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LM2576 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2576
Description  SIMPLE SWITCHER 3A Step-Down Voltage Regulator
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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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
LM2576
45V
LM2576HV
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 Seconds)
260˚C
Operating Ratings
Temperature Range
LM2576/LM2576HV
−40˚C
≤ T
J
≤ +125˚C
Supply Voltage
LM2576
40V
LM2576HV
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
LM2576-3.3
Units
(Limits)
LM2576HV-3.3
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2
V
OUT
Output Voltage
V
IN = 12V, ILOAD = 0.5A
3.3
V
Circuit of Figure 2
3.234
V(Min)
3.366
V(Max)
V
OUT
Output Voltage
6V
≤ V
IN
≤ 40V, 0.5A ≤ I
LOAD
≤ 3A
3.3
V
LM2576
Circuit of Figure 2
3.168/3.135
V(Min)
3.432/3.465
V(Max)
V
OUT
Output Voltage
6V
≤ V
IN
≤ 60V, 0.5A ≤ I
LOAD
≤ 3A
3.3
V
LM2576HV
Circuit of Figure 2
3.168/3.135
V(Min)
3.450/3.482
V(Max)
η
Efficiency
V
IN = 12V, ILOAD =3A
75
%
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 Tem-
perature Range.
Symbol
Parameter
Conditions
LM2576-5.0
Units
(Limits)
LM2576HV-5.0
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2
V
OUT
Output Voltage
V
IN = 12V, ILOAD = 0.5A
5.0
V
Circuit of Figure 2
4.900
V(Min)
5.100
V(Max)
V
OUT
Output Voltage
0.5A
≤ I
LOAD
≤ 3A,
5.0
V
LM2576
8V
≤ V
IN
≤ 40V
4.800/4.750
V(Min)
Circuit of Figure 2
5.200/5.250
V(Max)
V
OUT
Output Voltage
0.5A
≤ I
LOAD
≤ 3A,
5.0
V
LM2576HV
8V
≤ V
IN
≤ 60V
4.800/4.750
V(Min)
Circuit of Figure 2
5.225/5.275
V(Max)
www.national.com
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