- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄45 > NCP1501DMR2G (ON Semiconductor)IC REG SGL BUCK/LINEAR 8MICRO Datasheet資料下載
參數(shù)資料
| 型號： | NCP1501DMR2G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 5/14頁 |
| 文件大小： | 359K |
| 描述： | IC REG SGL BUCK/LINEAR 8MICRO |
| 產(chǎn)品變化通告： | Product Obsolescence 01/Jul/2009 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 拓?fù)洌?/td> | 降壓（降壓）（1），線性（LDO）（1） |
| 功能： | 任何功能 |
| 輸出數(shù)： | 1 |
| 頻率 - 開關(guān)： | 500kHz ~ 1MHz |
| 電壓/電流 - 輸出 1： | 1.05V，1.35V，1.57V，1.8V，- |
| 帶 LED 驅(qū)動器： | 無 |
| 帶監(jiān)控器： | 無 |
| 帶序列發(fā)生器： | 無 |
| 電源電壓： | 2.7 V ~ 5.2 V |
| 工作溫度： | -30°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | Micro8? |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | NCP1501DMR2GOSCT |
NCP1501
http://onsemi.com
5
DETAILEDOPERATINGDESCRIPTION
The Buck regulator is a synchronous rectifier PWM
regulatorwithintegratedMOSFETs.Thisregulatorhasan
LDOfunctionforlowpowermodestoconservepowerand
lower ripple voltage associated with PFM mode. The
NCP1501 does not containan internaloscillator for the
switchingmode.TheDualPWM/LDOmodeisanexclusive
PatentPendingcircuit.
ThePWMclockisgeneratedviaanexternalclocksignal
ontheSynchronizationpin.Theoperatingfrequencyrange
forthePWMis500kHzto1000kHz.Theoutputcurrentof
the PWMistypically100mAwitha guarantee ofover
300mAforthe2.7to5.2inputvoltagerange.
Ifasynchronizationpulseisnotpresent,theNCP1501
changesintotheLDOmode.TheLDOfunctionassuresthe
userofanextremelylowoutputripplevoltageandgreatly
reducedquiescentcurrentwhentheuserssystemisinasleep
mode.InternallytotheNCP1501,theSynchronizationpin
hasapulldownresistortoforcethepartintoLDOmode
whenaclocksignalisnotpresent.ToplacetheNCP1501in
LDOmode,theusermustsettheSynchronizationpinlow.
TheLDOmodeguaranteesanoutputinexcessof50mA.
PinsCB0andCB1controltheoutputvoltageselection.
Thefourvoltagesare1.05V,1.35V,1.57V,1.8V.CB0
containsapulldownresistorandCB1containsapullup
resistorinternaltotheNCP1501.Theresistorsforcethe
outputoftheconverterto1.35Vifthepinsarefloating
connectionstotheexternalcircuit.
TheShutdownPinenablestheoperationofthedevice.
TheShutdownPinhasaninternalpulldownresistortoforce
theNCP1501intotheoffmodeifthispinisfloatingdueto
theexternalcircuit.DuringStartup,theNCP1501hasasoft
startfunctiontolimitfastdV/dtandeliminateovershooton
theoutput.
Figure3.BlockDiagramandCircuitSchematicoftheNCP1501
L1
V
bat
Sync
SHD
C
in
10m
DC/DC
CONTROL
LDO
CONTROL
Q2
EA
CB0
CB1
10mH
LX
FB
V
out
C
out
10m
I
lim
Q1
Q3
Theexternalcomponentsrequiredareaninputandan
output100mFceramiccapacitoranda10mHinductor.
PWMMode
Duringnormaloperation,asynchronizationpulseactsas
theclockfortheDC/DCcontroller.Therisingedgeofthe
clockpullsthegateofQ1lowallowingthe inductorto
charge.WhenthecurrentthroughQ1reacheseitherthe
currentlimitorfeedbackvoltagereachesitslimit,Q1will
turnoffandQ2willturnon.Q2replacesthefreewheeling
diodetypicallyassociatedwithBuckConverters.Q2will
turnoffwheneitherarisingedgesyncpulseispresentorall
thestoredenergyisdepletedfromtheinductor.Q3remains
offduringthismode.
TheoutputvoltageaccuracyinthePWMmodeiswell
within 3% of the nominal set value. An over voltage
protectioncircuitispresentinthePWMmodetolimitthe
positivevoltagespikeduetofastloadtransientconditions.
ThePWMalsohastheabilitytogoto100%dutycyclefor
transient conditions and low input to output voltage
differentials.
InPWMmode,eachswitchingcyclehasaguaranteed
on--timeof100ns.TheNCP1501hastwoprotectioncircuits
thatcaneliminatethecycle.Whentripped,theovervoltage
protectionorthethermalshutdownoverridesthegatedrive
ofthehighsideMOSFET.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCP1578MNR2G | IC REG DL BCK/LINEAR SYNC 20-QFN |
| NCP1601BDR2G | IC PFC CTRL CRM/TRANSITION 8SOIC |
| NCP1603D100R2G | IC CTLR PFC/PWM COMBO 16-SOIC |
| NCP1605DR2G | IC PFC CONTROLLER CCM/DCM 16SOIC |
| NCP1606BDR2G | IC POWER FACTOR CONTROLLER 8SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1508MNR2 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1508MNR2G | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1509MNR2 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1509MNR2G | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1510AFCT1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。