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LM137 Arkusz danych(PDF) 4 Page - Linear Technology

Numer części LM137
Szczegółowy opis  Negative Adjustable Regulator
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Strona internetowa  http://www.linear.com
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LT137A/LM137
LT337A/LM337
4
137afb
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Notes 2, 3)
SYMBOL PARAMETER
CONDITIONS
LT337A
LM337
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
VREF
Reference Voltage
|VIN – VOUT| = 5V, IOUT = 10mA, Tj = 25°C
–1.238
–1.250
–1.262
–1.213
–1.250
–1.287
V
3V ≤
|VIN – VOUT| ≤ 40V
10mA ≤ IOUT ≤ IMAX, P ≤ PMAX
l –1.220 –1.250 –1.280 –1.200 –1.250 –1.300
V
ΔVOUT
ΔIOUT
Load Regulation
10mA ≤ IOUT ≤ IMAX, (Notes 4 and 5)
Tj = 25°C, |VOUT| ≤ 5V
Tj = 25°C, |VOUT| ≥ 5V
|VOUT| ≤ 5V
|VOUT| ≥ 5V
l
l
5
0.1
10
0.2
25
0.5
50
1
15
0.3
20
0.3
50
1
70
1.5
mV
%
mV
%
ΔVOUT
ΔVIN
Line Regulation
3V ≤
|VIN – VOUT| ≤ 40V (Note 4)
Tj = 25°C
l
0.005
0.01
0.01
0.03
0.01
0.02
0.04
0.07
%/V
%/V
Ripple Rejection
VOUT = –10V, f = 120Hz
CADJ = 0
CADJ = 10μF
l
60
70
66
80
66
60
77
dB
dB
Thermal Regulation
Tj = 25°C, 10ms Pulse
0.002
0.02
0.003
0.04
%/W
IADJ
Adjust Pin Current
l
65
100
65
100
μA
ΔIADJ
Adjust Pin Current Change
10mA ≤ IOUT ≤ IMAX
3V ≤
|VIN – VOUT| ≤ 40V
l
l
0.2
1
2
5
0.5
2
5
5
μA
μA
Minimum Load Current
|VIN – VOUT| ≤ 40V
|VIN – VOUT| ≤ 10V
l
l
2.5
1.2
5
3
2.5
1
10
6
mA
mA
ISC
Current Limit
|VIN – VOUT| ≤ 15V,
K, M and T Package
H Package
|VIN – VOUT| = 40V,
K, M and T Package
Tj = 25°C
H Package
l
l
1.5
0.5
0.24
0.15
2.2
0.8
0.5
0.25
1.5
0.5
0.15
0.1
2.2
0.8
0.4
0.17
A
A
A
A
ΔVOUT
ΔTemp
Temperature Stability of
Output Voltage (Note 6)
l
0.6
1.5
0.6
%
ΔVOUT
ΔTime
Long Term Stability
TA = 125°C, 1000 Hours
0.3
1
0.3
1
%
en
RMS Output Noise
(% of VOUT)
TA = 25°C, 10Hz ≤ f ≤ 10kHz
0.003
0.003
%
θJC
Thermal Resistance Junction
to Case
H Package
K Package
M and T Package
12
2.3
3
15
3
5
12
2.3
3
15
3
5
°C/W
°C/W
°C/W
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The shaded electrical specifications indicate those parameters
which have been improved or guaranteed test limits provided for the first
time.
Note 3: Unless otherwise indicated, these specifications apply:
|VIN
– VOUT| = 5V; and IOUT = 0.1A for the H package, IOUT = 0.5A for the K, M,
and T packages. Power dissipation is internally limited. However, these
specifications apply for power dissipation up to 2W for the H package and
20W for the K and T packages. IMAX = 1.5A for the K, M, and T packages,
and 0.2A for the H package.
Note 4: Testing is done using a pulsed low duty cycle technique. See
thermal regulation specifications for output changes due to heating effects.
Load regulation is measured on the output pin at a point 1/8" below the
base of the K and H package and at the junction of the wide and narrow
portion of the lead on the M and T package.
Note 5: Load regulation for the LT337AT is the same as for LM337T.
Note 6: Guaranteed on LT137A and LT337A, but not 100% tested in
production.
Note 7: ISC is tested at the ambient temperatures of 25°C and –55°C. ISC
cannot be tested at the maximum ambient temperature of 150°C due to the
high power level required. ISC specification at 150°C ambient is guaranteed
by characterization and correlation to 25°C testing.


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