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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)： | 9/28頁 |
| 文件大?。?/td> | 199K |
| 代理商： | NCP303LSN41T1 |
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NCP302, NCP303
http://onsemi.com
17
OPERATING DESCRIPTION
The NCP302 and NCP303 series devices consist of a
precision voltage detector that drives a time delay generator.
application. Initially consider that input voltage Vin is at a
nominal level and it is greater than the voltage detector upper
threshold (VDET+). The voltage at Pin 5 and capacitor CD
will be at the same level as Vin, and the reset output (Pin 1)
will be in the high state for active low devices, or in the low
state for active high devices. If there is a power interruption
and Vin becomes significantly deficient, it will fall below the
lower detector threshold (VDET) and the external time
delay capacitor CD will be immediately discharged by an
internal NChannel MOSFET that connects to Pin 5. This
sequence of events causes the Reset output to be in the low
state for active low devices, or in the high state for active
high devices. After completion of the power interruption,
Vin will again return to its nominal level and become greater
than the VDET+. The voltage detector will turn off the
NChannel MOSFET and allow pullup resistor RD to charge
external capacitor CD, thus creating a programmable delay
for releasing the reset signal. When the voltage at Pin 5
exceeds the inverter/buffer threshold, typically 0.675 Vin,
the reset output will revert back to its original state. The reset
output time delay versus capacitance is shown in Figures 12
through 14. The voltage detector and inverter/buffer have
builtin hysteresis to prevent erratic reset operation.
Although these device series are specifically designed for
use as reset controllers in portable microprocessor based
systems, they offer a costeffective solution in numerous
applications where precise voltage monitoring and time
application examples.
Figure 37. Timing Waveforms
tD2
Vin
VDET+
VDET
Input Voltage, Pin 2
Capacitor, Pin 5
Vin
0 V
Reset Output (Active Low), Pin 1
Vin
Reset Output (Active High), Pin 1
Vin
0 V
0.675 Vin
VDET
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相關(guān)代理商/技術(shù)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(zhǔn)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(fēng)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(zhǔn)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(fēng)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(zhǔn)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(fēng)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(zhǔn)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(fēng)格:SMD/SMT |
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