Datasheet

µA723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
2N5287
10 kΩ
1N759
R2
R1
500 pF
10 kΩ
V
I
REF
V
CC+
V
C
OUTPUT
V
Z
CURR LIM
CURR SENS
IN+
V
CC–
FREQ COMP
IN–
µA723
Regulated Output,
V
O
R3 =
3 kΩ
R4 =
3 kΩ
Figure 8. Negative Floating Regulator
0.1 µF
R1
R2
1 kΩ
1 MΩ
1N4005
L = 1.2 mH
(see Note A)
2N5005
2N5153
3 kΩ
V
I
51 Ω
REF
V
CC+
V
C
OUTPUT
V
Z
CURR LIM
CURR SENS
IN+
V
CC–
FREQ COMP
IN–
µA723
NOTE A: L is 40 turns of No. 20 enameled copper wire wound on Ferroxcube P36/22-3B7 potted core, or equivalent, with a 0.009-inch air gap.
Regulated Output,
V
O
Figure 9. Positive Switching Regulator