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參數(shù)資料
| 型號： | LM5005 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High Voltage 2.5 Amp Buck Regulator |
| 中文描述： | 高電壓2.5安培降壓穩(wěn)壓器 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大?。?/td> | 774K |
| 代理商： | LM5005 |
Application Information
(Continued)
from the COMP pin to the AGND pin. When using this
method the value of the capacitor should not exceed 100pF.
BIAS POWER DISSIPATION REDUCTION
Buck regulators operating with high input voltage can dissi-
pate an appreciable amount of power for the bias of the IC.
The V
regulator must step-down the input voltage V
to a
nominal V
level of 7V. The large voltage drop across the
V
CC
regulator translates into a large power dissipation within
the Vcc regulator. There are several techniques that can
significantly reduce this bias regulator power dissipation.
Figures 11 and 12 depict two methods to bias the IC from the
output voltage. In each case the internal Vcc regulator is
used to initially bias the VCC pin. After the output voltage is
established, the VCC pin potential is raised above the nomi-
nal 7V regulation level, which effectively disables the internal
V
CC
regulator. The voltage applied to the VCC pin should
never exceed 14V. The V
CC
voltage should never be larger
than the V
IN
voltage.
20161918
FIGURE 11. VCC Bias from VOUT for 8V
<
VOUT
<
14V
20161919
FIGURE 12. VCC Bias with Additional Winding on the Output Inductor
L
www.national.com
18
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| LM5005MH | High Voltage 2.5 Amp Buck Regulator |
| LM5005MHX | High Voltage 2.5 Amp Buck Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM5005_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Voltage 2.5 Amp Buck Regulator |
| LM5005EVAL | 功能描述:電源管理IC開發(fā)工具 LM5005 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM5005EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM5005 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LM5005MH | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM5005MH/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2.5A Integrated Buck Regulator 75V RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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