參數(shù)資料
型號: L4937NPD
廠商: 意法半導(dǎo)體
英文描述: Dual 5V Multifunction Voltage Regulator(雙5V多功能電壓穩(wěn)壓器)
中文描述: 雙5V的多功能穩(wěn)壓器(雙5V的多功能電壓穩(wěn)壓器)
文件頁數(shù): 6/9頁
文件大?。?/td> 78K
代理商: L4937NPD
Figure2 :
QuiescentCurrent vs. SupplyVoltage.
Figure3 :
ProgrammableOutput2 Voltagewith ExternalResistors.
400
μ
200
μ
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 externalcapacitorC
T
:
C
T
x 2V
2
μ
A
t
RD
=
Thereactiontimeof theresetcircuitdependsonthe
discharge time limitation of the reset capacitor C
T
and is proportionalto thevalueof C
T
.
The reaction time of the reset circuit increasesthe
noiseimmunity.In fact,if thestandbyoutputvoltage
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 longerthan 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.
L4937NPD
6/9
相關(guān)PDF資料
PDF描述
L4937 DUAL MULTIFUNCTION VOLTAGE REGULATOR
L4937N DUAL MULTIFUNCTION VOLTAGE REGULATOR
L4938E ADVANCED VOLTAGE REGULATOR
L4938ED ADVANCED VOLTAGE REGULATOR
L4938EPD ADVANCED VOLTAGE REGULATOR
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