Isevisi ye-One Stop SON8 TPS7A8101QDRBRQ1 EnamaChips Oqobo Futhi Amasha E-IC Electronics
Izimfanelo Zomkhiqizo
| UHLOBO | DESCRIPTION |
| Isigaba | Izifunda Ezihlanganisiwe (ICs) |
| Mfr | Texas Instruments |
| Uchungechunge | Ezezimoto, AEC-Q100 |
| Iphakheji | I-Tape & Reel (TR) Cut Tape (CT) I-Digi-Reel® |
| SPQ | 3000 T&R |
| Isimo somkhiqizo | Iyasebenza |
| Ukucushwa Kokukhiphayo | Okuhle |
| Uhlobo Lokukhiphayo | Kuyalungiseka |
| Inombolo Yabalawuli | 1 |
| I-Voltage - Okokufaka (Ubukhulu) | 6.5V |
| I-Voltage - Okukhiphayo (Okuncane/Okulungisiwe) | 0.8V |
| I-Voltage - Okukhiphayo (Ubukhulu) | 6V |
| I-Voltage Dropout (Ubukhulu) | 0.5V @ 1A |
| Okwamanje - Okukhiphayo | 1A |
| Okwamanje - Quescent (Iq) | 100µA |
| Okwamanje - Ukunikezwa (Ubukhulu) | 350µA |
| I-PSRR | 48dB ~ 38dB (100Hz ~ 1MHz) |
| Lawula izici | Nika amandla |
| Izici Zokuvikela | Ngaphezulu Kwamanje, Ngaphezu Kwezinga Lokushisa, I-Reverse Polarity, Ngaphansi Kwe-Voltage Lockout (UVLO) |
| Izinga Lokushisa Lokusebenza | -40°C ~ 125°C (TJ) |
| Uhlobo Lokukhweza | INtaba Engaphezulu |
| Iphakheji / Ikesi | I-8-VDFN Exposed Pad |
| Iphakheji Yedivayisi Yomhlinzeki | 8-INDODANA (3x3) |
| Inombolo Yomkhiqizo Eyisisekelo | I-TPS7A8101 |
I-LDO, noma isilawuli esiphansi sokuyeka ukuphuma, isilawuli somugqa sokuyeka esiphansi esisebenzisa i-transistor noma ishubhu lomphumela wenkundla (FET) elisebenza endaweni yaso yokukhipha amandla ukuze likhiphe i-voltage eyeqile ku-voltage yokufaka esetshenzisiwe ukuze kukhiqizwe i-voltage ephumayo elawulwayo.
Izinto ezine eziyinhloko yi-Dropout, Noise, Power Supply Rejection Ratio (PSRR), kanye ne-Quiscent Current Iq.
Izingxenye eziyinhloko: isekethe yokuqala, iyunithi yokuchema yomthombo wamanje engaguquki, isekethe evumelayo, isici sokulungisa, umthombo wereferensi, isikhulisi samaphutha, inethiwekhi yokumelana nempendulo kanye nesekhethi yokuvikela, njll.
Isimiso sokusebenza
Isifunda esiyisisekelo se-LDO siqukethe isilawuli se-VT sochungechunge, izihluthulelo zesampula i-R1 ne-R2, kanye ne-amplifier yokuqhathanisa A.
Isistimu inikwe amandla, uma iphinikhodi yokunika amandla isezingeni eliphezulu, umjikelezo uyaqala, isifunda somthombo wamanje esihlala sikhona sinikeza ukuchema kuyo yonke isekethe, i-voltage yomthombo wereferensi isungulwa ngokushesha, futhi i-voltage yokufaka engalawulwa isetshenziswa njenge-voltage. kokunikezwa kwamandla, i-voltage eyireferensi isetshenziswa njenge-voltage yesigaba esingesihle se-amplifier yephutha, inethiwekhi yempendulo ye-resistor ihlukanisa i-voltage ephumayo futhi ithola i-voltage yempendulo, le voltage yempendulo ifaka endaweni efanayo yesiqhathanisi samaphutha, kanye nenegethivu Le voltage yempendulo ifaka ohlangothini lwe-isotropic lwesiqhathanisi sephutha futhi iqhathaniswa ne-voltage eyireferensi engalungile.Umehluko phakathi kwama-voltages amabili ukhuliswa yi-amplifier yephutha ukuze ulawule ngokuqondile isango lesici sokulungiswa kwamandla, futhi ukukhishwa kwe-LDO kulawulwa ngokushintsha isimo sokuqhuba ishubhu yokulungisa, okungukuthi i-Vout = (R1 + R2)/ I-R2 × Isif
Isilawuli somugqa sangempela sokuphuma esiphansi sineminye imisebenzi efana nokuvikela isekethe emfushane yokulayisha, ukuvala shaqa kwe-overvoltage, ukuvala shaqa okushisayo, ukuvikela ukuhlehla kokuxhumeka, njll.
Izinzuzo, ukungalungi, nesimo samanje
Izilawuli zomugqa ze-Low Dropout Voltage (LDO) ziyizindleko eziphansi, umsindo ophansi, amandla athule aphansi, izingxenye zangaphandle ezimbalwa, ngokuvamile i-bypass capacitor eyodwa noma ezimbili, futhi zinomsindo ophansi kakhulu kanye ne-Power Supply Rejection Ratio (PSRR).I-LDO iyiSistimu encane ku-Chip (SoC) enokuzisebenzisa okuphansi kakhulu.Ingasetshenziselwa ukulawulwa kwesiteshi esikhulu samanje futhi inamasekhethi ezingxenyekazi zekhompuyutha adidiyelwe njengama-MOSFET ane-in-line ukumelana okuphansi kakhulu, ama-Schottky diode, ama-resistors amasampula, nama-voltage dividers, kanye nokuvikela okungaphezu kwamanje, ukuvikela izinga lokushisa elingaphezu kwamandla, Imithombo yereferensi enembile, izikhulisa-msindo ezihlukile, izilibazisi, njll. I-PG isizukulwane esisha se-LDO esizihlola ngokwakho isimo ngasinye sokukhiphayo kanye nokubambezeleka kokunikezwa kwamandla okuphephile, okungaphinde kubizwe ngokuthi Amandla Alungile, okungukuthi "amandla amahle noma azinzile" .Ama-LDO amaningi adinga i-capacitor eyodwa kuphela kokokufaka kanye neyodwa ekuphumeni ukuze kusebenze okuzinzile.
Ama-LDO amasha angakwazi ukufeza ukucaciswa okulandelayo: umsindo ophumayo ongu-30µV, i-PSRR ka-60dB, i-quocent current engu-6µA, kanye nokwehla kwamandla kagesi okungu-100mV kuphela.Isizathu esiyinhloko salokhu kusebenza okuthuthukisiwe kwezilawuli zomugqa we-LDO ukuthi isilawuli esisetshenzisiwe yi-P-channel MOSFET, eshayelwa yi-voltage futhi ayidingi yamanje, inciphisa amandla amanje asetshenziswa idivayisi ngokwayo kanye nokwehla kwamandla kagesi kuwo wonke.ukwehla kucishe kulingane nomkhiqizo wokuphumayo kanye nokumelana nokumelana.Ukwehla kwamandla kagesi kuyo yonke i-MOSFET kuphansi kakhulu ngenxa yokumelana kwayo okuphansi.Izilawuli zomugqa ezijwayelekile zisebenzisa ama-PNP transistors.Kumasekhethi anama-PNP transistors, ukwehla kwamandla kagesi phakathi kokufaka nokuphumayo akumele kube phansi kakhulu ukuze kuvinjwe i-PNP transistor ukuthi ingene ekugcwalisweni kanye nokunciphisa amandla okukhiphayo.
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