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LM138 Datasheet(PDF) 4 Page - Linear Technology

Part # LM138
Description  5A Positive Adjustable Voltage Regulator
PDF  14 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LM138 Datasheet(HTML) 4 Page - Linear Technology

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LT138A/LT339A
LM138/LM338
4
138afd
For more information www.linear.com/LT138A
SYMBOL
PARAMETER
CONDITIONS
MIN
LT138A
TYP
MAX
MIN
LM138
TYP
MAX
UNITS
Ripple Rejection
VOUT = 10V, f = 120Hz
CADJ = 0µF
CADJ = 10µF
l
l
60
60
75
60
60
75
dB
dB
IADJ
Adjust Pin Current
l
45
100
45
100
µA
ΔIADJ
Adjust Pin Current Change
10mA ≤ IOUT ≤ 5A,
3V ≤ (VIN – VOUT) ≤ 35V
l
0.2
5
0.2
5
µA
Minimum Load Current
(VIN – VOUT) = 35V
l
3.5
10
3.5
10
mA
ISC
Current Limit
(VIN – VOUT) ≤ 10V
DC
0.5ms Peak
l
l
5
6
8
12
5
6
8
12
A
A
(VIN – VOUT) = 30V, TJ = 25ºC
1
2
1
A
ΔVOUT
ΔTemp
Temperature Stability
l
1
2
1
%
ΔVOUT
ΔTime
Long-Term Stability
TA = 125ºC, 1000 Hours
0.3
1
0.3
1
%
en
RMS Output Noise (% of VOUT)
10Hz ≤ f ≤ 10kHz
0.001
0.003
%
θJC
Thermal Resistance
Junction-to-Case
K Package
1
1
ºC/W
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Unless otherwise specified, these specifications apply: VIN – VOUT
= 5V and IOUT = 2.5A. These specifications are applicable for power
dissipations up to 50W.
Note 3: See thermal regulation specifications for changes in output voltage
due to heating effects. Load and line regulation are measured at a constant
junction temperature by low duty cycle pulse testing.
Typical perForMance characTerisTics
Load Regulation
Dropout Voltage
Adjustment Current
TEMPERATURE (°C)
–75
–0.4
–0.3
–0.1
0
0.1
–25
25 50
150
138/338 G01
–0.2
–50
0
75 100 125
0.2
IOUT = 5A
IOUT = 3A
VIN = 15V
VOUT = 10V
PRELOAD = 50mA
TEMPERATURE (°C)
–75
1
3
–25
25 50
150
138/338 G02
2
–50
0
75 100 125
4
IOUT = 5A
IOUT = 3A
IOUT = 1A
ΔVOUT = 100mV
TEMPERATURE (°C)
–75
35
40
45
75
65
138A/338A G03
30
–25
25
125
50
55
60
elecTrical characTerisTics The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.



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