UTCLM317 View Datasheet(PDF) - Unisonic Technologies
Part Name
Description
MFG CO.
UTCLM317 Datasheet PDF : 4 Pages
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UTCLM317 LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
Vi
C1
0.1 µF
3
Iadj
ll
2
1
R1
R2
Vo
Co
1 µF
D1 1N4002
Vi
3
UTC
2
LM317
1
120Ω
Vo
1 µF
720Ω
1kΩ
TTL Level
signal
Fig.5 Programmable voltage regulator
Vo=1.25V*(1+R2/R1)+Iadj*R2
C1 is required when regulator is located
an appreciated distance from power
supply. Co is needed to improve
transient response.
Fig.6 Regulator with On-off control
Vi
Vo
3 UTC LM317 2
1
Vadj
240 Ω
D1
1N4001
50kΩ
R2
10 µF
Fig.7 Soft start application
Vi
3 UTC LM317 2 R1
R2
Io
Vo
1
Iadj
Iomax=(VRre1f )+Iadj=1.R215V
Iomin=( RV1re+fR2)+Iadj=1R.12+5RV2
5mA<Io<100mA
Fig.8 Constant current application
UTC UNISONIC TECHNOLOGIES CO., LTD. 4
QW-R101-009,B
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