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LM2574N-15 Arkusz danych(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numer części LM2574N-15
Szczegółowy opis  SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - 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
LM2574
45V
LM2574HV
63V
ON /OFF Pin Input Voltage
−0.3V
≤ V ≤ +V
IN
Output Voltage to Ground
(Steady State)
−1V
Minimum ESD Rating
(C = 100 pF, R = 1.5 k
Ω)2 kV
Storage Temperature Range
−65˚C to +150˚C
Lead Temperature
(Soldering, 10 seconds)
260˚C
Maximum Junction Temperature
150˚C
Power Dissipation
Internally Limited
Operating Ratings
Temperature Range
LM2574/LM2574HV
−40˚C
≤ T
J ≤ +125˚C
Supply Voltage
LM2574
40V
LM2574HV
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
LM2574-3.3
Units
(Limits)
LM2574HV-3.3
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN = 12V, ILOAD = 100 mA
3.3
V
3.234
V(Min)
3.366
V(Max)
V
OUT
Output Voltage
4.75V
≤ V
IN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A
3.3
V
LM2574
3.168/3.135
V(Min)
3.432/3.465
V(Max)
V
OUT
Output Voltage
4.75V
≤ V
IN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A
3.3
LM2574HV
3.168/3.135
V(Min)
3.450/3.482
V(Max)
η
Efficiency
V
IN = 12V, ILOAD = 0.5A
72
%
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
LM2574-5.0
Units
(Limits)
LM2574HV-5.0
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN = 12V, ILOAD = 100 mA
5
V
4.900
V(Min)
5.100
V(Max)
V
OUT
Output Voltage
7V
≤ V
IN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A
5
V
LM2574
4.800/4.750
V(Min)
5.200/5.250
V(Max)
V
OUT
Output Voltage
7V
≤ V
IN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A
5
LM2574HV
4.800/4.750
V(Min)
5.225/5.275
V(Max)
η
Efficiency
V
IN = 12V, ILOAD = 0.5A
77
%
www.national.com
3


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