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參數(shù)資料
| 型號(hào)： | LM1575 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | SIMPLE SWITCHER 1A Step-Down Voltage Regulator |
| 中文描述： | 的SIMPLE SWITCHER 1A步降穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 7/27頁(yè) |
| 文件大?。?/td> | 725K |
| 代理商： | LM1575 |
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LM1575-ADJ, LM2575-ADJ, LM2575HV-ADJ
Electrical Characteristics
Specifications with standard type face are for T
J
= 25C, and those with
boldface type
apply over
full Operating Temperature
Range
.
Symbol
Parameter
Conditions
Typ
LM1575-ADJ
LM2575-ADJ
LM2575HV-ADJ
Limit
(Note 3)
Units
(Limits)
Limit
(Note 2)
SYSTEM PARAMETERS
(Note 4) Test Circuit
Figure 2
V
OUT
Feedback Voltage
V
IN
= 12V, I
LOAD
= 0.2A
V
OUT
= 5V
Circuit of
Figure 2
0.2A
≤
I
LOAD
≤
1A,
8V
≤
V
IN
≤
40V
V
OUT
= 5V, Circuit of
Figure 2
0.2A
≤
I
LOAD
≤
1A,
8V
≤
V
IN
≤
60V
V
OUT
= 5V, Circuit of
Figure 2
V
IN
= 12V, I
LOAD
= 1A, V
OUT
= 5V
1.230
V
1.217
1.243
1.217
1.243
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
V
OUT
Feedback Voltage
LM1575/LM2575
1.230
1.205/
1.193
1.255/
1.267
1.193/
1.180
1.267/
1.280
V
OUT
Feedback Voltage
LM2575HV
1.230
1.205/
1.193
1.261/
1.273
1.193/
1.180
1.273/
1.286
η
Efficiency
77
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
= 25C, and those with
boldface type
apply over
full Operating Tempera-
ture Range
. Unless otherwise specified, V
= 12V for the 3.3V, 5V, and Adjustable version, V
IN
= 25V for the 12V version,
and V
IN
= 30V for the 15V version. I
LOAD
= 200 mA.
Symbol
Parameter
Conditions
Typ
LM1575-XX
LM2575-XX
LM2575HV-XX
Limit
(Note 3)
Units
(Limits)
Limit
(Note 2)
DEVICE PARAMETERS
I
b
Feedback Bias Current
f
O
Oscillator Frequency
V
OUT
= 5V (Adjustable Version Only)
(Note 13)
50
52
100/
500
100/
500
nA
kHz
47/
43
58/
62
47/
42
58/
63
kHz(Min)
kHz(Max)
V
V(Max)
%
%(Min)
A
A(Min)
A(Max)
mA(Max)
mA
mA(Max)
mA
mA(Max)
μA
μA(Max)
V
SAT
Saturation Voltage
I
OUT
= 1A (Note 5)
0.9
1.2/
1.4
1.2/
1.4
DC
Max Duty Cycle (ON)
(Note 6)
98
93
93
I
CL
Current Limit
Peak Current (Notes 5, 13)
2.2
1.7/
1.3
3.0/
3.2
2
1.7/
1.3
3.0/
3.2
2
I
L
Output Leakage
Current
(Notes 7, 8)
Output = 0V
Output = 1V
Output = 1V
7.5
30
30
I
Q
Quiescent Current
(Note 7)
5
10/
12
10
I
STBY
Standby Quiescent
Current
ON /OFF Pin = 5V (OFF)
50
200/
500
200
L
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