LT8620EMSE#TRPBF
LIKAROLOANA
Wide Input Voltage Range: 3.4V ho 65V
Ts'ebetso ea Ultralow Quiscent Current Burst Mode®:
2.5μA IQ e Laolang 12VIN ho 3.3VOUT
Output Ripple < 10mVP-P
Ts'ebetso ea Synchronous e sebetsang hantle haholo:
94% Katleho ho 1A, 12VIN ho isa ho 5VOUT
92% Katleho ho 1A, 12VIN ho 3.3VOUT
Nako e Potlakileng ea 30ns Nako e Nyenyane ea ho Fetola
Phaello e Tlase Tlas'a Maemo 'Ohle: 250mV ho 1A
E Mamella ka Bolokehile ho Inductor Saturation ho Overload
EMI e tlase
E ka feto-fetoha 'me ea khoneha: 200kHz ho isa ho 2.2MHz
1V e Nepahetseng ea Pin Threshold
Matšeliso a ka Hare
Output Soft-Start and Tracking
16-Lead e Nyenyane ea 16-Lead MSOP le 24-Lead 3mm × 5mm QFN Packages
LIKOPO
Phepelo ea Likoloi le Liindasteri
Morero oa Kakaretso Ho theoha
Lisebelisoa tsa Matla a GSM
TLHALOSO
LT®8620 ke compact, e sebetsang hantle haholo, lebelo le phahameng la synchronous monolithic step-down switching regulator e amohelang mefuta e mengata ea motlakase e kenang ho fihla ho 65V, mme e sebelisa 2.5µAofquiescent hajoale.Li-switches tsa matla tsa topandbottom li kenyellelitsoe le li-circuits tsohle tse hlokahalang ho fokotsa tlhoko ea likarolo tsa kantle.Ts'ebetso e tlase ea Ripple Burst Mode e nolofalletsa ts'ebetso e phahameng ho theosa ho ea ho maqhubu a tlase haholo ha e ntse e boloka tlhahiso e le ka tlase ho 10mVP-P.Pini ea SYNC e lumella ho amahanngoa le oache e kantle.Matšeliso a ka hare a nang le topology ea maemo a holimo a hajoale a lumella tšebeliso ea li-inductors tse nyane mme e fella ka karabelo ea nakoana le botsitso bo botle ba loop.Pini ea EN/UV e na le moeli o nepahetseng oa 1V mme e ka sebelisoa ho notlela ka tlas'a motlakase oa programVIN kapa ho koala LT8620 ho fokotsa phepelo ea hona joale ho 1µA.Capacitor ho TR/SS pin e hlophisa sekhahla sa lebelo la motlakase nakong ea ho qala.Folakha ea PG e bontša ha VOUT e le ka har'a ± 9% ea motlakase o hlahisoang o hlophisitsoeng hammoho le maemo a phoso.LT8620 e fumaneha ka lipakete tse nyane tsa 16-Lead MSOP le 3mm×5mmQFNpackages ka lipache tse pepesitsoeng bakeng sa ho hanyetsa mocheso o tlase.
LT8620 ke monolithic, khafetsa khafetsa, mokhoa oa hajoale oa ho theola DC/DC converter.Oscillator, e nang le frequency sete e sebelisa sehanyetsi ho phini ea RT, e bulela sesebelisoa sa motlakase se kaholimo qalong ea oache ka 'ngoe.Hona joale ho inductor e ea eketseha ho fihlela sebapi sa hona joale se ka holimo se tsamaea 'me se tima sesebelisoa sa motlakase se ka holimo.The peak inductor current moo switch top e timang e laoloa ke voltage ho node ea ka hare ea VC.Amplifier ea phoso e sebeletsa node ea VC ka ho bapisa motlakase ho phini ea VFB le referense ea ka hare ea 0.97V.Ha mojaro oa hona joale o ntse o eketseha o baka phokotso ea voltage ea maikutlo e amanang le referense e lebisang seamplifier sa phoso ho phahamisa voltage ea VC ho fihlela inductor e tloaelehileng e tsamaisana le mojaro o mocha oa hona joale.Ha sesebelisoa sa motlakase se ka holimo se tima, sesebelisoa sa matla sa synchronous se tla buleha ho fihlela oache e latelang e qala kapa inductor current e oela ho zero.Haeba maemo a ho tlala a etsa hore ho feta 3.9A e phalle ka switch e ka tlase, potoloho e latelang ea oache e tla lieha ho fihlela switch ea hona joale e khutlela boemong bo sireletsehileng.
Kakaretso
LT3650ke tjhaja e felletseng ea monolithic, e bohareng, ea Li-Ionbattery, e sebetsanang le lits'ebetso tse phahameng tsa motlakase tse kenang ka litharollo tse sebelisang bonyane ba likarolo tsa kantle.IC e sebelisa 1MHz khafetsa-frequency, karolelano ea maemo a hajoale a meaho ea ho theoha.
LT3650 e kenyelletsa switch ea 2A e tsamaisoang ke bootstrappedsupplytomaximizeefficiency nakong ea li-cycle tsa ho tjhaja.Mefuta e mengata e fapaneng e lumella ts'ebetso ho tjhaja ka botlalo ho tloha ho 9V ho isa ho 32V.Pini e nepahetseng ea ho koala e lumella ho kenyeletsoa ha ts'ebetso ea UVLO ho sebelisa mohanyetsi o bonolo oa ho hanyetsa.IC e ka boela ea kenngoa ka mokhoa o tlaase oa hona joale oa ho koala, moo khetho ea ho kenya letsoho e fokotsoang ho 15µA feela.
LT3650 e kenyelletsa likhato tse 'maloa tsa tokoloho ea taolo ea hajoale.Kakaretso ea boholo ba tefiso ea hona joale e behiloe ho sebelisoa mochine o motlakase oa kantle oa inductor.Pini ea ho tjhaja e phahameng ea hajoale e lumella ho thetsoa ka matla ha tjhaja ea betri hajoale.LT3650 e boetse e kenyelletsa karolo ea taolo ea moeli ea phepelo ea sistimi e sebelisang tefiso ea betri hajoale ho amohela litlhoko tsa kakaretso tsa sistimi.
