UC2843BD1013TR ic chip edityanisiweyo yesekethe ye-elektroniki semiconductor entsha kunye neyokuqala indawo enye yokuthenga

1.I-LDO, okanye i-low dropout regulator, isilawuli esisezantsi sokuyeka ukuphuma usebenzisa i-transistor okanye ityhubhu yempembelelo yasendle (FET) esebenza kwindawo yayo yokuhlutha ukukhupha amandla ombane agqithileyo kumbane osetyenziswayo wokufaka umbane ukuvelisa amandla ombane amiselweyo.
Izinto ezine eziphambili ziyi-Dropout, Ingxolo, i-Power Supply Rejection Ratio (PSRR), kunye ne-Quiscent Current Iq.
Amacandelo aphambili: isiphaluka sokuqala, iyunithi ye-bias eqhubekayo yangoku, isiphaluka esivumelayo, i-elementi yokulungelelanisa, umthombo wereferensi, i-amplifier yephutha, inethiwekhi ye-resistor yempendulo kunye nesekethe yokukhusela, njl.

2.Umgaqo wokuSebenza
Isekethe ye-LDO esisiseko iquka uthotho lwe-VT yokulawula, iisampulu ezixhathisa i-R1 kunye ne-R2, kunye neamplifier yokuthelekisa A.
Inkqubo inikwe amandla, ukuba i-pin yokuvumela ikwinqanaba eliphezulu, isekethe iqala, isekethe yomthombo wangoku eqhubekayo ibonelela ngokungathathi hlangothi kuyo yonke isekethe, i-voltage yomthombo wereferensi isekwe ngokukhawuleza, kwaye i-voltage yegalelo engalawulwayo isetyenziswa njengombane. Ubonelelo lwamandla, umbane wereferensi usetyenziswa njengenqanaba lokufaka umbane ongalunganga weamplifier yempazamo, inethiwekhi yengxelo echasayo yahlula umbane ophumayo kwaye ifumana amandla ombane wengxelo, lo mbane wengxelo ufaka igalelo kwisiphelo sendlela enye yesithelekisi sempazamo, kunye ne-negative Le voltage yempendulo igalelo kwicala le-isotropic le-comparator yempazamo kwaye ithelekiswa ne-voltage yereferensi engalunganga.Umahluko phakathi kwee-voltages ezimbini ukhuliswe yi-amplifier yephutha ukulawula ngokuthe ngqo isango lesici sokulungelelanisa amandla, kwaye imveliso ye-LDO ilawulwa ngokutshintsha imeko yokuqhubela umbhobho wokulungelelanisa, oko kukuthi i-Vout = (R1 + R2) / R2 × Vref
Olona lawulo lomgca wokuphuma olusezantsi lukwanayo neminye imisebenzi efana nokukhuselwa kombane omfutshane, ukuvalwa kwe-overvoltage, ukuvalwa kwe-thermal, ukukhuselwa kokubuyela umva, njl.

3.Izinto eziluncedo, izinto ezingeloncedo, kunye nesimo sangoku
I-Low Dropout Voltage (i-LDO) i-linear regulators inexabiso eliphantsi, ingxolo ephantsi, i-low quiescent current, amacandelo ambalwa angaphandle, ngokuqhelekileyo i-capacitor enye okanye ezimbini ze-bypass, kwaye zinesandi esiphantsi kakhulu kunye ne-Power Supply Rejection Ratio (PSRR).I-LDO yiNkqubo encinci kwi-Chip (i-SoC) ene-self-consumption ephantsi kakhulu.Ingasetyenziselwa ulawulo oluphambili lwangoku kwaye ineesekethe ezidibeneyo ze-hardware ezifana ne-MOSFETs ephantsi kakhulu kwi-line-resistance, i-Schottky diode, i-resistors yesampuli, kunye nezahluli zombane, kunye nokukhuselwa kwangoku, ukukhuselwa kobushushu obungaphezulu, Imithombo yereferensi echanekileyo, i-amplifiers umahluko, abalibazisi, njl. njl .Ii-LDO ezininzi zifuna i-capacitor enye kuphela kwigalelo kunye nenye kwimveliso yokusebenza okuzinzileyo.
Ii-LDO ezintsha zinokufikelela ezi nkcukacha zilandelayo: ingxolo yemveliso ye-30µV, i-PSRR ye-60dB, i-quent current ye-6µA, kunye nokuhla kwamandla ombane we-100mV kuphela.Esona sizathu siphambili sale ntsebenzo iphuculweyo ye-LDO yabalawuli bemigca ye-LDO kukuba umlawuli osetyenzisiweyo yi-P-channel MOSFET, eqhutywa yi-voltage kwaye ayifuni okwangoku, ukunciphisa okwangoku okusetyenziswe sisixhobo ngokwaso kunye nokuhla kwamandla ombane kuwo wonke.Ukuwisa kuphantse kulingane nemveliso yemveliso yangoku kunye nokumelana nokumelana.Ukuhla kwamandla ombane kwi-MOSFET kuphantsi kakhulu ngenxa yokunganyangeki kwayo.Abalawuli abaqhelekileyo abasebenzisa i-PNP transistors.Kwiisekethe ezine-PNP transistors, ukuhla kwe-voltage phakathi kwegalelo kunye nemveliso akufanele kube phantsi kakhulu ukuthintela i-PNP transistor ukuba ingene kwi-saturation kunye nokunciphisa amandla okuphuma.