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LM2574M-12 датащи(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали LM2574M-12
подробное описание детали  SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2574M-12 датащи(HTML) 5 Page - National Semiconductor (TI)

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LM2574-ADJ, LM2574HV-ADJ
Electrical Characteristics (Continued)
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
7V
≤ V
IN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A
1.230
V
LM2574
V
OUT Programmed for 5V. Circuit of Figure 2
1.193/1.180
V(Min)
1.267/1.280
V(Max)
V
FB
Feedback Voltage
7V
≤ V
IN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A
1.230
LM2574HV
V
OUT Programmed for 5V. Circuit of Figure 2
1.193/1.180
V(Min)
1.273/1.286
V(Max)
η
Efficiency
V
IN = 12V, VOUT = 5V, ILOAD = 0.5A
77
%
All Output Voltage Versions
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 for the 3.3V, 5V, and Adjustable version, VIN = 25V for the 12V version,
and V
IN = 30V for the 15V version. ILOAD = 100 mA.
Symbol
Parameter
Conditions
LM2574-XX
Units
(Limits)
LM2574HV-XX
Typ
Limit
(Note 2)
DEVICE PARAMETERS
I
b
Feedback Bias
Current
Adjustable Version Only, V
OUT = 5V
50
100/500
nA
f
O
Oscillator Frequency
(see Note 10)
52
kHz
47/42
kHz(Min)
58/63
kHz(Max)
V
SAT
Saturation Voltage
I
OUT = 0.5A (Note 4)
0.9
V
1.2/1.4
V(max)
DC
Max Duty Cycle
(ON)
(Note 5)
98
%
93
%(Min)
I
CL
Current Limit
Peak Current, (Notes 4, 10)
1.0
A
0.7/0.65
A(Min)
1.6/1.8
A(Max)
I
L
Output Leakage
(Notes 6, 7)
Output = 0V
2
mA(Max)
Current
Output = −1V
7.5
mA
Output = −1V
30
mA(Max)
I
Q
Quiescent Current
(Note 6)
5
mA
10
mA(Max)
I
STBY
Standby Quiescent
ON /OFF Pin= 5V (OFF)
50
µA
Current
200
µA(Max)
θ
JA
Thermal Resistance
N Package, Junction to Ambient (Note 8)
92
θ
JA
N Package, Junction to Ambient (Note 9)
72
˚C/W
θ
JA
M Package, Junction to Ambient (Note 8)
102
θ
JA
M Package, Junction to Ambient (Note 9)
78
www.national.com
5


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