LT8620EMSE#TRPBF
FEATURES
Wide Input Voltage Range: 3.4V kusvika 65V
Ultralow Quiscent Current Burst Mode® Kushanda:
2.5μA IQ Inotonga 12VIN kusvika 3.3VOUT
Kubuda Ripple <10mVP-P
Yakanyanya Kushanda Synchronous Operation:
94% Kubudirira pa1A, 12VIN kusvika 5VOUT
92% Kubudirira pa1A, 12VIN kusvika 3.3VOUT
Fast 30ns Minimum Switch-On Time
Kudonhedza kwakaderera pasi peMamiriro Ese: 250mV pa1A
Inoshivirira Zvakachengeteka Inductor Saturation mune Overload
Low EMI
Inochinjika uye Inochinjika: 200kHz kusvika 2.2MHz
Yakarurama 1V Gonesa Pin Threshold
Muripo Wemukati
Output Soft-Start uye Tracking
Diki Inosimudzira 16-Lead MSOP uye 24-Lead 3mm × 5mm QFN Packages.
APPLICATIONS
Zvemotokari uye Maindasitiri Supplies
General Chinangwa Nhanho-Pasi
GSM Power Supplies
DESCRIPTION
Iyo LT®8620 ndeye compact, yakanyanya kushanda zvakanaka, yakanyanya kumhanya synchronous monolithic nhanho-pasi switching regulator inogamuchira yakafara yekuisa voltage renji inosvika 65V, uye inopedza 2.5µAofquiescent ikozvino.Topandbottom power switches inosanganisirwa neyese inodiwa masekita kuderedza kudiwa kwezvinhu zvekunze.Yakaderera ripple Burst Mode mashandiro anogonesa kushanda kwepamusoro kudzika kusvika kune yakaderera kuburitsa mazvino uchichengeta inobuda ripple pazasi 10mVP-P.Pini yeSYNC inobvumira kuwiriranisa kune wachi yekunze.Muripo wemukati une peak ikozvino modhi topology inobvumira kushandiswa kwediki inductors uye inoguma nekukurumidza mhinduro yenguva pfupi uye yakanaka loop kugadzikana.Iyo EN/UV pini ine chaiyo 1V pachikumbaridzo uye inogona kushandiswa kuprogramVIN undervoltage lockout kana kuvhara iyo LT8620 ichidzikisa yekupinda yekugovera ikozvino ku1µA.A capacitor paTR/SS pini inoronga iyo inobuda voltage ramp rate panguva yekutanga-kumusoro.Iyo PG mureza inosaina kana VOUT iri mukati me ± 9% yeiyo yakarongwa yekubuda voltage pamwe nekukanganisa mamiriro.Iyo LT8620 inowanikwa mudiki 16-Lead MSOP uye 3mm × 5mmQFNpackage nemapadhi akafumurwa ekushomeka kwemafuta.
Iyo LT8620 ndeye monolithic, inogara frequency, yazvino modhi nhanho-pasi DC/DC inoshandura.An oscillator, ine frequency set ichishandisa resistor pa RT pini, inobatidza mukati mepamusoro simba switch pakutanga kwewachi yega yega.Yazvino muinductor yobva yawedzera kudzamara iyo yekumusoro switch yazvino muenzanisi yafamba uye ichidzima kumusoro kwesimba switch.Iyo peak inductor ikozvino painodzima switch yekumusoro inodzorwa nevoltage pane yemukati VC node.Iko kukanganisa amplifier servos iyo VC node nekuenzanisa voltage paVFB pini ine yemukati 0.97V referensi.Kana mutoro wazvino ukawedzera zvinokonzeresa kudzikiswa kwevoltage yemhinduro inoenderana nereferensi inotungamira kukanganisa amplifier kusimudza iyo VC voltage kusvika avhareji inductor parizvino inoenderana neazvino mutoro.Kana iyo yekumusoro simba switch yadzima, iyo synchronous simba switch inobatidzwa kusvika inotevera wachi kutenderera kwatanga kana inductor ikozvino inowira ku zero.Kana mamiriro ekuremerwa achikonzera kupfuura 3.9A kuyerera nepazasi switch, iyo inotevera wachi inononoka kusvika chinja chazvino chadzokera padanho rakachengeteka.
Overview
LT3650 ndeye yakazara monolithic, yepakati-simba, Li-Ionbattery charger, inogadzirisa yakakwira yekupinza voltage maapplication ane mhinduro dzinoshandisa hushoma hwekunze zvinhu.Iyo IC inoshandisa 1MHz inogara-frequency, avhareji yazvino modhi nhanho-pasi architecture.
Iyo LT3650 inosanganisira 2A switch iyo inofambiswa nebootstrappedsupplytomaximizeefficiency panguva yekuchaja ma cycles.Iyo yakafararira yekuisa siyana inobvumira oparesheni kuti izere kubva pa9V kusvika 32V.Pini chaiyo yekuvhara chikumbaridzo inobvumira kubatanidzwa kweUVLO mashandiro uchishandisa iri nyore resistor divider.Iyo IC inogona zvakare kuiswa mune yakaderera ikozvino yekudzima modhi, umo iyo yekuisa yekuisa bias inoderedzwa kusvika 15µA chete.
Iyo LT3650 inosanganisira akati wandei madhigirii ekuchaja ikozvino kudzora rusununguko.Iyo yakazara yekuchajisa yazvino inosetwa uchishandisa yekunze inductor current sense resistor.Iyo yakanyanya kuchaja ikozvino purogiramu yepini inobvumira kushandura kune simba kwebhatiri kuchaja ikozvino.Iyo LT3650 inosanganisirawo system yekuisa yekugovera ikozvino muganho wekudzora ficha iyo inosevha iyo bhatiri kuchaja ikozvino kuti ikwane yakazara system mutoro zvinodiwa.
