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參數(shù)資料
| 型號(hào)： | L4946B |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Quad Voltage Regulator with Inhibit and Reset(帶禁止和復(fù)位的四電壓穩(wěn)壓器) |
| 中文描述： | 四電壓調(diào)節(jié)器的抑制和復(fù)位（帶禁止和復(fù)位的四電壓穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 6/9頁(yè) |
| 文件大小： | 104K |
| 代理商： | L4946B |
FUNCTIONAL DESCRIPTION
The L4946 includes a monitoring circuit to warn
the microprocessor if a low voltage or no voltage
conditionis occurring. Between 7V and 8V on the
STCAP pin, the LVW output will go low. This tells
the microprocessor to stop executing code and
save vital information. The reset output will go low
when V
04
drops 0.15V below it’s typical reading.
A reset will occur between a minimum of 4.5 and
a maximum of 5V on V
04
. The reset output will go
low when V
04
drops 0.15 below it’s typical value.
A reset will occur between a minimum of 4.5V
and a maximum of 5V on V
04
. When the V
04
drops between 4.5 and 5V
goes low. It is very important that the RESET out-
put doesn’t go above 0.75V until the V
04
output
has gone back above 4.75V (typical). The micro-
processor looks for a rising edge. So, any spike
will tell the microprocessor to start operating.
Once the STCAP line passes 7.5V (typical), the
LVW output will also return to high state.
the RESET output
TIMING DIAGRAM
Graphsof the Output Curves for V
O1,2,3 and 4
5.0
5.0
7.5
7.5
150
μ
s
100
μ
s
150
μ
s
100
μ
s
L4946
6/9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L4946 | Quad Voltage Regulator with Inhibit and Reset(帶禁止和復(fù)位的四電壓穩(wěn)壓器) |
| L4947PD | 5V-0.5A Very Low Drop Regulator with Reset(帶復(fù)位低壓差穩(wěn)壓器) |
| L4947 | Very Low Drop Voltage Regulator with Reset(帶復(fù)位的低壓差穩(wěn)壓器) |
| L4948 | Quad Voltage Regulator with Inhabit and Reset(帶禁止和復(fù)位的四通道穩(wěn)壓器) |
| L4949E | Multifunction Very Low Drop Voltage Regulator(多功能低壓差電壓穩(wěn)壓器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4946SQ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Output Capacitor-Less Audio Subsystem with Programmable National 3D |
| L4947 | 功能描述:低壓差穩(wěn)壓器 - LDO 5.0 Volt 0.5 Amp RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4947H | 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 0.5A Positive RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4947L | 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 0.5A Positive RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4947PD | 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 0.5A Positive RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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