LM317T Datasheet, PDF (1/1 Pages) Fairchild Semiconductor – Adjustable Voltage Regulator (Positive)

TIGER ELECTRONIC CO.,LTD
Product specification
3-Terminal Positive Adjustable Regulator
LM317
Features
Output Current In Excess of 1. 5A
Output Adjustable Between 1. 2V and 37V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe Operating Area Compensation
TO-220 Package
Description
This monolithic integrated circuit is an adjustable
3-terminal positive voltage regulator designed to
supply more than 1.5A of load current with
anoutput voltage adjustable over a 1.2 to 37V.
It employs internal current limiting, thermal
shut-down and safe area compensation.
Absolute Maximum Ratings ( Ta = 25 ^OC)
Parameter
Symbol Typ Unit
Input-Output Voltage Differential V_I -V_O
40
V
Lead Temperature
TLEAD
230
o_C
Power Dissipation
Operating Junction Temperature
Range
Storage Temperature Range
P_D
T_j
T_STG
Internally li
mited
W
0~125
o_C
-65~150 ^oC
Temperature Coefficient of Output
Voltage
Vo/ T
0.02 %/^oC
123
TO-220
1. Adj 2. Output 3. Input
Electrical Characteristics ( Ta = 25 ^OC)
(VI - VO= 5 V, IO= 0.5 A, 0^oC TJ + 125^oC, IMAX = 1.5A,PDMAX = 20W, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Line Regulation (Note1)
Load Regulation (Note1)
Adjustable Pin Current
Adjustable Pin Current Change
Reference Voltage
Rline
Rload
I_ADJ
I_ADJ
V_REF
TA = +25^oC
3V V_I - V_O 40V
3V V_I - V_O 40V
TA = +25^oC, 10mA I_O I_MAX
V_O < 5V
V_O 5V
10mA I_O I_MAX
V_O < 5V
V_O 5V
-
3V V_I - V_O 40V
10mA I_O I_MAX P_D
3V V_IN - V_O 40V
10mA I_O I_MAX
P_D P_MAX
P_MAX
-
0.01 0.04
%/V
-
0.02 0.07
-
18
25
0.4
0.5 _{mV % / VO}
-
40
70
0.8
1.5
-
46
100
A
-
2.0
5
A
1.20 1.25 1.30
V
Maximum Output Current
I_O(MAX)
V_I - V_O 15V, P_D P_MAX
V_I - V_O 40V, P_D P_MAX
1.0
2.0
0.3
-
A
Ripple Rejection
V_O = 10V, f = 120Hz
RR without CADJ
C_ADJ = 10 F (Note2)
66
60
-
dB
75
Note:
1. Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must be taken
into account separately. Pulse testing with low duty is used. (PMAX = 20W)
2. CADJ, when used, is connected between the adjustment pin and ground.