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Ama-LDO ahlukaniswa njengama-LDO we-voltage ephumayo evumayo noma ama-LDO akhiphayo angalungile.i-positive voltage voltage LDOs (low dropout) abalawuli: sebenzisa i-transistor yamandla (ebizwa nangokuthi idivayisi yokudlulisa) njenge-PNP.le transistor ivumela ukugcwaliswa kwesimo ukuze isilawuli sibe ne-voltage ephansi kakhulu yokuyeka, ngokuvamile ezungeze u-200mV;okukhiphayo okunegethivu ama-LDO asebenzisa i-NPN njengedivayisi yayo yokudlulisa futhi asebenza ngemodi efanayo kuma-LDO okukhiphayo okuhle.Okukhiphayo okunegethivu i-LDO isebenzisa i-NPN njengedivayisi yayo yokudlulisa futhi isebenza ngemodi efanayo nedivayisi ye-PNP yokuphumayo okuhle kwe-LDO.

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Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Izimfanelo Zomkhiqizo

UHLOBO	DESCRIPTION
Isigaba	Izifunda Ezihlanganisiwe (ICs) I-PMIC Ama-Voltage Regulators - Linear
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)	5.2V
I-Voltage Dropout (Ubukhulu)	0.3V @ 2A
Okwamanje - Okukhiphayo	2A
I-PSRR	42dB ~ 25dB (10kHz ~ 500kHz)
Lawula izici	Nika amandla
Izici Zokuvikela	Ngaphezulu Kwezinga Lokushisa, Reverse Polarity
Izinga Lokushisa Lokusebenza	-40°C ~ 150°C (TJ)
Uhlobo Lokukhweza	INtaba Engaphezulu
Iphakheji / Ikesi	20-VFQFN Iphedi Eveziwe
Iphakheji Yedivayisi Yomhlinzeki	20-VQFN (3.5x3.5)
Inombolo Yomkhiqizo Eyisisekelo	I-TPS7A5201

Ukwahlukanisa

Ithiphu Elandisiwe: I-voltage ephumayo iwumehluko omncane phakathi kwe-voltage yokufaka kanye ne-voltage ephumayo edingekayo ukuze isilawuli sigcine i-voltage ephumayo ngaphakathi kuka-100mV ngaphezulu noma ngaphansi kwevelu yayo evamile.

Ukukhetha isixazululo

I-Boost ihlale iyisinqumo esihle se-DCDC, imali, noma ukukhetha i-DCDC noma i-LDO, ukuqhathanisa nezindleko, ukusebenza kahle, umsindo, nokusebenza.

❶ Uma ama-voltage okokufaka nawokukhiphayo aseduze, kungcono ukhethe isilawuli se-LDO, esingafinyelela ukusebenza kahle okuphezulu kakhulu.

Isibonelo: Izilawuli ze-LDO zivame ukusetshenziswa ezinhlelweni lapho i-lithium-ion battery voltage iguqulelwa ku-voltage ephumayo engu-3V.Nakuba u-10% wokugcina wamandla ebhethri engasetshenziswa, isilawuli se-LDO sisaqinisekisa isikhathi eside sokusebenza kwebhethri nomsindo ophansi.

❷Uma i-voltage yokufaka ne-voltage ephumayo ingasondeli kakhulu, cabanga nohlobo lokushintsha i-DCDC ngoba i-current input ye-LDO ilingana ne-output current.Uma ukwehla kwamandla kagesi kukukhulu kakhulu, amandla asetshenziswa ku-LDO makhulu kakhulu futhi ukusebenza kahle akuphezulu.

Izici zokulawula umugqa wendabuko

Izilawuli zomugqa ezivamile: ngokuvamile zidinga i-voltage yokufaka i-Uin ukuthi okungenani ibe ngu-2V~3V ngaphezu kwe-voltage ephumayo ethi Mayelana (njengochungechunge lwama-chips angu-78XX), ngaphandle kwalokho ngeke zisebenze kahle.Kodwa isimo esinjalo sinzima kakhulu.Uma i-5V ukuya ku-3.3V, umehluko we-voltage phakathi kokokufaka nokukhiphayo ungu-1.7V kuphela, ongahlangabezani nezimo zokusebenza zesilawuli somugqa ovamile.Ukwehla kwamandla kagesi kusilawuli esivamile somugqa sisebenzisa i-NPN compound power transistor cishe ku-2V.

Ngamandla e-MOS transistors kungenzeka ukunikeza i-voltage ephansi yokuyeka.Ngamandla e-MOS, ukwehla kwamandla kagesi kuphela kusilawuli kubangelwa ukumelana kwe-ON komthwalo wamanje wedivayisi yokunikeza amandla.Uma umthwalo umncane, ukwehla kwamandla kagesi okukhiqizwa ngale ndlela kungamamilivolthi ambalwa kuphela.

Okwedlule: Ukushintshanisa amandla okuthengisa ashisayo TPS4H160AQPWPRQ1 ic chip indawo eyodwa

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