參數(shù)資料
型號(hào)： LB03
廠商： National Semiconductor Corporation
英文描述： SIMPLE SWITCHER 3A Step-Down Voltage Regulator
中文描述： 第3A的SIMPLE SWITCHER降壓穩(wěn)壓器
文件頁數(shù)： 4/24頁
文件大小： 750K
代理商： LB03
LM2576-5.0, LM2576HV-5.0
Electrical Characteristics
(Continued)
Specifications with standard type face are for T
J
= 25C, and those with
Figure 2
boldface type
apply over full Operating Tem-
perature Range.
Symbol
Parameter
Conditions
LM2576-5.0
LM2576HV-5.0
Units
(Limits)
Typ
Limit
(Note 2)
SYSTEM PARAMETERS
(Note 3)
Test Circuit
Figure 2
η
Efficiency
V
IN
= 12V, I
LOAD
= 3A
77
%
LM2576-12, LM2576HV-12
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
LM2576-12
LM2576HV-12
Units
(Limits)
Typ
Limit
(Note 2)
SYSTEM PARAMETERS
(Note 3)
Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 25V, I
LOAD
= 0.5A
Circuit of
Figure 2
12
V
11.76
12.24
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
V
OUT
Output Voltage
LM2576
0.5A
≤
I
LOAD
≤
3A,
15V
≤
V
IN
≤
40V
Circuit of
Figure 2
0.5A
≤
I
LOAD
≤
3A,
15V
≤
V
IN
≤
60V
Circuit of
Figure 2
V
IN
= 15V, I
LOAD
= 3A
12
11.52/
11.40
12.48/
12.60
V
OUT
Output Voltage
LM2576HV
12
11.52/
11.40
12.54/
12.66
η
Efficiency
88
LM2576-15, LM2576HV-15
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
LM2576-15
LM2576HV-15
Units
(Limits)
Typ
Limit
(Note 2)
SYSTEM PARAMETERS
(Note 3)
Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 25V, I
LOAD
= 0.5A
Circuit of
Figure 2
15
V
14.70
15.30
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
V
OUT
Output Voltage
LM2576
0.5A
≤
I
LOAD
≤
3A,
18V
≤
V
IN
≤
40V
Circuit of
Figure 2
0.5A
≤
I
LOAD
≤
3A,
18V
≤
V
IN
≤
60V
Circuit of
Figure 2
V
IN
= 18V, I
LOAD
= 3A
15
14.40/
14.25
15.60/
15.75
V
OUT
Output Voltage
LM2576HV
15
14.40/
14.25
15.68/
15.83
η
Efficiency
88
L
www.national.com
4
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