isitolo esinezitophu esisodwa sezingxenye ze-elekthronikhi TLV1117LV33DCYR SOT223 isilawuli se-chip ic yesekethe ehlanganisiwe

isitolo esisodwa sezingxenye ze-elekthronikhi TLV1117LV33DCYR SOT223 isilawuli se-chip ic isekethe ehlanganisiwe Isithombe esifakiwe

incazelo emfushane:

Uchungechunge lwe-TLV1117LV lwe-low-dropout(LDO) linearegulator inguqulo yamandla kagesi aphansi wokufakwayo kwesilawuli samandla kagesi se-TLV1 117 esidumile.
I-TLV1117LV iyidivayisi enamandla aphansi kakhulu edla amandla aphansi ngokuthula izikhathi ezingu-500 kunezilawuli zamandla kagesi ezijwayelekile ezingu-11 17, okwenza idivayisi ifanelekele izinhlelo zokusebenza ezigunyaza ukusebenza kokubekwe eceleni okuphansi kakhulu.Umndeni we-TLV1117LV we-LDOS nawo uzinzile ngo-0 mA womthwalo wamanje: asikho isidingo esincane sokulayisha, okwenza idivayisi ibe yisinqumo esiwusizo ezinhlelweni zokusebenza lapho umlawuli efaka amandla emithwalweni emincane kakhulu ngesikhathi sokubekwe eceleni ngaphezu kwemisinga emikhulu ngendlela engu-1 A ngesikhathi sokusebenza okujwayelekile.I-TLV1117LV inikeza ukusebenza kwesikhashana okuhle kakhulu komugqa kanye nokulayisha okudlulayo, okuholela ekuncipheni okuncane kakhulu kanye nokudlula kwamandla kagesi okukhiphayo lapho isidingo samanje somthwalo sishintsha sisuka ngaphansi kuka-1 MA siye ngaphezu kuka-500 mA.

Thumela i-imeyili kithi Landa i-Datesheet

Imininingwane Yomkhiqizo

Omaka bomkhiqizo

I-bandgap enembile kanye ne-amplifier yamaphutha inikeza ukunemba okungu-1.5%.Isilinganiso esiphakeme kakhulu sokunqatshelwa kokunikezwa kwamandla (PSRR) sinika amandla ukusetshenziswa kwedivayisi ukuze kufakwe i-postegulation ngemva kwesilawuli esishintshayo.Ezinye izici ezibalulekile zifaka umsindo ophumayo ophansi kanye ne-low-dropou tvoltage.
Idivayisi inxeshezelwa ngaphakathi ukuze izinze ngama-capacitor angu-0-Ω equivalent series resistance (ESR).Lezi zinzuzo ezibalulekile zivumela ukusetshenziswa kwezindleko ezingabizi, ama-capacitor e-ceramic amancane.Ama-capacitor abizayo anama-voltage aphezulu achemile kanye nokuncipha kwezinga lokushisa nawo angasetshenziswa uma efunwaUchungechunge lwe-TLV1117LV luyatholakala kuphakheji ye-SOT-223.

Izimfanelo Zomkhiqizo

UHLOBO	DESCRIPTION
Isigaba	Izifunda Ezihlanganisiwe (ICs) PMIC - Voltage Regulators - Linear
Mfr	Texas Instruments
Uchungechunge	-
Iphakheji	I-Tape & Reel (TR) Cut Tape (CT) I-Digi-Reel®
SPQ
Isimo somkhiqizo	Iyasebenza
Ukucushwa Kokukhiphayo	Okuhle
Uhlobo Lokukhiphayo	Kulungisiwe
Inombolo Yabalawuli	1
I-Voltage - Okokufaka (Ubukhulu)	5.5V
I-Voltage - Okukhiphayo (Okuncane/Okulungisiwe)	3.3V
I-Voltage - Okukhiphayo (Ubukhulu)	-
I-Voltage Dropout (Ubukhulu)	1.3V @ 800mA
Okwamanje - Okukhiphayo	1A
Okwamanje - Quescent (Iq)	100µA
I-PSRR	75dB (120Hz)
Lawula izici	-
Izici Zokuvikela	Ngaphezulu Kwamanje, Ngokwezinga Lokushisa
Izinga Lokushisa Lokusebenza	-40°C ~ 125°C
Uhlobo Lokukhweza	INtaba Engaphezulu
Iphakheji / Ikesi	TO-261-4, TO-261AA
Iphakheji Yedivayisi Yomhlinzeki	I-SOT-223-4
Inombolo Yomkhiqizo Eyisisekelo	I-TLV1117

Isilawuli se-LDO?

I-LDO, noma i-low dropout regulator, isilawuli somugqa esiphansi sokuyeka ukuphuma.Lokhu kuhlobene nesilawuli somugqa wendabuko.Izilawuli zomugqa zendabuko, njengochungechunge lwama-chips angu-78XX, zidinga i-voltage yokufaka okungenani ibe ngu-2V~3V ephakeme kune-voltage ephumayo, ngaphandle kwalokho, ngeke zisebenze kahle.Kodwa kwezinye izimo, isimo esinjalo sinzima kakhulu, njenge-5V kuya ku-3.3V, umehluko we-voltage phakathi kokokufaka nokukhiphayo ungu-1.7v kuphela, ongahlangabezani nezimo zokusebenza zezilawuli zomugqa wendabuko.Ukuphendula lesi simo, abakhiqizi bama-chip bathuthukise ama-chips okuguqula amandla kagesi wohlobo lwe-LDO.
I-LDO iyisilawuli somugqa esisebenzisa i-transistor noma ishubhu le-field-effect (FET) elisebenza endaweni yalo yokugcwala ukuze likhiqize amandla kagesi alawulwayo ngokukhipha i-voltage eyeqile ku-voltage yokufaka yohlelo lokusebenza.I-voltage eyehlayo ingumehluko omncane phakathi kwe-voltage yokufaka kanye ne-voltage ephumayo edingekayo ukuze isilawuli sigcine i-voltage ephumayo ngaphakathi kuka-100mV ngaphezulu noma ngaphansi kwenani layo elivamile.Izilawuli ze-Positive voltage voltage LDO (low dropout) ngokuvamile zisebenzisa i-transistor yamandla (eyaziwa nangokuthi idivayisi yokudlulisa) njenge-PNP.le transistor ivunyelwe ukuthi igcwale ukuze isilawuli sibe ne-voltage ephansi kakhulu yokuyeka, ngokuvamile ezungeze u-200mV;ngokuqhathanisa, izilawuli zomugqa ezivamile ezisebenzisa i-NPN composite power transistors zinokuyeka okungaba ngu-2V.Okukhiphayo okunegethivu i-LDO isebenzisa i-NPN njengedivayisi yayo yokulethwa futhi isebenza ngemodi efanayo nedivayisi ye-PNP yokuphumayo okuhle kwe-LDO.

Intuthuko emisha isebenzisa ama-transistors wamandla e-MOS, akwazi ukuhlinzeka ngogesi ophansi kakhulu wokuyeka ukuphuma.Nge-MOS yamandla, ukwehla kwe-voltage kuphela ngesilawuli kubangelwa ukumelana kwe-ON komthwalo wamanje wedivayisi yokunikeza amandla.Uma umthwalo umncane, ukwehla kwamandla kagesi okukhiqizwa ngale ndlela kungama-millivolts ambalwa kuphela.
I-DC-DC isho ukuthi i-DC ukuya ku-DC (ukuguqulwa kwamanani ahlukene okunikezwa kwe-DC) futhi noma iyiphi idivayisi ehlangabezana nale ncazelo ingabizwa ngokuthi isiguquli se-DC-DC, okuhlanganisa nama-LDO, kodwa igama elivamile liwukushayela imishini lapho i-DC iye ku-DC ifinyelelwa ngokushintshanisa. .
I-LDO imele i-low dropout voltage, echazwe endimeni eyodwa: Izindleko eziphansi, umsindo ophansi, namandla athule aphansi we-low dropout (LDO) yokulawula umugqa kuyizinzuzo zayo ezivelele.Kudinga futhi izingxenye ezimbalwa zangaphandle, ngokuvamile i-bypass capacitor eyodwa noma amabili.Izilawuli ezintsha zomugqa we-LDO zingafinyelela lokhu kucaciswa okulandelayo: umsindo ophumayo ongu-30μV, i-PSRR ka-60dB, kanye namandla athule ka-6μA (i-TI's TPS78001 ifinyelela ku-Iq=0.5uA), kanye nokwehla kwamandla kagesi angu-100mV kuphela (ama-LDO akhiqizwe ngobuningi be-TI anesimangalo. 0.1mV).Isizathu esiyinhloko sokuthi kungani izilawuli zomugqa we-LDO zingafinyelela leli zinga lokusebenza ukuthi ishubhu yesilawuli kuzo i-MOSFET yesiteshi se-P, kuyilapho izilawuli zomugqa ezijwayelekile zisebenzisa ama-PNP transistors.i-P-channel MOSFET iqhutshwa yi-voltage futhi ayidingi okwamanje, ngakho-ke inciphisa kakhulu okwamanje esetshenziswa idivayisi ngokwayo;Ngakolunye uhlangothi, kuma-circuits ane-PNP transistors, vimbela i-PNP Ngakolunye uhlangothi, kuma-circuits ane-PNP transistors, ukwehla kwe-voltage phakathi kokufaka nokuphumayo akufanele kube phansi kakhulu ukuvimbela i-PNP transistor ekugcwaleni nasekunciphiseni amandla okukhipha;ukwehla kwamandla kagesi ku-P-channel MOSFET cishe kulingana nomkhiqizo wokuphumayo kwamanje kanye nokumelana nokumelana.Njengoba ukumelana kwe-MOSFET kukuncane kakhulu, ukwehla kwamandla kagesi kuyo yonke indawo kuphansi kakhulu.

Uma ama-voltages okokufaka nokuphumayo asondelene kakhulu, kungcono ukusebenzisa isilawuli se-LDO, esingafinyelela ukusebenza kahle okuphezulu kakhulu.Ngakho-ke, izilawuli ze-LDO zisetshenziswa kakhulu ezinhlelweni lapho i-lithium-ion battery voltage iguqulelwa ku-3V okukhiphayo voltage.Nakuba amandla ebhethri engasetshenziswa kumaphesenti ayishumi okugcina, isilawuli se-LDO sisengaqinisekisa isikhathi eside sokusebenza kwebhethri nomsindo ophansi.
Uma ama-voltages okufakwayo nokukhishwayo engasondeli kakhulu, i-DCDC yokushintsha kufanele icatshangelwe ngoba, njengoba kungabonakala kusuka kumgomo ongenhla, i-current input ye-LDO ilingana nokukhishwa kwamanje, futhi uma ukwehla kwe-voltage kukhulu kakhulu, amandla asetshenziswa ku-LDO makhulu kakhulu futhi awasebenzi kahle kakhulu.
Iziguquli ze-DC-DC zifaka amasekhethi okusuka phezulu, awe phansi, awaphezulu/phansi, namasekhethi aguqulayo.izinzuzo zeziguquli ze-DC-DC zisebenza kahle kakhulu, kanye nekhono lokukhipha imisinga ephezulu kanye namaza aphansi athule.Ngokuhlanganisa okuthuthukisiwe, iziguquli eziningi ezintsha ze-DC-DC zidinga kuphela ama-inductors angaphandle ambalwa nama-capacitor okuhlunga.Kodwa-ke, ukushaya kokukhishwayo nomsindo wokushintsha walezi zilawuli zamandla kuphezulu futhi izindleko ziphakeme uma kuqhathaniswa.
Eminyakeni yakamuva, ngokuthuthukiswa kobuchwepheshe be-semiconductor, ama-surface-mount inductors, ama-capacitor, nama-chips okulawula okuphakelwa kwamandla ahlanganiswe kakhulu abe mancane futhi aba mancane ngezindleko.Isibonelo, ku-voltage yokufaka engu-3V, ukuphuma kwe-5V/2A kungatholwa kusetshenziswa i-NFET eku-chip.Okwesibili, ekusetshenzisweni kwamandla amancane kuya kwaphakathi, amaphakheji amancane angabizi kakhulu angasetshenziswa.Ngaphezu kwalokho, uma imvamisa yokushintsha inyuselwa ku-1MHz, kungenzeka ukunciphisa izindleko nokusebenzisa ama-inductors nama-capacitor amancane.Amanye amadivayisi amasha futhi engeza izici eziningi ezintsha ezifana nesiqalo esithambile, umkhawulo wamanje, i-PFM, noma ukukhetha kwemodi ye-PWM.
Ngokuvamile, ukukhetha kwe-DCDC ukuze kuthuthukiswe kuyadingeka.Ngesamba semali, ukukhetha kwe-DCDC noma i-LDO kuyisiqhathaniso ngokwezindleko, ukusebenza kahle, umsindo, nokusebenza.

Umehluko oyinhloko

I-LDO iyisilawuli somugqa sokuyeka ukuphuma kwamandla amancane esivame ukuba nomsindo ophansi kakhulu kanye neRatio Yokunqatshwa Kwamandla aphezulu (PSRR).
I-LDO iyisizukulwane esisha sabalawuli besifunda abadidiyelwe, abahluke kakhulu esivivinyweni ngokuthi i-LDO iwuhlelo oluncane ku-chip (SoC) olunokuzisebenzisa okuphansi kakhulu.Ingasetshenziselwa ukulawulwa kwesiteshi esikhulu samanje, i-chip ihlanganise ama-MOSFET anokumelana okuphansi kakhulu kwe-inthanethi, ama-Schottky diode, ama-resistors amasampula, ama-voltage divider resistors, namanye amasekethe e-hardware, futhi inokuvikelwa kwamanje, izinga lokushisa elingaphezulu. isivikelo, umthombo wereferensi wokunemba, i-amplifier ehlukile, ukubambezeleka, njll. I-PG isizukulwane esisha se-LDO, ngokuzihlola ngakunye kwesimo sokukhiphayo, ukubambezeleka komsebenzi wokuphakelwa kwamandla okuphepha, kungabizwa futhi ngokuthi Amandla Okuhle, okungukuthi "amandla amahle noma azinzile" .

isakhiwo kanye nesimiso

Isakhiwo kanye nomgomo wesenzo.
Isakhiwo sesilawuli somugqa somugqa we-LDO esiphansi sokuyeka ukuphuma sihlanganisa ikakhulukazi isekethe yokuqala, iyunithi yamanje yokuchema yomthombo wamanje, ukunika amandla isekethe, izingxenye zokulungisa, umthombo wereferensi, isikhulisi sephutha, inethiwekhi yokumelana nempendulo, isekethe yokuvikela, njll. Umgomo oyisisekelo wokusebenza uthi kanje: isistimu inikwe amandla, uma iphinikhodi yokunika amandla isezingeni eliphezulu, isifunda siqala ukuqala, isifunda somthombo wamanje sinikeza ukuchema kuwo wonke isifunda, futhi i-voltage yomthombo wereferensi isungulwa ngokushesha, ukuphuma kukhuphuka ngokuqhubekayo. ngokokufaka lapho okokukhiphayo sekuzofinyelela inani elishiwo, i-voltage yempendulo yokuphumayo etholwe yinethiwekhi yempendulo nayo iseduze nenani le-voltage eyireferensi, ngalesi sikhathi isikhulisi sephutha sizokhipha i-voltage yempendulo kanye ne-voltage yereferensi phakathi kwe-The encane. isignali yephutha iyakhuliswa, bese ikhuliswa ishubhu yokulungisa ekuphumeni, ngaleyo ndlela yakha impendulo engemihle ukuze kuqinisekiswe ukuthi i-voltage ephumayo izinzile kunani elishiwo.Ngokufanayo, uma i-voltage yokufaka ishintsha noma ukushintsha kwamanje okukhiphayo, le sekhethi ye-loop evaliwe izogcina i-voltage ephumayo ingashintshile.