LM317K-TQ2-T Unisonic Technologies, LM317K-TQ2-T Datasheet - Page 4

• Manufacturer Part Number: LM317K-TQ2-T
• Description: 1.0a Positive Adjustable Voltage Regulator 1.25v To 37v
• Manufacturer: Unisonic Technologies

LM317
0.1 µF
V
V
C1
IN
IN
APPLICATION CIRCUITS
Fig.1 Programmable voltage regulator
V
3
OUT
3
V
= 1.25V*(1+R2/R1)+I
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
UTC LM317
ADJ
Fig.3 Soft Start Application
I
C 1 is required when regulator is located
an appreciated distance from power
supply . Co is needed to improve
transient response .
ADJ
R2
UTC LM317
1
1
R2
240 Ω
2
R1
2
ADJ
*R2
1N4001
10 µF
50kΩ
D1
V
1 µF
Co
OUT
V
OUT
V
IN
V
IN
3
LINEAR INTEGRATED CIRCUIT
UTC LM317
Fig.4 Constant Current Application
Fig.2 Regulator with On-off control
3
1
720Ω
LM317
I
UTC
O(MIN)
I
5mA<I
O(MAX)
D1 1N4002
1
2
=(
=(
OUT
R1+R2
I
ADJ
V
V
REF
<100mA
R1
R1
REF
120Ω
2
)+I
)+I
ADJ
ADJ
R2
=
=
1.25V
R1+R2
1.25V
1kΩ
R1
QW-R101-009,J
TTL Level
I
OUT
signal
1 µF
4 of 5
V
Vo
OUT
UT