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LM138 データシート(PDF) 6 Page - STMicroelectronics

部品番号 LM138
部品情報  Three-terminal 5 A adjustable voltage regulators
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LM138 データシート(HTML) 6 Page - STMicroelectronics

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Electrical characteristics
LM138 - LM238 - LM338
6/23
4
Electrical characteristics
Table 4.
Electrical characteristics for LM138/LM238 (1)
1.
(TJ = -55 to 150 °C for LM138, TJ = -25 to 150 °C for LM238, VI - VO = 5 V, IO = 2.5 A. Although power dissipation is
internally limited, these specifications apply to power dissipation up to 50 W, unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
KVI
Line regulation (2)
2.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects are taken into
account separately by thermal rejection.
TA = 25°C, VI - VO = 3 to 35 V
0.005
0.01
%/V
KVO
Load regulation (2)
TA = 25°C
IO = 10 mA to 5 A
VO ≤ 5 V
5
15
mV
VO ≥ 5 V
0.1
0.3
%
Thermal regulation
Pulse = 20 ms
0.002
0.01
%/W
IADJ
Adjustment pin current
45
100
µA
ΔIADJ
Adjustment pin current
change
IL = 10 mA to 5 A, VI - VO = 3 to 35 V
0.2
5
µA
VREF
Reference voltage
VI - VO = 3 to 35 V, IO = 10 mA to 5 A
P
≤ 50 W
1.19
1.24
1.29
V
KVI
Line regulation (2)
VI - VO = 3 to 35 V
0.02
0.04
%/V
KVO
Load regulation (2)
IO = 10 mA to 5 A
VO ≤ 5 V
20
30
mV
VO ≥ 5 V
0.3
0.6
%
KVT
Temperature stability
TJ = TMIN to TMAX
1%
IO(MIN) Minimum load current
VI - VO ≤ 35 V
3.5
5
mA
IO(MAX) Current limit
VI - VO ≤ 10 V
DC
5
8
A
0.5 ms Peak
7
12
VI - VO = 30 V
1
VNO
RMS output noise (% of
VO)
Ta = 25°C, f = 10 Hz to 10 kHz
0.003
%
RVF
Ripple rejection ratio
VO = 10 V, f = 120 Hz
60
dB
CADJ = 10 µF
60
75
KVH
Long term stability
TA = 125°C
0.3
1
%


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