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LM317 bảng dữ liệu(PDF) 2 Page - Fairchild Semiconductor

tên linh kiện LM317
Giải thích chi tiết về linh kiện  3-Terminal Positive Adjustable Regulator
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nhà sản xuất  FAIRCHILD [Fairchild Semiconductor]
Trang chủ  http://www.fairchildsemi.com
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LM317 bảng dữ liệu(HTML) 2 Page - Fairchild Semiconductor

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2
Absolute Maximum Ratings
Note 1: Absolute Maximum Ratings: are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at
these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended
Operating Conditions” table will define the conditions for actual device operation.
Electrical Characteristic
(VI - VO 5V, IO 0.5A, 0qC d TJ d  125qC, IMAX 1.5A, PDMAX 20W, unless otherwise specified)
Note 2: 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
20S)
Note 3: CADJ, when used, is connected between the adjustment pin and ground.
Parameter
Symbol
Value
Unit
Input-Output Voltage Differential
VI - VO
40
V
Lead Temperature
TLEAD
230
qC
Power Dissipation
PD
Internally limited
W
Operating Junction Temperature Range
Tj
0
a 125
qC
Storage Temperature Range
TSTG
65 a 125
qC
Temperature Coefficient of Output Voltage
'VO/'T
r0.02
% /
qC
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Line Regulation (Note 2)
Rline
TA 25qC
––
0.01
0.04
% / V
3V
d VI  VO d 40V
3V
d VI  VO d 40V
0.02
0.07
% / V
Load Regulation (Note 2)
Rload
TA 25qc, 10mA d IO d IMAX
VO  5V
18.0
25.0
mV% / VO
VO t 5V
0.4
0.5
10mA
d IO d IMAX
VO  5V
40.0
70.0
mV% / VO
VO t 5V
0.8
1.5
Adjustable Pin Current
IADJ
––
46.0
100
PA
Adjustable Pin Current Change
'IADJ
3V
d VI  VO d 40V
2.0
5.0
PA
10mA
d IO d IMAX PD d PMAX
Reference Voltage
VREF
3V
d VIN - VO d 40V
1.20
1.25
1.30
V
10mA
d IO d IMAX
PD d PMAX
Temperature Stability
STT
––
0.7
% / VO
Minimum Load Current to Maintain Regulation
IL(MIN)
VI - VO 40V
3.5
12.0
mA
Maximum Output Current
IO(MAX)
VI - VO d 15V, PD d PMAX
1.0
2.2
A
VI - VO d 40V, PD d PMAX
0.3
TA 25qC
RMS Noise,% of VOUT
eN
TA 25qC, 10Hz d f d 10KHz
0.003
0.01
% / VO
Ripple Rejection
RR
VO 10V, f 120Hz without CADJ
66.0
60.0
dB
CADJ 10PF (Note 3)
75.0
Long-Term Stability, TJ THIGH
ST
TA 25qC for end point measurements, 1000HR
0.3
1.0
%
Thermal Resistance Junction to Case
RTJC
––
5.0
qC / W


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