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参数资料
| 型号： | LM2576WU TR |
| 厂商： | Micrel Inc |
| 文件页数： | 3/9页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A TO263-5 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 37 V |
| 输入电压： | 4 V ~ 40 V |
| 频率 - 开关： | 42kHz ~ 63kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 包装： | 标准包装 |
| 供应商设备封装： | TO-263-5 |
| 产品目录页面： | 1091 (CN2011-ZH PDF) |
| 其它名称： | 576-1539-6 |
LM2576
Absolute Maximum Ratings (Note 1)
Operating Ratings
Micrel, Inc.
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
Storage Temperature Range
Minimum ESD Rating
C = 100pF, R = 1.5k ?
FB Pin
Lead Temperature (soldering, 10 sec.)
Maximum Junction Temperature
45V
– 0.3V ≤ V ≤ +40V
– 1V
Internally Limited
– 65 ° C to +150 ° C
2 kV
1 kV
260 ° C
150 ° C
Temperature Range
Supply Voltage
– 40 ° C ≤ T J ≤ +125 ° C
40V
Electrical Characteristics
Specifications with standard typeface are for T J = 25 ° C, and those with boldface type apply
over full Operating Temperature Range. Unless otherwise specified, V IN = 12V, and I LOAD = 500mA.
LM2576
Symbol
Parameter
Conditions
Typ
Limit
Units
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3) Test Circuit Figure 1
(Note 2)
(Limits)
V OUT
V OUT
η
Feedback Voltage
Feedback Voltage
LM2576
Efficiency
V IN = 12V , I LOAD = 0.5A
V OUT = 5V
0.5A ≤ I LOAD ≤ 3A, 8V ≤ V IN ≤ 40V
V OUT = 5V
V IN = 12V, I LOAD = 3A, V OUT = 5V
1.230
1.230
82
1.217
1.243
1.193/ 1.180
1.267/ 1.280
V
V(min)
V(max)
V
V(min)
V(max)
%
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit Figure 1
V OUT
V OUT
η
Output Voltage
Output Voltage
LM2576-3.3
Efficiency
V IN = 12V , I LOAD = 0.5A
V OUT = 3.3V
0.5A ≤ I LOAD ≤ 3A, 6V ≤ V IN ≤ 40V
V OUT = 3.3V
V IN = 12V, I LOAD = 3A
3.3
3.3
75
3.234
3.366
3.168/ 3.135
3.432/ 3.465
V
V(min)
V(max)
V
V(min)
V(max)
%
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit Figure 1
V OUT
V OUT
η
Output Voltage
Output Voltage
LM2576-5.0
Efficiency
V IN = 12V , I LOAD = 0.5A
V OUT = 5V
0.5A ≤ I LOAD ≤ 3A, 8V ≤ V IN ≤ 40V
V OUT = 5V
V IN = 12V, I LOAD = 3A
5.0
5.0
82
4.900
5.100
4.800/ 4.750
5.200/ 5.250
V
V(min)
V(max)
V
V(min)
V(max)
%
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1
V OUT
V OUT
η
Output Voltage
Output Voltage
LMLM2576-12
Efficiency
V IN = 25V , I LOAD = 0.5A
V OUT = 12V
0.5A ≤ I LOAD ≤ 3A, 15V ≤ V IN ≤ 40V
V OUT = 12V
V IN = 25V, I LOAD = 3A
12
12
88
11.760
12.240
11.520/ 11.400
12.480/ 12.600
V
V(min)
V(max)
V
V(min)
V(max)
%
August 2005
3
M9999-082605-B
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