Philips Semiconductors
Product specification
Precision voltage regulator
µA723/723C
TYPICAL APPLICATIONS (Continued)
V
V
IN
IN
V+
V
C
V+
R
V
C
SC
REGULATED
OUTPUT
V
V
OUT
REF
V
V
OUT
REF
R
SC
CL
CS
R
REGULATED
OUTPUT
1
CL
CS
R
3
INV
N.I.
V–
INV
R
R
1
N.I.
V–
R
3
COMP
R
4
COMP
R
2kΩ
2
2
LOGIC INPUT
Q
1
C
1
2kΩ
C
1
100pF
1nF
NOTE:
NOTE:
R
R
2
2
+ ƪVREF
ƫ
+ ƪVREF
ƫ;
V
x
V
x
R
+ R
3 4
OUT
OUT
R
) R
R
) R
1
2
1
2
R
R
1
2
R
+
for minimum temperature drift
3
R
) R
1
2
R3 may be eliminated for minimum component count
Remote Shutdown Regulator With Current
High Voltage Regulator (V
= 7 to 37V)
OUT
Limiting (V
= 2 to 7V)
OUT
V
IN
16
14
V
R
R
= 3.4Ω
SC
C
R
SC
= 3.6kΩ
REGULATED
OUTPUT
4
V
V
OUT
REF
R
= 500Ω
3
12
10
8
V
I
Z
R
3
KNEE
CL
CS
R
R
1
R
4
6
INV
N.I.
4
COMP
V–
2
C
1
2
1nF
I
SHORT
0
0
10
20
30 40
50
60
OUTPUT CURRENT — mA
NOTES:
V
R
V
(R ) R
)
3
3
4
OUT
SENSE
R
NOTES:
+ ƪ
ƫ
I
)
KNEE
R
R
R
4
4
SC
SC
V
I
R
4
OUT SC
+
– 1
R
V
(I
– I
)
3
KNEE
SENSE
SHORT CKT
R
) R
1
2
+ ƪVREF
ƫ
V
X
OUT
R
4
V
R
SENSE
3
ƪ1 ƫ
R
+
)
SC
I
R
4
V
R
) R
SC
SENSE
3
4
+ ƪ
ƫ
I
X
SHORT CKT
R
R
4
SC
Foldback Current Limiting Regulator (V
= 2 to 7V)
SL00508
OUT
Figure 6. Typical Applications (cont.)
6
1994 Aug 31
ETC [ ETC ]
