UA723C View Datasheet(PDF) - Philips Electronics
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Description
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UA723C Datasheet PDF : 6 Pages
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Philips Semiconductors
Precision voltage regulator
Product specification
µA723/723C
TYPICAL APPLICATIONS (Continued)
VIN
V+
VC
VREF VOUT
RSC
R1
CL
CS
N.I.
INV
R3
V– COMP
R2
2kΩ
C1
Q1
R4
2kΩ
1nF
REGULATED
OUTPUT
LOGIC INPUT
VIN
V+
VC
VREF VOUT
R3
CL
CS
N.I.
INV
RSC
REGULATED
OUTPUT
R1
V– COMP
R2
C1 100pF
NOTE:
ƪ ƫ R2
VOUT + VREF x R1 ) R2
Remote Shutdown Regulator With Current
Limiting (VOUT = 2 to 7V)
VIN
VC
VREF VOUT
VZ
R1
CL
CS
N.I.
INV
R2
V–
COMP
C1
1nF
RSC
R3
R4
REGULATED
OUTPUT
NOTES:
ƪ ƫ VOUT R3
VSENSE (R3 ) R4)
IKNEE + RSC R4 )
RSC R4
ƪ ƫ R1 ) R2
VOUT + VREF X
R4
ƪ ƫ VSENSE R3 ) R4
ISHORT CKT +
RSC X
R4
NOTE:
ƪ ƫ R2
VOUT + VREF x R1 ) R2 ; R3 + R4
R1 R2
R3 + R1 ) R2 for minimum temperature drift
R3 may be eliminated for minimum component count
High Voltage Regulator (VOUT = 7 to 37V)
16
14
RSC = 3.4Ω
R4 = 3.6kΩ
12
R3 = 500Ω
IKNEE
10
8
6
4
2
0
ISHORT
0 10 20 30 40 50 60
OUTPUT CURRENT — mA
NOTES:
R4
VOUT ISC
R3 + VSENSE (IKNEE – ISHORT CKT) – 1
ƪ ƫ VSENSE
RSC + ISC
R3
1 ) R4
Foldback Current Limiting Regulator (VOUT = 2 to 7V)
Figure 6. Typical Applications (cont.)
SL00508
1994 Aug 31
6
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