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參數(shù)資料
| 型號： | LM9072S |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Dual Tracking Low-Dropout System Regulator |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PSSO9 |
| 封裝： | POWER, TO-263, 9 PIN |
| 文件頁數(shù)： | 10/15頁 |
| 文件大?。?/td> | 477K |
| 代理商： | LM9072S |
Application Information
(Continued)
Safety Latch-OFF
To address a system FMEA (Failure Mode Effects Analysis)
issue the Keep-Alive high level should be derived from the
Tracking output regulator as shown in Figure 6 The issue
stems from the “what-if” scenario whereby the system is in
the Keep-Alive state and there is a short to ground on the
Tracking Output regulator. If this output is powering remote
sensors or systems, this becomes a more highly possible
fault condition. Since a short on the Tracking output does not
affect the Main output, which, if used to provide the
Keep-Alive input signal, would remain ON and draw 120 mA,
the short circuit current of the Tracking regulator, from the in-
put supply.
Using the Tracking output supply for Keep-Alive would pre-
vent Keep-Alive operation during a short to ground fault and
the excessive drain on the input supply. The inversion by the
transistor will require a low level from the controller to allow
Keep-Alive operation. The 24 k
pull-up resistor provides
current limiting in the event of a Tracking output short to the
unregulated/battery input supply.
DS012906-21
FIGURE 5. Simple Logic Configuration to Provide ON/OFF Sensing
L
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| 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(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.28V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應(yīng)商設(shè)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 |
| LM9073SX | 功能描述:IC REG LDO 5V .7A/.1A TO-263-11 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.28V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應(yīng)商設(shè)備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
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