參數資料
型號： LTC3541EDD-3#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.25 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10
封裝： 3 X 3 MM, PLASTIC, M0-229WEED-2, DFN-10
文件頁數： 18/20頁
文件大?。?/td> 379K
代理商： LTC3541EDD-3#TR
LTC3541-3
35413fc
PI FU CTIO S
U
VIN (Pin 1):MainSupplyPin.Thispinmustbeclosely
decoupledtoGNDwitha10Forgreatercapacitor.
ENBUCK (Pin 2):BuckEnablePin.Thispinenablesthe
buckregulatorwhendriventoalogichigh.
VOUT(Pin3):BuckRegulatorOutputPin.Thispinreceives
thebuckregulator’soutputvoltage.
NC(Pin4):NotConnected.Thispinmustnotbeconnected
orcapacitivelyloaded.
LVOUT (Pin 5):VLDO/LinearRegulatorOutputPin.This
pinprovidestheregulatedoutputvoltagefromtheVLDO
orlinearregulator.
LVIN (Pin 6):VLDO/LinearRegulatorInputSupplyPin.
ThispinprovidestheinputsupplyvoltagefortheVLDO
powerFET.
GND (Pin 7):AnalogGroundPin.
MODE (Pin 8):BuckModeSelectionPin.Thispinenables
buckPulse-Skipoperationwhendriventoalogichigh
andenablesbuckBurstModeoperationwhendrivento
alogiclow.
ENVLDO (Pin 9): VLDO/Linear Regulator Enable Pin.
Whendriventoalogichigh,thispinenablesthelinear
regulatorwhentheENBUCKpinisdriventoalogiclow,
andenablestheVLDOregulatorwhentheENBUCKpinis
driventoalogichigh.
SW (Pin 10): Switch Node Pin. This pin connects the
internalmainandsynchronouspowerMOSFETswitches
totheexternalinductorforthebuckregulator.
Exposed Pad (Pin 11): Ground Pin. This pin must be
solderedtothePCBtoprovidebothelectricalcontactto
groundandgoodthermalcontacttothePCB.
Note:Table1detailsthetruthtableforthecontrolpins
oftheLTC3541-3.
Table 1. LTC3541-3 Control Truth Table
PIN NAME
OPERATIONAL DESCRIPTION
ENBUCK ENVLDO MODE
0
X
LTC3541-3PoweredDown
0
1
X
BuckPoweredDown,VLDOPowered
Down,LinearRegulatorEnabled
1
0
BuckEnabled,VLDOPoweredDown,
LinearRegulatorPoweredDown,
BurstModeOperation
1
0
1
BuckEnabled,VLDOPoweredDown,
LinearRegulatorPoweredDown,
Pulse-SkipMode
1
0
BuckEnabled,VLDOEnabled,Linear
RegulatorPoweredDown,BurstMode
Operation
1
BuckEnabled,VLDOEnabled,Linear
RegulatorPoweredDown,Pulse-Skip
Mode
相關PDF資料
PDF描述
LTC3542EDC 0.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6
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