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參數資料
| 型號： | LM9072 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Dual Tracking Low-Dropout System Regulator |
| 中文描述： | 雙跟蹤低壓差穩壓器系統 |
| 文件頁數： | 12/15頁 |
| 文件大小： | 477K |
| 代理商： | LM9072 |
Application Information
(Continued)
Thermal Management
The LM9072 is packaged in both a TO-263 surface mount
power package and a narrow lead-pitch TO-220 package. To
obtain operation over the highest possible load current and
input voltage ranges, care must be taken to control the oper-
ating temperature of the device. Thermal shutdown protec-
tion is built in with a threshold above 150C. Conventional
heat sinking techniques can be used with the TO-220 pack-
age. When applying the TO-263 package on-board heat
sinking is important to prevent shut down. More copper foil
area under the tab of the device will directly reduce the oper-
ating junction temperature. Use of a double sided board with
vias between two planes of copper as shown in Figure 8 will
improve performance and can optimize the PC board sur-
face area required.
Electro-Magnetic Compatibility (EMC)
The LM9072 offers good immunity to high frequency interfer-
ence in a standard Bulk Current Injection (BCI) test
(ISO11452 Part 4 test method). The following test conditions
and configuration (Figure 9) can be used to observe this per-
formance.
Frequency Range
Modulation 1
Modulation 2
Dwell Time
Frequency Steps
1 MHz to 400 MHz
CW (no modulation)
1 kHz sine wave, 80% AM
1 second
1 MHz (from 1 MHz to 10 MHz)
2 MHz (from 10 MHz to 200 MHz)
20 MHz (from 200 MHz to 400 MHz)
Closed loop current probe
Test Method
In this test configuration the current injected into either the
input pin or the tracking output pin is increased until a reset
output is generated. These two pins are the most critical as
they typically will connect to a module through long lengths
of wire most likely to pick up high frequency energy. Figure
10 illustrates examples of test results on the LM9072 with
both types of modulation.
These results are just examples as actual results in any
given application will depend on numerous external factors
such as component selection, pc board layout, etc. The cur-
rent power of the injected signal is expressed in dB relative
to 1 mA (i.e., 40 dBmA = 100 mA).
DS012906-24
FIGURE 8. Typical TO-263 PC Board Heatsinking
L
www.national.com
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相關代理商/技術參數 |
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| LM9072S | 功能描述:IC REG LDO 5V .35A/80MA TO-263-9 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 線性 系列:- 標準包裝:1 系列:- 穩壓器拓撲結構:正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.28V @ 150mA 穩壓器數量:1 電流 - 輸出:150mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應商設備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LM9072SX | 功能描述:IC REG LDO 5V .35A/80MA TO-263-9 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 線性 系列:- 標準包裝:1 系列:- 穩壓器拓撲結構:正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.28V @ 150mA 穩壓器數量:1 電流 - 輸出:150mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應商設備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LM9072T | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Tracking Low-Dropout System Regulator |
| LM9073 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual High Current Low-Dropout System Regulator |
| LM9073S | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual High Current Low-Dropout System Regulator |
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