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UTCLM317 Datasheet(PDF) 4 Page - Unisonic Technologies

Part # UTCLM317
Description  3-TERMINAL 1A POSITIVE ADJUSTABLE VOLTAGE REGULATOR
PDF  4 Pages
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

UTCLM317 Datasheet(HTML) 4 Page - Unisonic Technologies

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UTCLM317
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R101-009,B
APPLICATION CIRCUIT
1
2
3
Vo
R1
R2
Vi
C1
0.1
µF
Co
1
µF
Iadj
1
2
3
Vo
Vi
D1 1N4002
720
Ω
120
Ω
1k
Ω
1
µF
TTL Level
signal
UTC
LM317
ll
Fig.5 Programmable voltage regulator
Fig.6 Regulator with On-off control
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.
UTC LM317
1
2
3
UTC LM317
1
2
3
Vo
Vi
Vadj
R2
240
Ω
50k
Ω
D1
1N4001
10
µF
Io
Iadj
R1
R2
Vo
Vi
Iomax=(
Vref
R1
)+Iadj=
1.25V
R1
Iomin=(
Vref
R1+R2
)+Iadj=
1.25V
R1+R2
5mA<Io<100mA
Fig.7 Soft start application
Fig.8 Constant current application



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