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參數(shù)資料
| 型號： | L4936N |
| 廠商： | 意法半導體 |
| 英文描述： | DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| 中文描述： | 多功能雙電壓調節(jié)器 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大小： | 87K |
| 代理商： | L4936N |
RESETCIRCUIT
Theblockcircuitdiagramoftheresetcircuitisshown
infig.4.Theresetcircuitsupervisesthestandbyout-
put voltage. The reset threshold of 4.7V is defined
by the internal reference voltage and the standby
outputdivider.
The reset pulse delay time t
RD
, is defined by the
chargetime of an externalcapacitor C
T
:
C
T
x2V
t
RD
=
2
μ
A
Thereactiontimeoftheresetcircuitdependsonthe
discharge time limitation of the reset capacitor C
T
and is proportionalto the valueof C
T
.
The reaction time of the reset circuit increases the
noiseimmunity.Infact,ifthestandbyoutputvoltage
drops below the reset threshold for a time shorter
thanthe reactiontime t
RR
, no resetoutputvariation
occurs. The nominal reset delay is generated for
standbyoutput voltage drops longer than the time
necessary for the complete discharging of the ca-
pacitorC
T
. This time is typically equal to 50
μ
s if
C
T
=100nF.Thetypicalresetoutputwaveformsare
shownin fig. 5.
SENSECOMPARATOR
Thiscircuitcomparesaninputsignalwithaninternal
voltagereference of typically 1.23V.The use of an
externalvoltagedividermakesthecomparatorvery
flexibleintheapplication.Thisfunctioncanbe used
to supervisetheinputvoltage-eitherbeforeor after
theprotectiondiode- andtogiveadditionalinforma-
tiontothemicroprocessorsuchaslowvoltagewarn-
ings.
Figure4 :
Block Diagram of the ResetCircuit.
L4936N/NH
7/11
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PDF描述 |
|---|---|
| L4936NH | DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| L4937NPD | Dual 5V Multifunction Voltage Regulator(雙5V多功能電壓穩(wěn)壓器) |
| L4937 | DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| L4937N | DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| L4938E | ADVANCED VOLTAGE REGULATOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L4936NH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| L4937 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DUAL MULTIFUNCTION VOLTAGE REGULATOR |
| L4937N | 功能描述:線性穩(wěn)壓器 - 標準 Dual 5V Very LDO RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調節(jié): 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| L4937NL | 功能描述:線性穩(wěn)壓器 - 標準 Dual 5V Very LDO RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調節(jié): 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| L4937NPD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:DUAL 5V MULTIFUNCTION VOLTAGE REGULATOR |
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