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參數(shù)資料
| 型號： | NCP303LSN41T1 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | SC-59, TSOT-23, TSOP-5 |
| 文件頁數(shù)： | 15/28頁 |
| 文件大小： | 199K |
| 代理商： | NCP303LSN41T1 |
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NCP302, NCP303
http://onsemi.com
22
Figure 46. MultiRail Supply Undervoltage Monitor with Power Good
*
R1 is Optional CD Pin Pullup
3.3 V Power Supply 2
(I/O Subsystem)
VIN
0 V
VTCD
CD Pin
Note: VTCD 0.675 * VIN
tD2
2
1
5
3
Reset Output
Input
CD
GND
NCP302L
Series
2
1
3
Reset Output
Input
GND
2
1
3
Reset Output
Input
GND
NCP301
LSN30T1
NCP301
LSN45T1
CD
5.0 V Power Supply 3
(Peripheral Subsystem)
Power Supply 1
(System Core)
R1
RP
*Required for
NCP303
To MCU or
Logic Circuitry
0 V
tD2
Power Supply 1
Power Supply 2
VP
Power Supply 3
NCP302L
RESET Output
This circuit monitors multiple power supply rails for
undervoltage conditions. If any of the three power supplies
are in an undervoltage condition, the NCP302 reset output
will be immediately set to an active low level. All three
power supplies must be above their minimum voltage levels
for the NCP302 reset output to generate a “Power Good”
level (Reset Output = Power Supply 1 or VP).
Optionally, R1 may be added to provide a smaller
effective
CD pin pullup resistance, (RD’), where
RD’ = R1 || RD, with RD (internal CD pin pullup resistance)
approximately equal to 1.0 M
W, and R1 > 5 kW. If R1 << RD,
then R1 also can decrease the reset output delay time (tD2)
variance over the operating temperature range.
The Power Good signal time delay (tD2) can be estimated
by: tD2
≈ RD * CD, with RD in Ohms, and CD in Farads. If
R1 is installed, then RD’ is substituted for RD. RP is added
only if using the NCP303 to replace the NCP302. This
allows the Reset Output to be pulled up to VP, which can be
the Power Supply 1 or an independent power supply rail.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| NCP303LSN42T1 | 功能描述:電壓監(jiān)測器/監(jiān)控器 4.2V Detector RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風格:SMD/SMT |
| NCP303LSN42T1G | 功能描述:電壓監(jiān)測器/監(jiān)控器 4.2V Detector w/Reset Low RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風格:SMD/SMT |
| NCP303LSN43T1 | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:ON Semiconductor 功能描述: |
| NCP303LSN44T1 | 功能描述:電壓監(jiān)測器/監(jiān)控器 4.4V Detector RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風格:SMD/SMT |
| NCP303LSN44T1G | 功能描述:電壓監(jiān)測器/監(jiān)控器 4.4V Detector w/Reset Low RoHS:否 制造商:Texas Instruments 監(jiān)測電壓數(shù):2 監(jiān)測電壓:Adjustable 輸出類型:Open Drain 欠電壓閾值: 過電壓閾值: 準確性:1 % 工作電源電壓:1.5 V to 6.5 V 工作電源電流:1.8 uA 最大工作溫度:+ 125 C 封裝 / 箱體:SON-6 安裝風格:SMD/SMT |
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