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LM338K Arkusz danych(PDF) 3 Page - STMicroelectronics

Numer części LM338K
Szczegółowy opis  THREE-TERMINAL 5 A ADJUSTABLE VOLTAGE REGULATORS
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LM338K Arkusz danych(HTML) 3 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS
LM138: -55
≤ Tj ≤ 150 oC, VI -VO = 5V, IO =2.5A
LM238: -25
≤ Tj ≤ 150 oC, VI -VO = 5V, IO =2.5A
LM338: 0
≤ Tj ≤ 150 oC, VI -VO = 5V, IO = 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
0.005
0.01
0.005
0.03
%/V
KVO
Load Regulation Tamb =25
oC, 10 mA ≤ IO ≤ 5A
VO
≤ 5V - (note 1)
VO
≥ 5V - (note 1)
5
0.1
15
0.3
5
0.1
25
0.5
mV
%
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 ≤ 5A, 3 V ≤ (VI -VO) ≤ 35 V
0.2
5
0.2
5
µA
v(ref)
Reference Voltage
3V
≤ (VI -VO) ≤ 35 V, 10 mA ≤ IO ≤ 5A, P ≤ 50W
1.19
1.24
1.29
1.19
1.24
1.29
V
KVI
Line Regulation - (note 1)
3V
≤ (VI -VO) ≤ 35 V
0.02
0.04
0.02
0.06
%/V
KVO
Load Regulation 10 mA
≤ IO ≤ 5A
VO
≤ 5V - (note 1)
VO
≥ 5V - (note 1)
20
0.3
30
0.6
20
0.3
50
1
mV
%
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
0.5 ms Peak
VI -VO =30 V
5
7
8
12
1
5
7
8
12
1
A
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
µF60
60
75
60
60
75
dB
KVH
Long Term Stability (Tamb = 125
oC)
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.
LM138-LM238-LM338
3/12


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