Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Supply Voltage
ON /OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
(Steady State)
Power Dissipation
Storage Temperature Range
ESD Susceptibility
45V
−0.3
≤
V
≤
+25V
−0.3
≤
V
≤
+25V
−1V
Internally limited
−65˚C to +150˚C
Human Body Model (Note 2)
Lead Temperature
S Package
Vapor Phase (60 sec.)
Infrared (10 sec.)
T Package (Soldering, 10 sec.)
Maximum Junction Temperature
2 kV
+215˚C
+245˚C
+260˚C
+150˚C
Operating Conditions
Temperature Range
Supply Voltage
−40˚C
≤
T
J
≤
+125˚C
4.5V to 40V
LM2595-3.3
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over
full Operating Tempera-
ture Range.
Symbol
Parameter
Conditions
Typ
(Note 3)
SYSTEM PARAMETERS
(Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
4.75V
≤
V
IN
≤
40V, 0.1A
≤
I
LOAD
≤
1A
3.3
3.168/3.135
3.432/3.465
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
78
V
V(min)
V(max)
%
LM2595-3.3
Limit
(Note 4)
Units
(Limits)
LM2595-5.0
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over
full Operating Tempera-
ture Range.
Symbol
Parameter
Conditions
Typ
(Note 3)
SYSTEM PARAMETERS
(Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
7V
≤
V
IN
≤
40V, 0.1A
≤
I
LOAD
≤
1A
5.0
4.800/4.750
5.200/5.250
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
82
V
V(min)
V(max)
%
LM2595-5.0
Limit
(Note 4)
Units
(Limits)
LM2595-12
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over
full Operating Tempera-
ture Range.
Symbol
Parameter
Conditions
Typ
(Note 3)
SYSTEM PARAMETERS
(Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
15V
≤
V
IN
≤
40V, 0.1A
≤
I
LOAD
≤
1A
12.0
11.52/11.40
12.48/12.60
η
Efficiency
V
IN
= 25V, I
LOAD
= 1A
90
V
V(min)
V(max)
%
LM2595-12
Limit
(Note 4)
Units
(Limits)
3
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