globalsat

M

P

S

C

O

N

F

I

D

E

N

T

I

A

L

D

O

N

O

T

D

I

S

T

R

I

B

U

T

E

MP1494

HighEfficiency2A,16V,500kHz

SynchronousStepDownConverter

PRELIMINARYSPECIFICATIONSSUBJECTTOCHANGE

MPSCONFIDENTIALANDPROPRIETARYINFORMATION–GLOBALSATUSEONLY

1

7/4/orizedPhotocopyandDuplicationProhibited.

PreliminarySpecificationsSubjecttoChange©htsRerved.

TheFutureofAnalogICTechnology

DESCRIPTION

TheMP1494isahighfrequencysynchronous

rectifiedstep-downswitchmodeconverterwith

rsa

verycompactsolutiontoachieve2Acontinuous

outputcurrentoverawideinputsupplyrange

MP1494hassynchronousmodeoperationfor

higherefficiencyoveroutputcurrentloadrange.

Currentmodeoperationprovidesfasttransient

responandeasloopstabilization.

FullprotectionfeaturesincludeOCPand

thermalshutdown.

TheMP1494requiresaminimumnumberof

readilyavailablestandardexternalcomponents

andisavailableinaspacesaving8-pin

TSOT23package.

FEATURES

•Wide4Vto16VOperatingInputRange

•120mΩ/50mΩLowRds(on)InternalPower

MOSFETs

•ProprietarySwitchingLossReduction

Technique

•HighEfficiencySynchronousMode

Operation

•Fixed500kHzSwitchingFrequency

•Syncfrom200kHzto2MHzExternalClock

•AAMPowerSaveMode

•InternalSoftStart

•OCPProtectionandHiccup

•ThermalShutdown

•OutputAdjustablefrom0.8V

•Availableinan8-pinTSOT-23package

APPLICATIONS

•NotebookSystemsandI/OPower

•DigitalSetTopBoxes

•FlatPanelTelevisionandMonitors

•DistributedPowerSystems

ForMPSgreenstatus,pleavisitMPSwebsiteunderQualityAssurance.

“MPS”and“TheFutureofAnalogICTechnology”areRegisteredTrademarksof

MonolithicPowerSystems,Inc.

TYPICALAPPLICATION

M

P

S

C

O

N

F

I

D

E

N

T

I

A

L

D

O

N

O

T

D

I

S

T

R

I

B

U

T

E

MP1494–SYNCHRONOUSSTEP-DOWNCONVERTER

PRELIMINARYSPECIFICATIONSSUBJECTTOCHANGE

MPSCONFIDENTIALANDPROPRIETARYINFORMATION–GLOBALSATUSEONLY

2

7/4/orizedPhotocopyandDuplicationProhibited.

PreliminarySpecificationsSubjecttoChange©htsRerved.

ORDERINGINFORMATION

PartNumber*PackageTopMarkingFreeAirTemperature(T

A

)

MP1494DJTSOT-23-8TBD

-40°Cto+85°C

*ForTape&Reel,addsuffix–Z(1494DJ–Z);

ForRoHS,compliantpackaging,addsuffix–LF(1494DJ–LF–Z).

PACKAGEREFERENCE

TOPVIEW

ABSOLUTEMAXIMUMRATINGS(1)

V

IN

..................................................-0.3Vto18V

V

SW

.........................-0.3V(-5Vfor<10ns)to19V

V

BS

.........................................................V

SW

+6V

AllOtherPins................................-0.3Vto6.5V

ContinuousPowerDissipation(T

A

=+25°C)

(2)

.............................................................1.4W

JunctionTemperature...............................150°C

LeadTemperature....................................260°C

StorageTemperature.................-65°Cto150°C

RecommendedOperatingConditions

(3)

SupplyVoltageV

IN

..............................4Vto16V

OutputVoltageV

OUT

.....................0.8VtoV

IN

-3V

MaximumJunctionTemp.(T

J

)................+125°C

ThermalResistance

(4)

θ

JA

θ

JC

TSOT-23-8..............................90......??...°C/W

Notes:

1)Exceedingtheratingsmaydamagethedevice.

2)Themaximumallowablepowerdissipationisafunctionofthe

maximumjunctiontemperatureT

J

(MAX),thejunction-to-

ambientthermalresistanceθ

JA

,andtheambienttemperature

T

A

.Themaximumallowablecontinuouspowerdissipationat

anyambienttemperatureiscalculatedbyP

D

(MAX)=(T

J

(MAX)-T

A

)/θ

JA

.Exceedingthemaximumallowablepower

dissipationwillcauexcessivedietemperature,andthe

althermal

shutdowncircuitryprotectsthedevicefrompermanent

damage.

3)Thedeviceisnotguaranteedtofunctionoutsideofits

operatingconditions.

4)MeasuredonJESD51-7,4-layerPCB.