LM138 STMicroelectronics, LM138 Datasheet - Page 6

• Manufacturer Part Number: LM138
• Description: Three-terminal 5 A adjustable voltage regulators
• Manufacturer: STMicroelectronics

4
Table 4.
1. (T
2. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects are taken into
6/23
Symbol
I
I
O(MAX)
ΔI
O(MIN)
V
V
K
I
K
R
K
K
K
K
ADJ
internally limited, these specifications apply to 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
= -55 to 150 °C for LM138, T
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
Electrical characteristics for LM138/LM238
Parameter
(2)
(2)
(2)
(2)
J
= -25 to 150 °C for LM238, V
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
= 3 to 35 V
I
O
I
- V
- V
= 10 mA to 5 A
O
O
V
V
V
V
DC
0.5 ms Peak
V
= 5 V, I
= 3 to 35 V
(1)
O
O
O
O
I
- V
≤ 5 V
≥ 5 V
≤ 5 V
≥ 5 V
O
O
= 30 V
= 2.5 A. Although power dissipation is
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.
0.01
0.01
1.29
0.04
100
0.3
0.6
15
30
5
5
1
%/W
Unit
%/V
%/V
mV
mV
mA
µA
µA
dB
%
%
%
%
%
V
A