I-STMicroelectronics Low-Dropout LDO Linear Voltage Abalawuli
Ulwazi Lomkhiqizo
I-Low-dropout (LDO) ivolumu yomugqatagama-e regulators ayizingxenye ezibalulekile cishe kuwo wonke amasekethe. Banikeza indlela elula nesebenzayo yonjiniyela ukunciphisa ivolumu yokufakatage kweyodwa efanele isicelo esiseduze. Ama-LDO ayatholakala ekucushweni kokukhishwa okungaguquki, okuvumela unjiniyela ukuthi ashiye izinto eziphikisayo, futhi ezinye zisebenza ngaphandle kwama-capacitor angaphandle nhlobo.
Ubuchwepheshe obusha nezixazululo ezintsha zivumela ukukhiqiza ama-LDO ngamasayizi amancane, njenge-ST ST engenabumpless.AMPTM (0.47 x 0.47 mm) amaphakheji. Ama-LDO asebenza kahle ekuhlungeni umsindo wokuphakelwa kwamandla, okuvumela imithwalo engezwani nomsindo ukuthi isebenze kahle. Ukuzithengela okuphansi kulungele izinhlelo zokusebenza eziphathwayo nezinamandla ebhethri lapho igagasi elincane elithule lingenza umehluko omkhulu ngokuphathelene nempilo yebhethri yohlelo lokusebenza.
Ukuphuma kancane (LDO) ivolumu yomugqatagama-e regulators ayizingxenye ezibalulekile cishe kuyo yonke isekethe. Banikeza onjiniyela indlela elula nesebenzayo yokuklama yokunciphisa ivolumu yokufakatage kweyodwa efanele isicelo esiseduze.
Lo mhlahlandlela uhlinzeka onjiniyela nge-overview yezilawuli zethu ezivame ukusetshenziswa kakhulu zokushiya phansi futhi zizozisiza ukukhomba isisombululo esifanele kakhulu kuhlobo ngalunye lohlelo lokusebenza.
Izinzuzo Eziyinhloko ze-LDOS
- Ukusebenziseka kalula
- Usayizi omncane
- I-PSRR ephezulu kanye Nomsindo Ophansi
- Amandla aphansi athule
- Inika amandla imithwalo ebucayi
Ungayikhetha kanjani i-LDO elungile yohlelo lokusebenza
Indlela ejwayelekile yokukhetha i-LDO iwukufanisa indlela yokunquma ngale ndlela elandelayo:
- Umphumela voltage ukunemba
- Umphumela voltage umsindo
- Layisha impendulo yesikhashana
- I-Quiscent current
- Ivolumu yokuyekatage
- Umkhawulo ophumayo wamanje
- Ukusebenza okushisayo
Imiyalo yokusetshenziswa komkhiqizo
Lapho ukhetha i-LDO, landela indlela evamile eshiwo ngenhla ukuze uhambisane nemibandela ngohlelo olusohlwini. Ngokusekelwe ezidingweni zohlelo lokusebenza, khetha i-LDO efanele enevolumu oyifunayotage, umsindo, ukuphendula kwesikhashana komthwalo, i-current ethule, ivolumu yokuyeka ukuphumatage, inani eliphezulu lokukhishwayo kwamanje, nokusebenza okushisayo. Ama-LDO asebenziseka kalula futhi adinga ama-capacitor amabili kuphela nama-resistors amabili kumasekhethi amaningi. Amanye ama-LDO angasebenza ngaphandle kwanoma yimaphi ama-capacitor angaphandle noma izihlungi.
I-ultra-low-dropout voltagi-e inweba isikhathi sokuphila samadivayisi asebenza ngebhethri, njengoba ivumela i-LDO ukuthi igcine okukhiphayo okuphezulu kwamanje noma ngabe ibhethri linomthamo omkhulu.tage iyancishiswa njengoba ibhethri liphuma. Ngaphezu kwalokho, kunciphisa ukuchithwa kwamandla. Ama-LDO alungele izinhlelo zokusebenza eziphathwayo nezinamandla ebhethri lapho igagasi elincane elithule lingenza umehluko omkhulu ngokuphathelene nokuphila kwebhethri yohlelo lokusebenza. Ama-LDO asebenza kahle ekuhlungeni umsindo wokuphakelwa kwamandla, okuvumela imithwalo engezwani nomsindo ukuthi isebenze kahle.
YIZIPHI IZINZUZO EZINGENHLOKO ZE-LDOS?
Ukusebenziseka kalula
Ukusebenzisa ama-LDO ukulawula umthamotage lula njalo. Ukwengeza i-LDO kunoma iyiphi isekethe kudinga ama-capacitor amabili kuphela nama-resistors amabili kakhulu. Iningi lama-ST's LDO ayatholakala ekucushweni kokukhishwa okungaguquki, okuvumela unjiniyela ukuthi ashiye izimbangi, futhi amanye aze asebenze ngaphandle kwama-capacitor angaphandle nhlobo.
Usayizi omncane
Ubuchwepheshe obusha nezixazululo ezintsha zivumela ukukhiqiza ama-LDO ngamasayizi amancane, njenge-ST ST yethu engenabumpless.AMP™
(0.47 x 0.47 mm) amaphakheji.
I-PSRR ephezulu kanye Nomsindo Ophansi
Amadivayisi ezicelo ze-RF, ukuguqulwa kwedatha, ukunakekelwa kwezempilo kanye nokucubungula amasignali kuvame ukuba sengozini yomsindo. Ngenkathi inhloso eyinhloko ye-LDO iwukulawula ivolumutages, indlela ama-LDO asebenza ngayo futhi iwenza asebenze kahle ekuhlungeni umsindo wokunikezwa kwamandla, okuvumela imithwalo ezwelayo ukuthi isebenze kahle.
Amandla aphansi athule
Ukuzithengela okuphansi kulungele izinhlelo zokusebenza eziphathwayo nezinamandla ebhethri lapho igagasi elincane elithule lingenza umehluko omkhulu ngokuphathelene nempilo yebhethri yohlelo lokusebenza. Ama-LDO we-ST's ultra-low quiescence LDO agcina ukusebenza okuhle kakhulu okuguquguqukayo futhi atholakala kumaphakheji ahlukahlukene anezinyawo ezincane.
Inika amandla imithwalo ebucayi
Izidingo zokuhlinzekwa kwamasekhethi edijithali, njengama-microprocessors, izinkumbulo ezishumekiwe kanye namadivayisi okucubungula amasignali edijithali, ahlala ephushwa ukuze anciphise ivolumu.tage amazinga, kuyilapho ukubekezelelana kuqina. Ukugcina ivolumu enembile yokuphumayotage, ngenkathi nokugcina ezinye izici ezibalulekile kubalulekile lapho ukhetha i-LDO yalezi zinhlelo zokusebenza. 
UKUKHETHA UKUSEBENZA OKUPHEZULU
Ukuyeka okuphansi kakhulu
I-dropout voltagu-e umehluko omncane ochaziwe phakathi kwevolumu yokufakatage kanye nevolumu oyifunayotage kokuphumayo okucacisiwe kwamanje. I-ultra-low-dropout voltagi-e inweba isikhathi sokuphila samadivayisi asebenza ngebhethri, njengoba ivumela i-LDO ukuthi igcine okukhiphayo okuphezulu kwamanje noma ngabe ibhethri linomthamo omkhulu.tage iyancishiswa njengoba ibhethri liphuma.
Ngaphezu kwalokho, kunciphisa ukuchithwa kwamandla.
| I-LD57100 |
| I-LDL112 |
| I-LD39200 |
| I-LD39115J |
| I-LDCL015 |
Amandla aphansi athule
I-Quiscent current eyamanje esetshenziswa ukunika amandla ukujikeleza kwangaphakathi kwe-LDO. Ama-LDO anamanzi athule aphansi abalulekile ekugcineni ukusebenza kahle nokwelula impilo yebhethri, futhi ayinketho yemvelo yezinhlelo zokusebenza ezinezikhathi zokulinda ezinwetshiwe.
| I-STLQ50/015/020 |
| ST715/LDK715 |
| ST730 / ST732 |
| I-LD39100 / LD49100 |
| I-LD39115J |
| I-LDLN025 |
I-PSRR ephezulu/Umsindo ophansi
I-PSRR iyisilinganiso sekhono le-LDO lokubekezelela ivolumu yokufaka eguqukayotage ngaphandle kokukuvumela ukuthi kuthinte okukhiphayo, kuyilapho ama-LDO anomsindo ophansi aklanyelwe ukunciphisa umsindo wangaphakathi.
Ukugcina umthamo olindelekile wokukhiphayotagi-e enembayo ephezulu nomsindo ophansi ibalulekile uma unika amandla amadivayisi azwelayo noma lapho umthamo wokunikezelatage ithathwe emthonjeni onomsindo.
| I-LDLN015/025/030 |
| LD39015/020/030 |
| I-LD56020 |
| I-LD3985 |
| I-LDBL20 |
| I-LD59015 |
| I-LDLN050 |
UHLU LWEZINHLOKO
- Ukunemba - Ukuchezuka okuphezulu kokuphumayo okushiwo. Ukunemba kwegama kungathinteka yizici ezifana nezingxenye zokubekezelela okuphansi, izinga lokushisa nokuhluka komthwalo. Ivame ukucashunwa kuwo wonke amabanga okushisa, ngezinye izikhathi ichazwa ngokuthi Ukubekezelela.
- I-AEC-Q100 - Noma iyiphi isekethe edidiyelwe idinga ukuhlolwa ukuthobela izindlela zokuhluleka/ukuhlolwa kokucindezeleka njengoba kuchazwe ku-AEC-Q100 ngaphambi kokuthi ithengiswe njengedivayisi yezinga lezimoto.
- Ukuchema voltage (Vbias) - Isitimela samandla sangaphandle sidingeka ngamanye ama-LDO. Kuhlotshaniswa nevolumu ephansi yokuyekatages kanye nezici ezinhle kakhulu zomsindo.
- Ivolumu yokuyekatage - Ivolumu yokuyekatagu-e uyisilinganiso somehluko omncane kakhulu phakathi kwevolumu yokufaka neyokukhiphayotages. Ukwehla okuphansi kuvumela ukulawula okusebenzayo futhi kungasetshenziswa ukukhulisa impilo yonke yamadivayisi asebenza ngebhethri.
- Nika amandla/Vimba (EN/INH) – Ukunika amandla kwangaphandle (noma ukukhubaza) ukujikeleza kwangaphakathi lapho isilawuli singadingeki kunciphisa ukusetshenziswa kwamanje futhi kungandisa impilo yebhethri.
- Inethiwekhi yempendulo - Ama-Resistors asetshenziselwa ukusetha ivolumu edingekayotage kusilawuli somugqa. Kuzilawuli zokuphuma ezigxilile, lezi sezivele zishumekwe ngaphakathi kwe-chip ngokwayo.
- I-Line Regulation - Ukulawulwa komugqa kuchaza ukuthi isilawuli singayigcina kanjani ivolumu yayo ehlosiwetage unikezwe ushintsho ku-voltage yokufakatage.
- Ukulawulwa Komthwalo - Ukulawulwa komthwalo kuchaza ikhono lomlawuli lokugcina okukhiphayo okushiwo uma kubhekwa ushintsho kuzimo zomthwalo (okukhiphayo).
- Umsindo – Ikakhulukazi umsindo odalwa ireferensi ye-bandgap yangaphakathi ye-LDO, okungukuthi ampikhonjisiwe kunethiwekhi yempendulo. Izibalo zomsindo ezinhle zibalulekile kumasekhethi ekuxhumaneni okungenantambo noma ancike kumasignali wewashi anesivinini esikhulu.
- Iphakheji - Usayizi wokupakisha uwukuvumelana phakathi kosayizi nezakhiwo ezishisayo. Iphakheji elincane, lisengozini kakhulu ekuzishiseni ngokwakho. Amanye amaphakheji amakhulu adalule amaphedi ensimbi ukuze ahambise ukushabalala okushisayo ku-PCB, okuvumela ukupholisa okuthuthukisiwe kokwenziwayo.
- I-Pas Element - I-voltagUmthethonqubo we-e wenziwa ngokusebenzisa i-variable voltage esangweni le-MOSFET, elenza lisebenze ngendlela efanayo ne-resistor eguquguqukayo. Le transistor ijwayele ukubizwa nge-Pas Element.
- Ukuchithwa kwamandla - Uma i-voltage ilawulwa, amandla engeziwe ahlakazwa njengokushisa. Njengoba ukushisa kungathinta i-LDO nezinye izingxenye kabi, futhi ekugcineni kubangele ukungasebenzi kahle noma ukuvalwa kokushisa, ukuphatha okushisayo kubalulekile.
- I-Power Good (PG) - Lesi siginali ikhombisa ukuthi okukhiphayo kusemthethweni. Iwusizo ekulandeleleni amandla, ukusetha kabusha ukucupha, nokuningi.
- I-PSRR - I-Power Supply Rejection Ratio, isilinganiso sekhono le-LDO lokuhlunga ama-ripples anomsindo kuvolthi yokufakatage. Ihlala icaciswa ku-dB, futhi njalo ngaphezu kwebanga lamafrikhwensi.
- I-Quiscent current - I-current esetshenziswa isilawuli ukuze isebenze ukujikeleza kwangaphakathi. Ukwehlisa umoya othule kubalulekile ikakhulukazi ezixazululweni ezisebenza ngebhethri.
- I-Soft Start (SS) - I-Soft Start iwukukhuphuka okulawulwayo kancane kancane kokuphuma kwamandla, okuvimbela amaza amakhulu angenayo angalayisha kakhulu ukunikezwa kwamandla.
- Ukuvalwa kwe-thermal - Umsebenzi wokuvikela ovala idivayisi ukuvimbela umonakalo ekushiseni ngokweqile.
- Impendulo yesikhashana – Incazelo yekhono lesilawuli lokumelana nezinguquko ezisheshayo, ezaziwa ngokuthi ezedlulayo, ezimweni zokulayisha nezokuphakela. Bheka Ulayini Odlulayo kanye Nomthwalo Odlulayo.
Ukuze uthole ulwazi olwengeziwe vakashela ku- www.st.com/ldo
CONTACT
I-EBV Elektronik GmbH & Co. KG
I-D-85586 Poing
Im Technologiepark 2-8
Ucingo: +49 (0)8121 774-0
Ifeksi: +49 (0)8121 774-422
Amadokhumenti / Izinsiza
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I-STMicroelectronics Low-Dropout LDO Linear Voltage Abalawuli [pdf] Umhlahlandlela Womsebenzisi I-Low-Dropout LDO Linear Voltage Izilawuli, LDO Linear Voltage Izilawuli, Linear Voltage Abalawuli, Umqtage Abalawuli, Abalawuli |