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LM317 Datasheet Preview

LM317 Datasheet

Three-terminal positive voltage regulator

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JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
TO-252-2L Plastic-Encapsulate Voltage Regulators
LM317 Three-terminal positive voltage regulator
DESCRIPTION
This monolithic integrated circuit is an adjustable 3-terminal
positive voltage regulator designed to supply more than 1.5A
of load current with an output voltage adjustable over a 1.2
to 37V. It employs internal current limiting , thermal shut-down
and safe area compensation.
FEATURE
z Internal thermal overload protection
z Internal short circuit current limiting
z Output transistor safe operating area compensation
Internal Block Diagram
InpVuint 3
TO-252-2L
1. Adj
2. Output
3. Input
Voltage
Reference
+
-
Protection
Circuitry
1
Vadj
Typical Application
Rlimit
2 Vo
Output
Ci is required when regulator is located an appreciable distance from power supply filter.
Co is not needed for stability , however, it does improve transient response.
Since IADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications.
www.cj-elec.com
1
D,Mar,2016




JCET

LM317 Datasheet Preview

LM317 Datasheet

Three-terminal positive voltage regulator

No Preview Available !

Absolute Maximum Ratings
Symbol
VI-VO
TLEAD
PD
TJ
Tstg
ΔVO /ΔT
Parameter
Input-Output Voltage Differential
Lead Temperature
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
Temperature Coefficient of Output Voltage
Value
40
230
Internally limited
0~125
-55~125
±0.02
Units
V
W
%/
ELECTRICAL CHARACTERISTICS
(VO-VI=5V,IO=0.5A,0TJ+125,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
Temperature Stability
Minimum Load Current to Maintain
Regulation
Maximum Output Current
RMS Noise,% of VOUT
Ripple Rejection
Long-Term Stability,TJ=THIGH
Rline
Rload
lADJ
ΔlADJ
VREF
STT
IL(MIN)
IO(MAX)
eN
RR
ST
TA=25
3VVI-VO40V
3VVI-VO40V
TA=25, 10mAIOIMAX
VO<5V
VO5V
10mAIOIMAX
VO<5V
VO5V
-
3VVI-VO40V
10mAIOIMAX, PDPMAX
3VVIN-VO40V
10mAIOIMAX, PDPMAX
-
VI-VO=40V
VI-VO15V, PDPMAX
VI-VO40V, PDPMAX
TA=25
TA=25,10Hzf10KHz
VO=10V, f =120Hz
without CADJ
CADJ=10µF(note2)
TA=25for end point
mesasurements,1000HR
0.01 0.04
0.02 0.07
18 25
0.4 0.5
1.20
1.0
40
0.8
46
2.0
1.25
0.7
3.5
2.2
0.3
70
1.5
100
5
1.30
12
0.003 0.01
66
60
75
0.3 1
%/V
mV
%VO
µA
V
%/ VO
mA
A
%/ VO
dB
%
Thermal Resistance Junction to case
RθJC
-
5 /W
Notes:
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.
www.cj-elec.com
2
D,Mar,2016


Part Number LM317
Description Three-terminal positive voltage regulator
Maker JCET
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LM317 Datasheet PDF






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