LM338 STMicroelectronics, LM338 Datasheet - Page 7

• Manufacturer Part Number: LM338
• Description: Three-terminal 5 A adjustable voltage regulators
• Manufacturer: STMicroelectronics

Table 5.
1. (T
2. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects are taken into
Symbol
I
I
O(MAX)
ΔI
O(MIN)
V
V
K
I
K
R
K
K
K
K
ADJ
power dissipation up to 50 W, unless otherwise specified)
account separately by thermal rejection.
REF
ADJ
NO
VO
VO
VT
VH
VF
VI
VI
J
= 0 to150 °C, V
Line regulation
Load regulation
Thermal regulation
Adjustment pin current
Adjustment pin current
change
Reference voltage
Line regulation
Load regulation
Temperature stability
Minimum load current
Current limit
RMS output noise (% of
V
Ripple rejection ratio
Long term stability
O
)
Electrical characteristics for LM338
Parameter
I
- V
O
= 5 V, I
(2)
(2)
(2)
(2)
O
= 2.5 A. Although power dissipation is internally limited, these specifications apply to
Pulse = 20 ms
V
T
T
T
I
I
V
P ≤ 50 W
V
I
T
V
T
V
C
O
L
O
A
A
A
J
a
I
I
I
I
O
ADJ
= 10 mA to 5 A, V
- V
- V
- V
- V
= 10 mA to 5 A
= 10 mA to 5 A
= T
= 25°C, f = 10 Hz to 10 kHz
= 125°C
= 25°C, V
= 25°C
= 10 V, f = 120 Hz
O
O
O
O
= 10 µF
MIN
= 3 to 35 V, I
= 3 to 35 V
≤ 35 V
≤ 10 V
to T
Test conditions
I
- V
MAX
O
(1)
= 3 to 35 V
I
O
- V
= 10 mA to 5 A
O
V
V
V
V
DC
0.5 ms Peak
V
= 3 to 35 V
O
O
O
O
I
- V
≤ 5 V
≥ 5 V
≤ 5 V
≥ 5 V
O
= 30 V
Min.
1.19
60
5
7
0.005
0.002
Typ.
1.24
0.02
0.1
0.2
0.3
3.5
0.3
45
20
12
60
75
5
1
8
1
0.003
Max.
0.03
0.02
1.29
0.06
100
0.5
25
50
10
5
1
1
%/W
Unit
%/V
%/V
mV
mV
mA
µA
µA
dB
%
%
%
%
%
V
A
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