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Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Supply Voltage
LM1575/LM2575
45V
LM2575HV
63V
ON /OFF Pin Input Voltage
−0.3V
≤
V
≤
+V
IN
Output Voltage to Ground
(Steady State)
−1V
Power Dissipation
Internally Limited
Storage Temperature Range
−65˚C to +150˚C
Maximum Junction Temperature
150˚C
Minimum ESD Rating
(C = 100 pF, R = 1.5 k
Ω
)
2 kV
Lead Temperature
(Soldering, 10 sec.)
260˚C
Operating Ratings
Temperature Range
LM1575
−55˚C
≤
T
J
≤
+150˚C
LM2575/LM2575HV
−40˚C
≤
T
J
≤
+125˚C
Supply Voltage
LM1575/LM2575
40V
LM2575HV
60V
LM1575-3.3, LM2575-3.3, LM2575HV-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
LM1575-3.3
LM2575-3.3
Units
(Limits)
LM2575HV-3.3
Limit
Limit
SYSTEM PARAMETERS
(Note 4) Test Circuit
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 0.2A
3.3
V
Circuit of
3.267
3.234
V(Min)
3.333
3.366
V(Max)
V
OUT
Output Voltage
4.75V
≤
V
IN
≤
40V, 0.2A
≤
I
LOAD
≤
1A
3.3
V
LM1575/LM2575
Circuit of
3.200/
3.168
3.168/
3.135
V(Min)
3.400/
3.432
3.432/
3.465
V(Max)
V
OUT
Output Voltage
4.75V
≤
V
IN
≤
60V, 0.2A
≤
I
LOAD
≤
1A
3.3
V
LM2575HV
Circuit of
3.200/
3.168
3.168/
3.135
V(Min)
3.416/
3.450
3.450/
3.482
V(Max)
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
75
%
LM1575-5.0, LM2575-5.0, LM2575HV-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
LM1575-5.0
LM2575-5.0
Units
(Limits)
LM2575HV-5.0
Limit
Limit
SYSTEM PARAMETERS
(Note 4) Test Circuit
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 0.2A
5.0
V
Circuit of
4.950
4.900
V(Min)
5.050
5.100
V(Max)
V
OUT
Output Voltage
0.2A
≤
I
LOAD
≤
1A,
5.0
V
LM1575/LM2575
8V
≤
V
IN
≤
40V
4.850/
4.800
4.800/
4.750
V(Min)
Circuit of
5.150/
5.200
5.200/
5.250
V(Max)
V
OUT
Output Voltage
0.2A
≤
I
LOAD
≤
1A,
5.0
V
LM2575HV
8V
≤
V
IN
≤
60V
4.850/
4.800
4.800/
4.750
V(Min)
Circuit of
5.175/
5.225
5.225/
5.275
V(Max)
LM1575/LM2575/LM2575HV
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