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LM2594 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2594
Description  SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2594 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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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
LM2594
45V
LM2594HV
60V
ON /OFF Pin Input Voltage
−0.3
≤ V ≤ +25V
Feedback Pin Voltage
−0.3
≤ V ≤+25V
Output Voltage to Ground
(Steady State)
−1V
Power Dissipation
Internally limited
Storage Temperature Range
−65˚C to +150˚C
ESD Susceptibility
Human Body Model (Note 2)
2 kV
Lead Temperature
M8 Package
Vapor Phase (60 sec.)
+215˚C
Infrared (15 sec.)
+220˚C
N Package (Soldering, 10 sec.)
+260˚C
Maximum Junction Temperature
+150˚C
Operating Conditions
Temperature Range
−40˚C
≤ T
J +125˚C
Supply Voltage
LM2594
4.5V to 40V
LM2594HV
4.5V to 60V
LM2594/LM2594HV-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.V
INmax= 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
V
OUT
Output Voltage
4.75V
≤ V
IN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
3.3
V
3.168/3.135
V(min)
3.432/3.465
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 0.5A
80
%
LM2594/LM2594HV-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
LM2594/LM2594HV-5.0
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
7V
≤ V
IN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
5.0
V
4.800/4.750
V(min)
5.200/5.250
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 0.5A
82
%
LM2594/LM2594HV-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
LM2594/LM2594HV-12
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
15V
≤ V
IN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
12.0
V
11.52/11.40
V(min)
12.48/12.60
V(max)
η
Efficiency
V
IN = 25V, ILOAD = 0.5A
88
%
www.national.com
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