LM138 데이터 시트보기 (PDF) - STMicroelectronics
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LM138 Datasheet PDF : 12 Pages
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LM138-LM238-LM338
ELECTRICAL CHARACTERISTICS
LM138:
LM238:
LM338:
-55
-25
0≤
≤ Tj
≤ Tj
Tj ≤
≤≤151105500oCoo,CCV,, IVV-II
- VO
- VO
VO =
= 5V, IO
= 5V, IO
5V, IO =
= 2.5A
= 2.5A
2.5A
Although power dissipation is internally limited, these specifications apply to power dissipation up to
50W (unless otherwise specified).
Symbol
Parameter
LM138-LM238
LM338
Unit
Min. Typ. Max. Min. Typ. Max.
KVI Line Regulation - (note 1)
Tamb = 25 oC, 3 V ≤ (VI - VO) ≤ 35 V
KVO Load Regulation Tamb = 25 oC, 10 mA ≤ IO ≤ 5 A
VO ≤ 5V - (note 1)
VO ≥ 5V - (note 1)
0.005 0.01
5
15
0.1 0.3
0.005 0.03 %/V
5
25 mV
0.1 0.5 %
Thermal Regulation (pulse = 20 ms)
0.002 0.01
0.002 0.02 %/W
Iadj Adjustment Pin Current
45 100
45 100 µA
∆Iadj Adjustment Pin Current Change
10 mA ≤ IL ≤ 5 A, 3 V ≤ (VI - VO) ≤ 35 V
0.2
5
0.2
5
µA
v(ref) Reference Voltage
1.19 1.24 1.29 1.19 1.24 1.29 V
3V ≤ (VI - VO) ≤ 35 V, 10 mA ≤ IO ≤ 5A, P ≤ 50W
KVI Line Regulation - (note 1)
3 V ≤ (VI - VO) ≤ 35 V
0.02 0.04
0.02 0.06 %/V
KVO Load Regulation 10 mA ≤ IO ≤ 5 A
VO ≤ 5V - (note 1)
VO ≥ 5V - (note 1)
20 30
0.3 0.6
20 50 mV
0.3
1
%
KVT Temperature Stability (Tmin ≤ Tj ≤ Tmax)
1
1
%
IO(min) Minimum Load Current (VI - VO ≤ 35 V)
3.5
5
3.5 10 mA
IO(max) Current Limit (VI - VO ≤ 10 V)
DC
A
5
8
5
8
0.5 ms Peak
7
12
7
12
VI - VO = 30 V
1
1
RMS Output Noise, % of VO
(Tamb = 25 oC, 10 Hz ≤ f ≤ 10 KHz)
0.003
0.003 %
Rvf Ripple Rejection Ratio
VO = 10 V, f = 120 Hz
Cadi = 10 µF
KVH Long Term Stability (Tamb = 125 oC)
dB
60
60
60 75
60 75
0.3
1
0.3
1
%
Note 1 : 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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