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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)： | 3/24頁 |
| 文件大?。?/td> | 750K |
| 代理商： | LB03 |
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
LM2576
LM2576HV
ON /OFF Pin Input Voltage
Output Voltage to Ground
(Steady State)
Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
45V
63V
0.3V
≤
V
≤
+V
IN
1V
Internally Limited
65C to +150C
150C
Minimum ESD Rating
(C = 100 pF, R = 1.5 k
)
Lead Temperature
(Soldering, 10 Seconds)
2 kV
260C
Operating Ratings
Temperature Range
LM2576/LM2576HV
Supply Voltage
LM2576
LM2576HV
40C
≤
T
J
≤
+125C
40V
60V
LM2576-3.3, LM2576HV-3.3
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
LM2576-3.3
LM2576HV-3.3
Typ
Units
(Limits)
Limit
(Note 2)
SYSTEM PARAMETERS
(Note 3)
Test Circuit
Figure 2
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 0.5A
Circuit of
Figure 2
3.3
V
3.234
3.366
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
%
V
OUT
Output Voltage
LM2576
6V
≤
V
IN
≤
40V, 0.5A
≤
I
LOAD
≤
3A
Circuit of
Figure 2
3.3
3.168/
3.135
3.432/
3.465
V
OUT
Output Voltage
LM2576HV
6V
≤
V
IN
≤
60V, 0.5A
≤
I
LOAD
≤
3A
Circuit of
Figure 2
3.3
3.168/
3.135
3.450/
3.482
η
Efficiency
V
IN
= 12V, I
LOAD
= 3A
75
LM2576-5.0, LM2576HV-5.0
Electrical Characteristics
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
V
OUT
Output Voltage
V
IN
= 12V, I
LOAD
= 0.5A
Circuit of
Figure 2
5.0
V
4.900
5.100
V(Min)
V(Max)
V
V(Min)
V(Max)
V
V(Min)
V(Max)
V
OUT
Output Voltage
LM2576
0.5A
≤
I
LOAD
≤
3A,
8V
≤
V
IN
≤
40V
Circuit of
Figure 2
0.5A
≤
I
LOAD
≤
3A,
8V
≤
V
IN
≤
60V
Circuit of
Figure 2
5.0
4.800/
4.750
5.200/
5.250
V
OUT
Output Voltage
LM2576HV
5.0
4.800/
4.750
5.225/
5.275
L
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