- 您现在的位置：买卖IC网 > Datasheet目录45 > NCP1501DMR2G (ON Semiconductor)IC REG SGL BUCK/LINEAR 8MICRO Datasheet资料下载
参数资料
| 型号： | NCP1501DMR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 5/14页 |
| 文件大小： | 359K |
| 描述： | IC REG SGL BUCK/LINEAR 8MICRO |
| 产品变化通告： | Product Obsolescence 01/Jul/2009 |
| 标准包装： | 1 |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 1 |
| 频率 - 开关： | 500kHz ~ 1MHz |
| 电压/电流 - 输出 1： | 1.05V，1.35V，1.57V，1.8V，- |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 无 |
| 电源电压： | 2.7 V ~ 5.2 V |
| 工作温度： | -30°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | Micro8? |
| 包装： | 剪切带 (CT) |
| 其它名称： | 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.
相关PDF资料 |
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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1508MNR2 | 功能描述:直流/直流开关转换器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1508MNR2G | 功能描述:直流/直流开关转换器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1509MNR2 | 功能描述:直流/直流开关转换器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1509MNR2G | 功能描述:直流/直流开关转换器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCP1510AFCT1 | 功能描述:直流/直流开关转换器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。