LTC3541 datasheet(3/20 Pages) LINER

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LTC3541

3541fa

The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified (Note 2)

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Buck+VLDO

BurstModeSleep

VINQuiescentCurrent

LVIN=1.5V,LVOUT=1.2V,ENBUCK=VIN,

ENVLDO=VIN,MODE=0V,IOUT(VLDO)=10µA,

VBUCKFB=0.9V

µA

Buck+VLDO

BurstModeActive

VINQuiescentCurrent

LVIN=1.5V,LVOUT=1.2V,ENBUCK=VIN,

ENVLDO=VIN,MODE=0V,IOUT(VLDO)=10µA,

VBUCKFB=0.7V

315

µA

Buck+VLDO

Pulse-SkipModeActive

VINQuiescentCurrent

LVIN=1.5V,LVOUT=1.2V,ENBUCK=VIN,

ENVLDO=VIN,MODE=VIN,IOUT(VLDO)=10µA,

VBUCKFB=0.7V

300

µA

Buck

BurstModeSleep

VINQuiescentCurrent

VBUCKFB=0.9V,IOUT(BUCK)=0A,ENBUCK=VIN,

ENVLDO=0V,MODE=0V

µA

Buck

BurstModeActive

VINQuiscentCurrent

VBUCKFB=0.7V,IOUT(BUCK)=0A,ENBUCK=VIN,

ENVLDO=0V,MODE=0V

300

µA

Buck

Pulse-SkipModeActive

VINQuiescentCurrent

VBUCKFB=0.7V,IOUT(BUCK)=0A,ENBUCK=VIN,

ENVLDO=0V,MODE=VIN

285

µA

LinearRegulatorVINQuiescent

Current

LVOUT=1.2V,ENBUCK=0V,ENVLDO=VIN,

IOUT(LREG)=10µA

µA

VINShutdownQuiescentCurrent ENBUCK=0V,ENVLDO=0V

2.5

µA

LVINShutdownQuiescentCurrent LVIN=3.6V,ENBUCK=0V,ENVLDO=0V

0.1

µA

fOSC

OscillatorFrequency

●

1.8

2.25

2.7

MHz

RPFET

RDS(ON)ofP-ChannelMOSFET

ISW=100mA

0.25

RNFET

RDS(ON)ofN-ChannelMOSFET

ISW=100mA

0.35

ILSW

SWLeakage

Enable=0V,VSW=0Vor6V,VIN=6V

±0.01

±1

µA

VIH

InputPinHighThreshold

MODE,ENBUCK,ENVLDO

●

0.9

VIL

InputPinLowThreshold

MODE,ENBUCK,ENVLDO

●

0.3

IMODE,

IENBUCK,

IENVLDO

InputPinCurrent

●

±0.01

±1

µA

Note 1:StressesbeyondthoselistedunderAbsoluteMaximumRatings

maycausepermanentdamagetothedevice.ExposuretoanyAbsolute

MaximumRatingconditionforextendedperiodsmayaffectdevice

reliabilityandlifetime.

Note 2:TheLTC3541isguaranteedtomeetperformancespecifications

from0°Cto85°C.VLDO/linearregulatoroutputistestedandspecified

underpulseloadconditionssuchthatTJ≈TA,andare100%production

testedat25°C.Specificationsoverthe–40°Cto85°Coperating

temperaturerangeareassuredbydesign,characterizationandcorrelation

withstatisticalprocesscontrols.

Note 3:MinimumoperatingLVINvoltagerequiredforVLDOregulator

regulationis:

LVIN≥LVOUT+VDROPOUTandLVIN≥0.9V

Note 4:MinimumoperatingVINvoltagerequiredforVLDOregulatorand

linearregulatorregulationis:

VIN≥LVOUT+1.4VandVIN≥2.7V

Note 5:TJiscalculatedfromtheambienttemperature,TA,andpower

dissipation,PD,accordingtothefollowingformula:

TJ=TA+(PD•43°C/W)

Note 6:TheLTC3541istestedinaproprietarytestmodethatconnects

VBUCKFBtotheoutputoftheerroramplifier.Forthereferenceregulation

andlineregulationtests,theoutputoftheerroramplifierissettothe

midpoint.Fortheloadregulationtest,theoutputoftheerroramplifieris

driventominimumandmaximumofthesignalrange.

Note 7:Measurementmadeinclosedlooplinearregulatorconfiguration

withLVOUT=1.2V,ILOAD=10µA.

Note 8:Measurementmadeinaproprietarytestmodewithslope

compensationdisabled.

Note 9:Measurementisassuredbydesign,characterizationandstatistical

processcontrol.

Note 10:ThisICincludesovertemperatureprotectionthatisintended

toprotectthedeviceduringmomentaryoverloadconditions.Junction

temperaturewillexceed125°Cwhenovertemperatureprotectionisactive.

Continuousoperationabovethespecifiedmaximumoperatingjunction

temperaturemayimpairdevicereliability.

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