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參數(shù)資料
| 型號： | LM9073S |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Dual High Current Low-Dropout System Regulator |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PSSO11 |
| 封裝： | TO-263, 11 PIN |
| 文件頁數(shù)： | 13/18頁 |
| 文件大小： | 718K |
| 代理商： | LM9073S |
Application Information
(Continued)
To initiate the Keep-Alive routine before actual power down,
it is important for the system controller to know when the sys-
tem has been switched OFF. To eliminate any interface be-
tween the controller and the ON/OFF switch and potentially
noisy unregulated input supply, and simple logic scheme
shown in Figure 6 can be used. With this circuitry the Reset
output form the LM9073 provides the ON/OFF sensing input
to the controller.
When switched OFF, the main regulator output will fall out of
regulation and generate a low logic level on the Reset out-
put. This input to the controller provides the switch OFF indi-
cation and initiates the Keep-Alive interval.
Control of the Keep-Alive duration is set by a logic 1 on the
Keep-Alive output line from the system controller. This high
level prevents the Reset output from resetting the entire sys-
tem and also gates the Keep-Alive input signal to the
LM9073. The inverted Reset signal provides a logic 1 to the
Keep-Alive input of the LM9073.
The Main output will only drop out of regulation for a very
short time before the Keep-Alive input turns it back on.
The Reset output remains low for the delay time interval.
When it turns high the Main output switches OFF and back
ON again very quickly. This continues until the system con-
troller takes the Keep-Alive output line to a logic low level.
Figure 5. Basic Keep-Alive Operation
DS101296-20
L
www.national.com
13
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| 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 |
| LM9073T | 制造商:Rochester Electronics LLC 功能描述:5V DUAL OUTPUT TRACKING REGL - Bulk |
| LM9073T/NOPB | 功能描述:IC REG LDO 5V .7A/.1A TO-220-11 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(yīng)商設(shè)備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LM9074 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:System Voltage Regulator with Keep-Alive ON/OFF |
| LM9074EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Enhanced Plastic System Voltage Regulator with Keep-Alive ON/OFF Control |
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