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LM138 - LM238 - LM338
Electrical characteristics
7/23
Table 5.
Electrical characteristics for LM338 (1)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
KVI
Line regulation (2)
TA = 25°C, VI - VO = 3 to 35 V
0.005
0.03
%/V
KVO
Load regulation (2)
TA = 25°C
IO = 10 mA to 5 A
VO ≤ 5 V
5
25
mV
VO ≥ 5 V
0.1
0.5
%
Thermal regulation
Pulse = 20 ms
0.002
0.02
%/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
0.06
%/V
KVO
Load regulation (2)
IO = 10 mA to 5 A
VO ≤ 5 V
20
50
mV
VO ≥ 5 V
0.3
1
%
KVT
Temperature stability
TJ = TMIN to TMAX
1%
IO(MIN) Minimum load current
VI - VO ≤ 35 V
3.5
10
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
%
1.
(TJ = 0 to150 °C, 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)
2.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects are taken into
account separately by thermal rejection.


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