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参数资料
| 型号： | LM2675M-ADJEP |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH |
| 文件页数： | 3/25页 |
| 文件大小： | 516K |
| 代理商： | LM2675M-ADJEP |
LM2675EP Series Buck Regulator Design Procedure (Fixed Output)
(Continued)
PROCEDURE (Fixed Output Voltage Version)
EXAMPLE (Fixed Output Voltage Version)
The capacitor list contains through-hole electrolytic capacitors
from four different capacitor manufacturers and surface mount
tantalum capacitors from two different capacitor manufacturers.
It is recommended that both the manufacturers and the
manufacturer’s series that are listed in the table be used. A
table listing the manufacturers’ phone numbers is located in
Surface Mount:
68 F/10V
Sprague 594D Series.
100 F/10V
AVX TPS Series.
Through Hole:
68 F/10V
Sanyo OS-CON SA Series.
220 F/35V
Sanyo MV-GX Series.
220 F/35V
Nichicon PL Series.
220 F/35V
Panasonic HFQ Series.
3. Catch Diode Selection (D1)
A. In normal operation, the average current of the catch diode is
the load current times the catch diode duty cycle, 1-D (D is the
switch duty cycle, which is approximately the output voltage
divided by the input voltage). The largest value of the catch
diode average current occurs at the maximum load current and
maximum input voltage (minimum D). For normal operation, the
catch diode current rating must be at least 1.3 times greater
than its maximum average current. However, if the power supply
design must withstand a continuous output short, the diode
should have a current rating equal to the maximum current limit
of the LM2675EP. The most stressful condition for this diode is
a shorted output condition.
3. Catch Diode Selection (D1)
A. Refer to the table shown in Figure 12. In this example, a 1A,
20V Schottky diode will provide the best performance. If the
circuit must withstand a continuous shorted output, a higher
current Schottky diode is recommended.
B. The reverse voltage rating of the diode should be at least
1.25 times the maximum input voltage.
C. Because of their fast switching speed and low forward
voltage drop, Schottky diodes provide the best performance and
efficiency. This Schottky diode must be located close to the
LM2675EP using short leads and short printed circuit traces.
4. Input Capacitor (C
IN)
4. Input Capacitor (C
IN)
LM2675EP
Enhanced
Plastic
www.national.com
11
相关PDF资料 |
PDF描述 |
|---|---|
| LM2675LD-12EP | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, DSO8 |
| LM2675MX-5.0EP | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
| LM2675LD-3.3EP | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, DSO8 |
| LM2675N-ADJEP | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDIP8 |
| LM2675M-5.0X | 2.2 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2675MX-12 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2675MX-12/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2675MX-3.3 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2675MX-3.3/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2675MX-33 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LM2675 SIMPLE SWITCHER?? Power Converter High Efficiency 1A Step-Down Voltage Regulator |
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