LT8620EMSE#TRPBF
NTA
Dav Input Voltage Range: 3.4V txog 65V
Ultralow Quiescent Current Burst Mode® Kev Ua Haujlwm:
2.5μA IQ Tswj 12VIN rau 3.3VOUT
Cov zis Ripple <10mVP-P
High Efficiency Synchronous Ua Haujlwm:
94% Efficiency ntawm 1A, 12VIN rau 5VOUT
92% Efficiency ntawm 1A, 12VIN rau 3.3VOUT
Fast 30ns Yam tsawg kawg nkaus Hloov-Ntawm Sijhawm
Kev poob qis qis hauv txhua qhov xwm txheej: 250mV ntawm 1A
Muaj kev nyab xeeb zam inductor saturation hauv overload
Tsawg EMI
Adjustable thiab Synchronizable: 200kHz txog 2.2MHz
Muaj tseeb 1V Pab kom Pin Threshold
Internal Compensation
Tso zis Soft-Start thiab taug qab
Me Thermally Enhanced 16-Lead MSOP thiab 24-Lead 3mm × 5mm QFN Pob
APPLICATIONS
Automotive thiab Industrial Supplies
General Purpose Step-down
GSM Cov Khoom Siv Hluav Taws Xob
Kev piav qhia
LT® 8620 yog ib qho compact, high efficiency, high speed synchronous monolithic step-down switching regulator uas lees txais ib qhov dav input voltage ntau txog 65V, thiab consumesonly 2.5µAofquiescent tam sim no.Topandbottom fais fab hloov pauv tau suav nrog txhua qhov tsim nyog circuitry kom txo qis qhov xav tau rau cov khoom siv sab nraud.Tsawg ripple Burst Hom kev ua haujlwm ua rau muaj kev ua haujlwm siab mus rau qhov tso zis tsawg heev thaum ua kom cov zis tawm hauv qab 10mVP-P.SYNC tus pin tso cai rau synchronization rau lub moos sab nraud.Kev them nyiaj sab hauv nrog lub ncov tam sim no hom topology tso cai rau siv cov inductors me me thiab ua rau cov lus teb nrawm nrawm thiab lub voj voog zoo.EN / UV tus pin muaj qhov tseeb 1V qhov pib thiab tuaj yeem siv rau programVIN undervoltage lockout lossis kaw LT8620 txo cov khoom nkag mus rau 1µA.Lub capacitor ntawm TR / SS tus pin cov kev pab cuam qhov tso zis voltage ramp tus nqi thaum pib.Lub PG chij taw qhia thaum VOUT nyob rau hauv ± 9% ntawm qhov programmed tso zis voltage raws li qhov ua txhaum cai.LT8620 muaj nyob rau hauv me me 16-Lead MSOP thiab 3mm × 5mmQFNpackages nrog cov ntaub qhwv rau cov thermal tsis tshua muaj.
LT8620 yog monolithic, tas li zaus, tam sim no hom step-down DC / DC converter.Ib qho oscillator, nrog zaus siv lub resistor ntawm RT tus pin, tig rau sab hauv sab saum toj fais fab hloov thaum pib ntawm txhua lub voj voog.Tam sim no nyob rau hauv inductor ces nce mus txog rau sab saum toj hloov tam sim no sib piv mus ncig ua si thiab tua lub sab saum toj fais fab hloov.Lub ncov inductor tam sim no nyob rau sab saum toj hloov tawm yog tswj los ntawm qhov hluav taws xob nyob rau hauv VC node.Qhov yuam kev amplifier servos lub VC node los ntawm kev sib piv cov voltage ntawm VFB tus pin nrog ib sab hauv 0.97V siv.Thaum lub load tam sim no nce nws ua rau txo qis hauv cov lus tawm tswv yim voltage txheeb ze rau kev siv ua qhov yuam kev amplifier nce VC voltageuntilthe nruab nrab inductor tam sim no matches thenew load tam sim no.Thaum lub tshuab hluav taws xob sab saum toj kaw, lub tshuab hluav taws xob synchronous hloov mus txog thaum lub voj voog tom ntej no pib lossis inductor tam sim no poob rau xoom.Yog tias cov xwm txheej dhau los ua rau ntau dua 3.9A ntws los ntawm kev hloov hauv qab, lub voj voog tom ntej yuav raug ncua kom txog thaum hloov tam sim no rov qab mus rau qib kev nyab xeeb.
Txheej txheem cej luam
LT3650 yog ib qho ua tiav monolithic, nruab nrab-lub zog, Li-Ionbattery charger, hais txog kev siv hluav taws xob ntau nrog cov kev daws teeb meem uas siv yam tsawg kawg ntawm cov khoom siv sab nraud.Lub IC siv 1MHz tas li-zaum, qhov nruab nrab tam sim no hom step-down architecture.
LT3650 suav nrog 2A hloov pauv uas tau tsav los ntawm bootstrappedsupplytomaximizeefficiency duringcharging cycles.Cov tswv yim dav dav tso cai rau kev ua haujlwm kom puv ntawm 9V txog 32V.Qhov kev txiav txim siab kaw tus pin tso cai rau kev koom ua ke ntawm UVLO kev ua haujlwm uas siv cov khoom sib cais yooj yim.Lub IC kuj tseem tuaj yeem muab tso rau hauv hom kaw tam sim no qis, uas cov khoom siv tawm tswv yim txo qis rau 15µA nkaus xwb.
LT3650 suav nrog ntau qib ntawm kev tswj hwm kev ywj pheej tam sim no.Tag nrho cov nqi siab tshaj plaws tam sim no tau teeb tsa siv lub zog sab nraud inductor tam sim no kev nkag siab resistor.Tus nqi siab tshaj plaws tam sim no programming tus pin tso cai rau dynamic manipulation ntawm lub roj teeb nqi tam sim no.Lub LT3650 kuj tseem suav nrog cov txheej txheem kev tawm tswv yim muab kev txwv tam sim no tswj kev ua haujlwm uas servos lub roj teeb them tam sim no kom haum rau tag nrho cov kev xav tau ntawm lub cev.
