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V

CC

(V)

I

CC

(µA)

12345678910

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

Iq_v

25°C

-40°C

125°C

LP3470A

VCC

GND

RESET

Microcontroller

VCC

RESET

LDOIN OUT

SRT

VCC1

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Now

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP3470A

SNVSBF5C–JULY2019–REVISEDMAY2020

LP3470AUltraLowPowerVoltageSupervisorWithProgrammableDelayand1%Reset

Threshold

1

1Features

1

•Pin-to-pincompatiblewithLP3470

•5-PinSOT-23package

•Open-drainRESEToutput

•Programmableresettime-outperiodusingan

externalcapacitor

•ImmunetoshortVCCtransients

•±1%Resetthresholdaccuracy(typical)

•Ultra-lowquiescentcurrent(0.3µAtypical)

•RESETvaliddowntoVCC=0.95V

2Applications

•CriticalµPandµCpowermonitoring

•Intelligentinstruments

•Computers

•Portableandbattery-poweredequipment

•Buildingautomation:buildingsecuritysystem,

videosurveillance

•Factoryautomation:fieldtransmitters,position

andproximitysensors

•Motordrives

3Description

TheLP3470Adeviceisamicropowervoltage

supervisorycircuitdesignedtomonitorvoltages

within1%ofresetthresholdovertemperatureandis

pin-to-pincompatiblewithexistingTIdeviceLP3470.

TheLP3470Adeviceprovidesaccurate,nano-power

voltagemonitoringwithprogrammabledelay.

TheLP3470Aassertsaresetsignalwheneverthe

VCCsupplyvoltagefallsbelowaresetthreshold.The

resettime-outperiodisadjustableusinganexternal

capacitor.Resetremainsassertedforaninterval

(programmedbyanexternalcapacitor)afterVCChas

risenabovethethresholdvoltageplushysteresis.

Forinformationonavailableresetthresholdvoltage

options,seeMechanical,Packaging,andOrderable

Information.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LP3470ASOT-23(5)1.60mm×2.90mm

(1)Forallavailablepackages,seethePackageOption

Addendumattheendofthedatasheet.

BasicOperatingCircuitTypicalSupplyCurrentforLP3470A

Produktspecifikationer