Data Sheet

Table Of Contents

Interfaces

TheTrackerSoMcanbepoweredviatheVIN(3.88V-12VDC)pin,overUSB,oraLiPobattery.

VIN

TheinputvoltagerangeonVINpinis3.88VDCto12VDC.WhenpoweringfromtheVINpinalone,

makesurethatthepowersupplyisratedat10W(forexample5VDCat2Amp).Ifthepowersource

isunabletomeetthisrequirement,you'llneedconnecttheLiPobatteryaswell.Anadditionalbulk

capacitanceof470uFto1000uFshouldbeaddedtotheVINinputwhentheLiPoBatteryis

disconnected.Theamountofcapacitancerequiredwilldependontheabilityofthepowersupply

todeliverpeakcurrentstothecellularmodem.

LiPo

Thispinservestwopurposes.YoucanusethispintoconnectaLiPobattery(eitherdirectlyorusing

aJSTconnector),oritcanbeusedtoconnectanexternalDCpowersource(andthisiswhereone

needstotakeextraprecautions).WhenpoweringitfromanexternalregulatedDCsource,the

recommendedinputvoltagerangeonthispinisbetween3.6Vto4.4VDC.Makesurethatthe

supplycanhandlecurrentsofatleast3Amp.Thisisthemostefficientwayofpoweringthemodule

sincethePMICbypassestheregulatorandsuppliespowertothemoduleviaaninternalFET

leadingtolowerquiescentcurrent.

WhenpoweredfromaLiPobatteryalone,thepowermanagementICswitchesofftheinternal

regulatorandsuppliespowertothesystemdirectlyfromthebattery.Thisreducestheconduction

lossesandmaximizesbatteryruntime.ThebatteryprovidedwiththemoduleisaLithium-Ion

Polymerbatteryratedat3.7VDC1,800mAh.Youcansubstitutethisbatterywithanother3.7VLiPo

withhighercurrentrating.Remembertoneverexceedthisvoltageratingandalwayspayattention

BLOCKDIAGRAM

POWER

2402-2480MHz