 4. Current Regulator
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
7
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