LTC3857EGN-1 datasheet(2/38 Pages) LINER

Part #	LTC3857EGN-1

Description	Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

Download	38 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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2 / 38 page

LTC3857-1

38571fa

absoluTe MaxiMuM raTings

(Note 1)

orDer inForMaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3857EGN-1#PBF

LTC3857EGN-1#TRPBF

LTC3857GN-1

28-LeadPlasticSSOP

–40°Cto125°C

LTC3857IGN-1#PBF

LTC3857IGN-1#TRPBF

LTC3857GN-1

28-LeadPlasticSSOP

–40°Cto125°C

ConsultLTCMarketingforpartsspecifiedwithwideroperatingtemperatureranges.*Thetemperaturegradeisidentifiedbyalabelontheshippingcontainer.

ConsultLTCMarketingforinformationonnon-standardleadbasedfinishparts.

Formoreinformationonleadfreepartmarking,goto:http://www.linear.com/leadfree/

Formoreinformationontapeandreelspecifications,goto:http://www.linear.com/tapeandreel/

InputSupplyVoltage(VIN)......................... –0.3Vto40V

TopsideDriverVoltages

BOOST1,BOOST2................................. –0.3Vto46V

SwitchVoltage(SW1,SW2)........................ –5Vto40V

(BOOST1-SW1),(BOOST2-SW2),INTVCC... –0.3Vto6V

RUN1,RUN2................................................ –0.3Vto8V

MaximumCurrentSourcedintoPin

fromSource>8V...............................................100µA

SENSE1+,SENSE2+,SENSE1–

SENSE2–Voltages...................................... –0.3Vto28V

PLLIN/MODE,FREQVoltages.............. –0.3VtoINTVCC

EXTVCC...................................................... –0.3Vto14V

ITH1,ITH2,VFB1,VFB2Voltages...................... –0.3Vto6V

PGOOD1Voltage......................................... –0.3Vto6V

TRACK/SS1,TRACK/SS2Voltages.............. –0.3Vto6V

OperatingJunctionTemperatureRange

(Note2).................................................. –40°Cto125°C

MaximumJunctionTemperature(Note3)............ 125°C

StorageTemperatureRange................... –65°Cto150°C

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TOP VIEW

GN PACKAGE

28-LEAD PLASTIC SSOP

28

27

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15

ITH1

VFB1

SENSE1+

SENSE1–

FREQ

PLLIN/MODE

SGND

RUN1

RUN2

SENSE2–

SENSE2+

VFB2

ITH2

TRACK/SS2

TRACK/SS1

PGOOD1

TG1

SW1

BOOST1

BG1

VIN

PGND

EXTVCC

INTVCC

BG2

BOOST2

SW2

TG2

TJMAX=125°C,θJA=90°C/W

pin conFiguraTion

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LTC3857EGN-1 Datasheet(PDF) 2 Page - Linear Technology

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