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参数资料
| 型号： | LM2575WT |
| 厂商： | Micrel Inc |
| 文件页数： | 4/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A TO220-5 |
| 标准包装： | 50 |
| 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： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | TO-220-5 |
| 包装： | 管件 |
| 供应商设备封装： | TO-220-5 |
Micrel, Inc.
Absolute Maximum Ratings (1)
Maximum Supply Voltage (V IN ) ......................................45V
ON/OFF Pin Input Voltage. ...................... –0.3V ≤ V ≤ +40V
Output Voltage to Ground (Steady State) ...................... –1V
LM2575
Operating Ratings
Supply Voltage (V IN ).......................................................40V
Junction Temperature Range (T J ).......–40°C ≤ T J ≤ +125°C
Power Dissipation .....................................Internally Limited
Maximum Junction Temperature................................ 150°C
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (T s ) ......................... –65°C to +150°C
Minimum ESD Rating
C = 100pF, R = 1.5k ? .............................................. 2kV
FB Pin ...................................................................... 1kV
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 = 200mA.
LM2575
Limit
Units
Symbol Parameter Condition
Typ
(Note 2)
(Limits)
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3) Test Circuit Figure 1
V OUT
Feedback Voltage
Feedback Voltage LM2575
V IN = 12V , I LOAD = 0.2A
V OUT = 5V
0.2A ≤ I LOAD ≤ 1A, 8V ≤ V IN ≤ 40V
V OUT = 5V
1.230
1.230
1.217
1.243
1.193/ 1.180
1.267/ 1.280
V
V(min)
V(max)
V
V(min)
V(max)
η
Efficiency V IN = 12V, I LOAD = 1A, V OUT = 5V
82
%
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit Figure 1
V OUT
Output Voltage
Output Voltage LM2575-3.3
V IN = 12V , I LOAD = 0.2A
V OUT = 3.3V
0.2A ≤ I LOAD ≤ 1A, 8V ≤ V IN ≤ 40V
V OUT = 3.3V
3.3
3.3
3.234
3.366
3.168/ 3.135
3.432/ 3.465
V
V(min)
V(max)
V
V(min)
V(max)
η
Efficiency V IN = 12V, I LOAD = 1A
75
%
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit Figure 1
V OUT
Output Voltage
Output Voltage LM2575-5.0
V IN = 12V , I LOAD = 0.2A
V OUT = 5V
0.2A ≤ I LOAD ≤ 1A, 8V ≤ V IN ≤ 40V
V OUT = 5V
5.0
5.0
4.900
5.100
4.800/ 4.750
5.200/ 5.250
V
V(min)
V(max)
V
V(min)
V(max)
η
Efficiency V IN = 12V, I LOAD = 1A
82
%
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1
V OUT
η
Output Voltage
Output Voltage LM2575-12
Efficiency
V IN = 25V , I LOAD = 0.2A
V OUT = 12V
0.2A ≤ I LOAD ≤ 1A, 15V ≤ V IN ≤ 40V
V OUT = 12V
V IN = 25V, I LOAD = 1A
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)
%
May 2009
4
M9999-051209-B
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