什么的力量500z(一)
团结的力量作文 500字
听着外面鸟的叫声,想着那故事情节我的心情久久不能平静。深受感到团结就是力量。
这个故事讲了几个猎人把一群斑羚逼到了伤心崖上,虽然斑羚羊是跳远健将,但是这远度比羚羊们跳远极限要多出1~2米,斑羚们想尽办法最后先让一个老羊和一个年轻羊(小羊)同时起跳,老羊跳在年轻羊的下面,年轻羊快落下去时用老羊当跳板在起跳,老羊掉下了悬崖年轻羊安全过岸的方法。一半羊安全过了山崖。
团结的力量真是强大,他们原本全部葬身的,现在它们团结起来救活了一半,我真是佩服之极呀!如果只有一个羊能跳过吗?要是有两个羊它们都想过去能过去吗?连着动物都会团结,我们人类呢?是不是一定要团结呢,要不怎能成为高级动物呢?这些动物真是“一个篱笆三个桩,一个好汉三个帮呀!”
是呀在我们生活当中也有很多向它们的示例:一个小棍你能很容易的把他掰断,但是十个小棍你就不一定掰断了,遇到一个难题一个人可能要1个小时才能想出来,但是两个半个小时就能想出来,四个人需要十五分钟,六个人只需十分钟......要是其它的国家来攻我们的家,一个人能阻止吗?一个城市的人能阻止吗?只有一个国家的人团结起来,才能把敌人赶跑。
团结的力量真是强大,那么让我来们团结起来吧!这样我们美丽的社会才能充满力量,这样我们的难题才能解决呀!
什么的力量500z(二)
元器件交易网
ZSRSERIES
LOCAL VOLTAGE REGULATOR
DEVICE DESCRIPTION
TheZSRSeriesthreeterminalfixedpositivevoltageregulatorsfeatureinternalcircuitcurrentlimitandthermalshutdownmakingthedevicesdifficulttodestroy.Thecircuitdesignallowscreationofanycustomvoltageintherange2.85to12volts.Thedevicesareavailableinasmalloutlinesurfacemountpackage,idealforapplicationswherespacesavingisimportant,aswellasthroughholeTO92stylepackaging.Thedevicesaresuitedtolocalvoltageregulationapplications,whereproblemscouldbeencounteredwithdistributedsinglesourceregulation,aswellasmoregeneralvoltageregulationapplications.
TheZSRSeriesshowperformancecharacteristicssuperiortootherlocalvoltageregulators.Theinitialoutputvoltageismaintainedtowithin2.5%withaquiescentcurrentoftypically350µA.Outputvoltagechange,withinputvoltageandloadcurrent,ismuchlowerthancompetitivedevices.TheZSRdevicesarecompletely stable with no external components.
FEATURES
•Small outline SO8 and SOT223 package•
TO92 package
•2.85 to 12 Volt
•Output current up to 200mA•Tight initial tolerance•Low quiescent current
•-55 to 125°C temperature range•No external components•Internal thermal shutdown•Internal short circuit current limit
VOLTAGE RANGE
ZSR285ZSR300ZSR330ZSR400ZSR485ZSR500ZSR520ZSR570ZSR600ZSR700ZSR800ZSR850ZSR900ZSR1000ZSR1200
2.85V3.0V3.3V4.0V4.85V5.0V5.2V5.7V6.0V7.0V8.0V8.5V9.0V10.0V12.0V
ISSUE 3 - SEPTEMBER 2001
1
元器件交易网
ZSRSERIES
ABSOLUTE MAXIMUM RATING
Input voltageOutput Current(Io)Operating TemperatureStorage Temperature
20V200mA-55 to 125°C-65 to 150°C
Power Dissipation (Tamb=25°C)SOT2232W(Note 3)TO92S08
600mW780mW(Note 3)
ELECTRICAL CHARACTERISTICS
Notes:
1.The maximum operating input voltage and outputcurrent of the device will be governed by the
maximum power dissipation of the selected package.Maximum package power dissipation is specified at25 °C and must be linearly derated to zero atTamb=125°C.
2.The following data represents pulse test conditionswith junction temperatures as indicated at theinitiation of the test. Continuous operation of thedevices with the stated conditions might exceed thepower dissipation limits of the chosen package.
3.Maximum power dissipation, for the SOT223 andSO8 packages, is calculated assuming that the deviceis mounted on a PCB measuring 2 inches square.4. The shut down feature of the device operates if itstemperature exceeds its design limit as might occurduring external faults, short circuits etc. If the
regulator is supplied from an inductive source then alarge voltage transient, on the regulator input, canresult should the shut down circuit operate. It isadvised that a capacitor (1µF or greater) should beapplied across the regulator input to ensure that themaximum voltage rating of the device is notexceeded under shutdown conditions.
ZSR285TESTCONDITIONS(Unlessotherwisestated):Tj=25°C,IO=100mA,Vin=6.85V
SYMBOLPARAMETER
VO
OutputVoltage
IO=1to200mACONDITIONS
MIN.2.78τ2.736
TYP.2.85
MAX.2.922.9642.964
1052350
4025600100100
75
484.85
IO=5.0mA
τ
0.1
mV/°C
624.55
UNITSVVVmVmVmVµAµAµAµVrmsdBV
Vin=4.85to20V2.736IO=1to100mAτ
∆VO∆VOlq∆lqVn
LineRegulationLoadRegulationQuiescentCurrentQuiescentCurrentChange
OutputNoiseVoltage
V=4.85to20V
in
I=1to200mAO
IO=1to100mAτ
IO=1to200mAVin=4.85to20Vf=10Hzto10kHzVin=5.85to18Vf=120Hz
∆Vin/∆VORippleRejectionVin∆VO/∆T
InputVoltageRequiredToMaintainRegulationAverageTemperatureCoefficientofVO
=Tj=-55 to 125°C
ISSUE 3 - SEPTEMBER 2001
2
元器件交易网
ZSRSERIES
ZSR300 TEST CONDITIONS (Unless otherwise stated):Tj=25°C,IO=100mA,Vin=7V
SYMBOLPARAMETER
VO
OutputVoltage
IO=1to200mAVin=5to20VIO=1to100mA
∆VO∆VOlq∆lqVn
LineRegulationLoadRegulationQuiescentCurrent
V=5to20V
CONDITIONSMIN.2.92τ2.882.88τ
TYP.3.0
MAX.3.083.123.12
UNITSVVVmVmVmVµAµAµAµVrmsdBVmV/°C
1052350
4025600100100
I=1to200mAO
IO=1to100mAτ
QuiescentCurrentChangeIO=1to200mA
Vin=5to20VOutputNoiseVoltage
f=10Hzto10kHzVin=6to18Vf=120Hz
485
IO=5.0mA
τ
0.175624.7
∆Vin/∆VORippleRejectionVin∆VO/∆T
InputVoltageRequiredToMaintainRegulationAverageTemperatureCoefficientofVO
ZSR330 TEST CONDITIONS (Unless otherwise stated):Tj=25°C,IO=100mA,Vin=7.3V
SYMBOLPARAMETER
VO
OutputVoltage
IO=1to200mAτVin=5.3to20VIO=1to100mAτ
∆VO∆VOlq∆lqVn
LineRegulationLoadRegulationQuiescentCurrent
V=5.3to20V
in
CONDITIONSMIN.3.2183.1683.168
TYP.3.3
MAX.3.3823.4323.432
UNITSVVVmVmVmVµAµAµAµVrmsdBVmV/°C
7.552350
3025600100100
I=1to200mAO
IO=1to100mAτ
QuiescentCurrentChangeIO=1to200mA
Vin=5.3to20VOutputNoiseVoltage
f=10Hzto10kHzVin=6.3to18Vf=120Hz
505.3
IO=5.0mAτ
506450.1
∆Vin/∆VORippleRejectionVin∆VO/∆T
InputVoltageRequiredToMaintainRegulationAverageTemperatureCoefficientofVO
=Tj=-55 to 125°C
元器件交易网
ZSRSERIES
ZSR400TESTCONDITIONS(Unlessotherwisestated):T=25°C,I=100mA,V=8V
SYMBOLPARAMETER
VO
OutputVoltage
IO=1to200mAVin=6to20VIO=1to100mA
∆VO∆VOlq∆lqVn
LineRegulationLoadRegulationQuiescentCurrentQuiescentCurrentChange