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LM2574 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2574
Description  SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2574 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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LM2574-12, LM2574HV-12
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
LM2574-12
Units
(Limits)
LM2574HV-12
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN = 25V, ILOAD = 100 mA
12
V
11.76
V(Min)
12.24
V(Max)
V
OUT
Output Voltage
15V
≤ V
IN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A
12
V
LM2574
11.52/11.40
V(Min)
12.48/12.60
V(Max)
V
OUT
Output Voltage
15V
≤ V
IN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A
12
LM2574HV
11.52/11.40
V(Min)
12.54/12.66
V(Max)
η
Efficiency
V
IN = 15V, ILOAD = 0.5A
88
%
LM2574-15, LM2574HV-15
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
LM2574-15
Units
(Limits)
LM2574HV-15
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN = 30V, ILOAD = 100 mA
15
V
14.70
V(Min)
15.30
V(Max)
V
OUT
Output Voltage
18V
≤ V
IN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A
15
V
LM2574
14.40/14.25
V(Min)
15.60/15.75
V(Max)
V
OUT
Output Voltage
18V
≤ V
IN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A
15
LM2574HV
14.40/14.25
V(Min)
15.68/15.83
V(Max)
η
Efficiency
V
IN = 18V, ILOAD = 0.5A
88
%
LM2574-ADJ, LM2574HV-ADJ
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. Unless otherwise specified, V
IN = 12V, ILOAD = 100 mA.
Symbol
Parameter
Conditions
LM2574-ADJ
Units
(Limits)
LM2574HV-ADJ
Typ
Limit
(Note 2)
SYSTEM PARAMETERS (Note 3) Test Circuit
Figure 2
V
FB
Feedback Voltage
V
IN = 12V, ILOAD = 100 mA
1.230
V
1.217
V(Min)
1.243
V(Max)
www.national.com
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