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
LM2574
LM2574HV
ON /OFF Pin Input Voltage
Output Voltage to Ground
(Steady State)
Minimum ESD Rating
(C = 100 pF, R = 1.5 kΩ)
Storage Temperature Range
45V
63V
−0.3V
≤
V
≤
+V
IN
−1V
2 kV
−65˚C to +150˚C
Lead Temperature
(Soldering, 10 seconds)
Maximum Junction Temperature
Power Dissipation
260˚C
150˚C
Internally Limited
Operating Ratings
Temperature Range
LM2574/LM2574HV
Supply Voltage
LM2574
LM2574HV
−40˚C
≤
T
J
≤
+125˚C
40V
60V
LM2574-3.3, LM2574HV-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
SYSTEM PARAMETERS
(Note 3) Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 100 mA
LM2574-3.3
LM2574HV-3.3
Limit
(Note 2)
3.3
3.234
3.366
V
OUT
Output Voltage
LM2574
V
OUT
Output Voltage
LM2574HV
η
Efficiency
V
IN
= 12V, I
LOAD
= 0.5A
72
4.75V
≤
V
IN
≤
60V, 0.1A
≤
I
LOAD
≤
0.5A
3.3
3.168/3.135
3.450/3.482
V(Min)
V(Max)
%
4.75V
≤
V
IN
≤
40V, 0.1A
≤
I
LOAD
≤
0.5A
3.3
3.168/3.135
3.432/3.465
V
V(Min)
V(Max)
V
V(Min)
V(Max)
Units
(Limits)
LM2574-5.0, LM2574HV-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
SYSTEM PARAMETERS
(Note 3) Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 100 mA
LM2574-5.0
LM2574HV-5.0
Limit
(Note 2)
5
4.900
5.100
V
OUT
Output Voltage
LM2574
V
OUT
Output Voltage
LM2574HV
η
Efficiency
V
IN
= 12V, I
LOAD
= 0.5A
77
7V
≤
V
IN
≤
60V, 0.1A
≤
I
LOAD
≤
0.5A
5
4.800/4.750
5.225/5.275
V(Min)
V(Max)
%
7V
≤
V
IN
≤
40V, 0.1A
≤
I
LOAD
≤
0.5A
5
4.800/4.750
5.200/5.250
V
V(Min)
V(Max)
V
V(Min)
V(Max)
Units
(Limits)
3
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