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2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
PMOS. Lub PMOS transistor muaj qhov tsis txaus ntseeg tam sim no thiab tsuas yog qhov poob tawm qhov hluav taws xob yog nws qhov chaw-drain saturation voltage. Yog li ntawd, cov no yog siv nyob rau hauv LDO regulators. Raws li nyob rau hauv cov ntaub ntawv ntawm PNP transistor, lub load yog txuas mus rau ib tug high-impedance node (lub ntws) thiab cov regulator tsis ruaj khov.
Vim li cas PMOS siv hauv LDO?
Qhov kev tso tawm hluav taws xob rau PMOS LDOs yog sib npaug rau cov zis tam sim no lub sij hawm Rds(on) ntawm MOSFET. … Hauv cov ntawv thov tam sim no qis dua, PMOS LDOs feem ntau muaj VDO qis dua li ntawm PNP LDOs. Daim duab 2 suav nrog qhov poob qis ntawm PNP LDO nrog PMOS LDO.
Lub caij twg yog qhov tsim nyog rau kev ua haujlwm qis qis ntawm LDO thiab vim li cas?
Lub caij dhau mus hauv LDO yog lub luag haujlwm rau kev hloov pauv tam sim no los ntawm kev nkag mus rau kev thauj khoom thiab raug tsav los ntawm qhov yuam kev amplifier hauv cov lus tawm tswv yim. MOSFETs (ob leeg PMOS thiab NMOS) feem ntau yog siv los ua cov ntsiab lus dhau. Cov duab hauv qab no qhia txog LDO layout nrog PMOS pass element.
Dab tsi yog qhov txawv ntawm LDO thiab linear regulator?
Ib qho LDO regulator yog linear regulator uas muaj peev xwm ua hauj lwm ntawm ib qho tsis tshua muaj peev xwm sib txawv ntawm cov tswv yim thiab cov zis voltage. Lub tshuab hluav taws xob tawm yog hom hluav taws xob IC uas tuaj yeem tso tawm qhov hluav taws xob tsis tu ncua los ntawm qhov hluav taws xob nkag thiab siv ntau yam khoom siv hluav taws xob.
Dab tsi ua lub luag haujlwm tseem ceebnyob rau hauv stabilizing cov zis ntawm LDO?
Qhov nce ntxiv los ntawm yuam kev amplifier pab txo qis kev tswj hwm ntawm LDO. … Qhov yuam kev amplifier ua lub luag haujlwm tseem ceeb kom ruaj khov tus nqi tso zis thaum lub sijhawm ncua.
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