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
LM2576
LM2576HV
ON /OFF Pin Input Voltage
Output Voltage to Ground
(Steady State)
Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
45V
63V
−0.3V
≤
V
≤
+V
IN
−1V
Internally Limited
−65˚C to +150˚C
150˚C
Minimum ESD Rating
(C = 100 pF, R = 1.5 kΩ)
Lead Temperature
(Soldering, 10 Seconds)
2 kV
260˚C
Operating Ratings
Temperature Range
LM2576/LM2576HV
Supply Voltage
LM2576
LM2576HV
−40˚C
≤
T
J
≤
+125˚C
40V
60V
LM2576-3.3, LM2576HV-3.3
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
boldface type
apply over full Operating Temperature
Range.
Symbol
Parameter
Conditions
Typ
SYSTEM PARAMETERS
(Note 3)
Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 0.5A
Circuit of
Figure 2
V
OUT
Output Voltage
LM2576
V
OUT
Output Voltage
LM2576HV
η
Efficiency
6V
≤
V
IN
≤
40V, 0.5A
≤
I
LOAD
≤
3A
Circuit of
Figure 2
6V
≤
V
IN
≤
60V, 0.5A
≤
I
LOAD
≤
3A
Circuit of
Figure 2
V
IN
= 12V, I
LOAD
= 3A
75
3.3
3.168/3.135
3.450/3.482
3.3
3.168/3.135
3.432/3.465
LM2576-3.3
LM2576HV-3.3
Limit
(Note 2)
3.3
3.234
3.366
V
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
Units
(Limits)
LM2576-5.0, LM2576HV-5.0
Electrical Characteristics
Specifications with standard type face are for T
J
= 25˚C, and those with
Figure 2
boldface type
apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
Typ
SYSTEM PARAMETERS
(Note 3)
Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 0.5A
Circuit of
Figure 2
V
OUT
Output Voltage
LM2576
V
OUT
Output Voltage
LM2576HV
η
Efficiency
0.5A
≤
I
LOAD
≤
3A,
8V
≤
V
IN
≤
40V
Circuit of
Figure 2
0.5A
≤
I
LOAD
≤
3A,
8V
≤
V
IN
≤
60V
Circuit of
Figure 2
V
IN
= 12V, I
LOAD
= 3A
77
5.0
4.800/4.750
5.225/5.275
5.0
4.800/4.750
5.200/5.250
LM2576-5.0
LM2576HV-5.0
Limit
(Note 2)
5.0
4.900
5.100
V
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
Units
(Limits)
3
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