Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
(Note 3)
Input Voltage
Input-Output Differential
20V
20V
Power Dissipation
Internally Limited
Operating Junction Temperature Range
b
55 C to
a
150 C
LM145
LM345
0 C to
a
125 C
Storage Temperature Range
Lead Temperature (Soldering 10 sec )
b
65 C to
a
150 C
300 C
Electrical Characteristics
(Note 1)
Limits
Parameter
Conditions
Min
Output Voltage
Line Regulation (Note 2)
Load Regulation (Note 2)
Output Voltage
T
j
e
25 C I
OUT
e
5 mA
V
IN
e b
7 5
T
j
e
25 C
b
20V
s
V
IN
s
b
7 5V
T
j
e
25 C V
IN
e b
7 5V
5 mA
s
I
OUT
s
3A
b
20V
s
V
IN
s
b
7 8V
b
5 1
LM145
Typ
b
5 0
LM345
Max
b
4 9
Units
Max
b
4 8
Min
b
5 2
Typ
b
5 0
V
mV
mV
5
30
15
75
5
30
25
100
5 mA
s
I
OUT
s
3A
P
s
25W
T
MIN
s
T
j
s
T
MAX
Quiescent Current
Short Circuit Current
Output Noise Voltage
Long Term Stability
Thermal Resistance
Junction to Case
b
20V
s
V
IN
s
b
7 5V
b
5 20
b
4 80
b
5 25
b
4 75
V
5 mA
s
I
OUT
s
3A
V
IN
e b
7 5V T
j
e a
25 C
V
IN
e b
20V T
j
e a
25 C
T
A
e
25 C C
L
e
4 7
mF
10 Hz
s
f
s
100 kHz
10
4
2
150
5
2
30
55
35
10
4
2
150
30
55
35
mA
A
A
mV
50
5
2
50
mV
C W
Note 1
Unless otherwise specified these specifications apply
b
55 C
s
T
j
s
a
150 C for the LM145 and 0 C
s
T
j
s
a
125 C for the LM345 V
IN
e
7 5V and
I
OUT
e
5 mA Although power dissipation is internally limited electrical specifications apply only for power levels up to 25W For calculations of junction
temperature rise due to power dissipation use a thermal resistance of 35 C W for the TO-3 with no heat sink With a heat sink use 2 C W for junction to case
thermal resistance
Note 2
Regulation is measured at constant junction temperature Changes in output voltage due to heating effects must be taken into account separately To
ensure constant junction temperature pulse testing with a low duty cycle is used
Note 3
Refer to RETS145K-5V for LM145K-5 0 military specifications
Connection Diagram
Metal Can Package
Typical Applications
Fixed Regulator
TL H 7785 鈥?3
TL H 7785鈥?
Bottom View
Order Number LM345K-5 0
See NS Package Number K02A
Order Number LM145K-5 0 883 or
SMD 5962-9064501
See NS Package Number K02C
2
Required for stability For value given capacitor must be solid tantalum
50
mF
aluminum electrolytic may be substituted Values given may be in-
creased without limit
Required if regulator is separated from filter capacitor For value given ca-
pacitor must be solid tantulum 50
mF
aluminum electrolytic may be substi-
tuted
1
2
3
4
5
6
