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LTC3878IGN#PBF PDF预览

LTC3878IGN#PBF

更新时间: 2024-01-01 06:00:21
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
26页 395K
描述
LTC3878 - Fast, Wide Operating Range No RSENSE Step-Down DC/DC Controller; Package: SSOP; Pins: 16; Temperature Range: -40°C to 85°C

LTC3878IGN#PBF 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:SSOP包装说明:SSOP, SSOP16,.25
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:3.56其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 34.2V
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
控制技术:PULSE FREQUENCY MODULATION最大输入电压:38 V
最小输入电压:4 V标称输入电压:15 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e3
长度:4.8895 mm湿度敏感等级:1
功能数量:1端子数量:16
最高工作温度:85 °C最低工作温度:-40 °C
标称输出电压:5.3 V封装主体材料:PLASTIC/EPOXY
封装代码:SSOP封装等效代码:SSOP16,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.75 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:PUSH-PULL
技术:CMOS温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.635 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3.899 mm
Base Number Matches:1

LTC3878IGN#PBF 数据手册

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LTC3878  
Fast,Wide Operating Range  
No R  
Step-Down  
SENSE  
DC/DC Controller  
DescripTion  
FeaTures  
Theꢀ LTC®3878ꢀ isꢀ aꢀ synchronousꢀ step-downꢀ switchingꢀ  
DC/DCꢀcontrollerꢀoptimizedꢀforꢀhighꢀswitchingꢀfrequencyꢀ  
andꢀfastꢀtransientꢀresponse.ꢀTheꢀconstantꢀon-timeꢀvalleyꢀ  
currentꢀmodeꢀarchitectureꢀallowsꢀforꢀaꢀwideꢀinputꢀrange,ꢀ  
includingverylowdutyfactoroperation.Noexternalsenseꢀ  
resistorꢀorꢀslopeꢀcompensationꢀisꢀrequired.ꢀTheꢀLTC3878ꢀ  
isꢀpinꢀcompatibleꢀwithꢀtheꢀLTC1778ꢀinꢀapplicationsꢀthatꢀdoꢀ  
n
ꢀ WideꢀV ꢀRange:ꢀ4Vꢀtoꢀ38Vꢀ  
IN  
n
n
n
n
n
n
n
n
n
n
n
n
n
n
ꢀ ±±1ꢀ0.8VꢀVoltageꢀReference  
ExtremelyꢀFastꢀTransientꢀResponse  
t  
NoꢀR  
:ꢀ43nsꢀꢀ  
ON(MIN)  
™ꢀValleyꢀCurrentꢀModeꢀControl  
SENSE  
StableꢀwithꢀLowꢀESRꢀCeramicꢀC  
OUT  
SupportsꢀSmoothꢀStart-UpꢀIntoꢀPre-BiasedꢀOutput  
OptimizedꢀforꢀHighꢀStep-DownꢀRatios  
notꢀuseꢀEXTV whileꢀofferingꢀbetterꢀefficiency.ꢀConsultꢀ  
CCꢀ  
withꢀtheꢀfactoryꢀtoꢀverifyꢀcompatibility.  
PinCompatibleꢀwithꢀtheLTC±778ꢀ(NoꢀEXTV ꢀPin)  
CC  
ꢀ PowerꢀGoodꢀOutputꢀVoltageꢀMonitor  
ꢀ DualꢀN-ChannelꢀMOSFETꢀSynchronousꢀDrive  
ꢀ AdjustableꢀSwitchingꢀFrequency  
Operatingfrequencyissetbyanexternalresistorandꢀ  
compensatedꢀforꢀvariationsꢀinꢀV ꢀtoꢀofferꢀexcellentꢀlineꢀ  
IN  
stability.ꢀ Discontinuousꢀ modeꢀ operationꢀ providesꢀ highꢀ  
efficiencyꢀduringꢀlightꢀloadꢀconditions.ꢀAꢀforcedꢀcontinu-  
ousꢀcontrolꢀpinꢀallowsꢀtheꢀuserꢀtoꢀreduceꢀnoiseꢀandꢀRFꢀ  
interference.ꢀSafetyꢀfeaturesꢀincludeꢀoutputꢀovervoltageꢀ  
protectionꢀandꢀprogrammableꢀcurrentꢀlimitꢀwithꢀfoldback.ꢀ  
Soft-startcapabilityforsupplysequencingisaccomplishedꢀ  
throughꢀanꢀexternalꢀtimingꢀcapacitor.ꢀTheꢀcurrentꢀlimitꢀisꢀ  
userꢀprogrammable.  
ꢀ ProgrammableꢀCurrentꢀLimitꢀwithꢀFoldback  
ꢀ OutputꢀOvervoltageꢀProtection  
ꢀ Smallꢀ16-PinꢀNarrowꢀSSOPꢀPackage  
applicaTions  
n
ꢀ DistributedꢀPowerꢀSystems  
n
ꢀ EmbeddedꢀComputing  
n
ꢀ CommunicationsꢀInfrastructure  
TheꢀLTC3878ꢀallowsꢀoperationꢀfromꢀ4Vꢀtoꢀ38Vꢀatꢀtheꢀinputꢀ  
L,ꢀLT,LTC,ꢀLTM,ꢀLinearꢀTechnologyꢀandꢀtheꢀLinearꢀlogoꢀareꢀregisteredꢀtrademarksꢀofꢀLinearꢀ  
andꢀfromꢀ0.8Vꢀtoꢀ90%ꢀV ꢀatꢀtheꢀoutput.ꢀTheꢀLTC3878ꢀisꢀ  
IN  
TechnologyꢀCorporation.ꢀNoꢀR  
ꢀisꢀaꢀtrademarkꢀofꢀLinearꢀTechnologyꢀCorporation.ꢀꢀ  
SENSE  
Allꢀotherꢀtrademarksꢀareꢀtheꢀpropertyꢀofꢀtheirꢀrespectiveꢀowners.ꢀꢀ  
availableꢀinꢀaꢀsmallꢀ16-pinꢀnarrowꢀSSOPꢀpackage.  
ProtectedꢀbyꢀU.S.ꢀPatents,ꢀincludingꢀ5481178,ꢀ6100678,ꢀ6580258,ꢀ5847554,ꢀ6304066.  
Typical applicaTion  
EfficiencyꢀvsꢀLoadꢀCurrent  
HighꢀEfficiencyꢀStep-DownꢀConverter  
100  
432k  
DISCONTINUOUS  
90  
0.1µF  
I
ON  
MODE  
V
IN  
80  
RUN/SS  
V
IN  
4.5V TO 28V  
220pF  
RJK0305  
0.56µH  
TG  
70  
10µF  
12.1k  
LTC3878  
CONTINUOUS  
60  
I
TH  
SW  
V
1.2V  
15A  
OUT  
MODE  
SGND BOOST  
FCB  
50  
0.22µF  
40  
30  
INTV  
CC  
330µF  
s2  
RJK0330  
BG  
4.7µF  
V
V
= 12V  
IN  
OUT  
20  
10  
0
= 1.2V  
PGND  
PGOOD  
SW FREQ = 400kHz  
FIGURE 7 CIRCUIT  
V
5.11k  
10k  
RNG  
V
FB  
0.01  
0.1  
1
10  
100  
LOAD CURRENT (A)  
3878 G07  
3878 TA01a  
3878fa  

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