1. Cov zis hluav taws xob
Cov zis hluav taws xob yog qhov tseem ceeb tshaj plaws ntawm qhov qis qis qis qis qis qis, thiab nws tseem yog thawj qhov ntsuas uas cov kws tsim khoom siv hluav taws xob yuav tsum xav txog thaum xaiv tus tswj hwm. Low dropout linear regulators muaj nyob rau hauv cov zis hluav taws xob ruaj khov thiab kho qhov tso zis voltage hom. Qhov tso zis hluav taws xob ruaj khov yog qhov yooj yim dua rau kev siv, thiab vim tias qhov tso zis hluav taws xob tau raug kho los ntawm cov chaw tsim khoom, cov regulator muaj qhov siab. Txawm li cas los xij, qhov teeb tsa qhov hluav taws xob qhov hluav taws xob yog tag nrho cov txiaj ntsig zoo sib xws, uas tsis tuaj yeem ua tau raws li txhua daim ntawv thov, tab sis qhov kev hloov pauv ntawm tus nqi ntawm cov khoom siv sab nraud yuav cuam tshuam rau kev ruaj ntseg raug.
2. Cov zis siab tshaj plaws tam sim no
Lub zog ntawm cov khoom siv hluav taws xob sib txawv, thiab qhov siab tshaj plaws tam sim no xav tau los ntawm qhov hluav taws xob stabilizer kuj txawv. Feem ntau, regulators nrog cov zis ntau dua tam sim no raug nqi ntau dua. Txhawm rau txo tus nqi, hauv cov khoom siv hluav taws xob uas tsim los ntawm ntau qhov hluav taws xob stabilizer, qhov tsim nyog voltage stabilizer yuav tsum raug xaiv raws li tus nqi tam sim no xav tau los ntawm txhua qhov chaw.
3. Cov tswv yim thiab cov zis voltage sib txawv
Lub input-output voltage sib txawv yog qhov tseem ceeb tshaj plaws parameter ntawm lub low-dropout linear regulator. Nyob rau hauv cov xwm txheej hais tias qhov tso zis voltage yog guaranteed kom ruaj khov, qhov qis dua qhov voltage dropout, qhov zoo dua ntawm cov linear regulator. Piv txwv li, ib tug 5.0V qis dropout linear regulator muaj peev xwm stabilize qhov tso zis voltage ntawm 5.0V tsuav yog qhov input voltage yog 5.5V.
4. Hauv av tam sim no
Lub hauv paus Circuit Court IGND hais txog kev ua haujlwm tam sim no ntawm tus tswj hwm muab los ntawm cov khoom siv hluav taws xob thaum cov zis tam sim no ntawm cov tswj hwm series yog xoom. Qhov tam sim no qee zaum hu ua quiescent tam sim no, tab sis thaum PNP transistor siv los ua cov khoom sib tw, lub npe kev cai no tsis raug. Feem ntau zoo tagnrho tsis tshua muaj hluav taws xob hluav taws xob regulators muaj me ntsis hauv av tam sim no.
5. Kev cai thauj khoom
Cov kev cai thauj khoom tuaj yeem txhais tau los ntawm daim duab 2-1 thiab Equation 2-1. Qhov me me ntawm kev tswj hwm tus nqi ntawm LDO, qhov muaj zog LDO lub peev xwm los cuam tshuam cov kev cuam tshuam.