Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Human Body Model (Note 2)
Lead Temperature
2 kV
M8 Package
Vapor Phase (60 sec.)
Infrared (15 sec.)
+215˚C
+220˚C
+260˚C
+150˚C
Maximum Supply Voltage
N Package (Soldering, 10 sec.)
Maximum Junction Temperature
LM2594
45V
60V
LM2594HV
ON /OFF Pin Input Voltage
Feedback Pin Voltage
−0.3 ≤ V ≤ +25V
−0.3 ≤ V ≤+25V
Operating Conditions
Output Voltage to Ground
(Steady State)
Temperature Range
Supply Voltage
LM2594
−40˚C ≤ TJ +125˚C
−1V
Internally limited
−65˚C to +150˚C
Power Dissipation
4.5V to 40V
4.5V to 60V
Storage Temperature Range
ESD Susceptibility
LM2594HV
LM2594/LM2594HV-3.3
Electrical Characteristics
=
Specifications with standard type face are for TJ 25˚C, and those with boldface type apply over full Operating Tempera-
=
ture Range.VINmax 40V for the LM2594 and 60V for the LM2594HV.
Symbol Parameter Conditions
LM2594/LM2594HV-3.3
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1
VOUT
Output Voltage
4.75V ≤ VIN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
3.3
80
V
3.168/3.135
3.432/3.465
V(min)
V(max)
%
= =
VIN 12V, ILOAD 0.5A
η
Efficiency
LM2594/LM2594HV-5.0
Electrical Characteristics
=
Specifications with standard type face are for TJ 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range
Symbol
Parameter
Conditions
LM2594/LM2594HV-5.0
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1
VOUT
Output Voltage
7V ≤ VIN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
5.0
82
V
4.800/4.750
5.200/5.250
V(min)
V(max)
%
= =
VIN 12V, ILOAD 0.5A
η
Efficiency
LM2594/LM2594HV-12
Electrical Characteristics
=
Specifications with standard type face are for TJ 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range
Symbol
Parameter
Conditions
LM2594/LM2594HV-12
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1
VOUT
Output Voltage
15V ≤ VIN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
12.0
88
V
11.52/11.40
12.48/12.60
V(min)
V(max)
%
= =
VIN 25V, ILOAD 0.5A
η
Efficiency
3
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