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tsananguro pfupi:

MaLDO anoiswa seyakanaka kubuda voltage LDOs kana isina kunaka inobuda maLDO.positive output voltage LDOs (low dropout) regulators: shandisa simba transistor (inonziwo dhizha rekutamisa) sePNP.transistor iyi inobvumira saturation saka regulator anogona kuva yakaderera chaizvo dropout voltage, kazhinji kumativi 200mV;yakashata inobuda maLDO anoshandisa NPN semudziyo wayo wekutamisa uye inoshanda nenzira yakafanana kune yakanaka kubuda maLDO.Iyo yakashata yakabuda LDO inoshandisa NPN sechishandiso chayo chekufambisa uye inoshanda nenzira yakafanana kune PNP mudziyo weiyo yakanaka kubuda LDO.

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Product Detail

Product Tags

Product Attributes

TYPE	DESCRIPTION
Category	Integrated Circuits (ICs) PMIC Voltage Regulators - Linear
Mfr	Texas Instruments
Series	Motokari, AEC-Q100
Package	Tepi & Reel (TR) Cheka Tape (CT) Digi-Reel®
SPQ	3000 T&R
Product Status	Active
Output Configuration	Positive
Output Type	Adjustable
Nhamba yeVatongi	1
Voltage - Input (Max)	6.5V
Voltage - Kubuda (Mini/Yakagadziriswa)	0.8V
Voltage - Kubuda (Max)	5.2V
Voltage Dropout (Max)	0.3V @ 2A
Zvazvino - Output	2A
PSRR	42dB ~ 25dB (10kHz ~ 500kHz)
Kudzora Zvinhu	Enable
Dziviriro Features	Pamusoro peTemperature, Reverse Polarity
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Nyaya	20-VFQFN Yakafumurwa Pad
Supplier Device Package	20-VQFN (3.5x3.5)
Base Product Number	TPS7A5201

Classification

Yakawedzerwa Zano: Dropout voltage ndiwo musiyano udiki pakati peiyo voltage yekupinza uye yekubuda voltage inodiwa kuti regiretor ichengetedze inobuda voltage mukati me100mV pamusoro kana pazasi kukosha kwayo kwezita.

Kusarudza mhinduro

Boost inogara iri sarudzo yakanaka yeDCDC, buck, ingave yekusarudza DCDC kana LDO, kuenzanisa maererano nemutengo, kugona, ruzha, uye kuita.

❶ Kana iyo yekupinza uye yekubuda voltages iri padyo, zviri nani kusarudza LDO regulator, iyo inogona kuwana yakanyanya kushanda zvakanaka.

Muenzaniso: LDO regulators anowanzo shandiswa mumashandisirwo apo iyo lithium-ion bhatiri voltage inoshandurwa kuita 3V inobuda voltage.Kunyangwe iyo yekupedzisira 10% yesimba rebhatiri isingashandiswe, iyo LDO regulator ichiri kuona yenguva yakareba yekushanda kwebhatiri ine ruzha rwakadzika.

❷Kana magetsi ekuisa uye kubuda kwemagetsi asiri pedyo zvakanyanya, funga nezve switching type DCDC zvakare nekuti iyo yekuisa ikozvino yeLDO yakaenzana neinobuda ikozvino.Kana kudonha kwemagetsi kwakakurisa, simba rinodyiwa muLDO rakakura kwazvo uye kugona hakuna kukwirira.

Hunhu hwechinyakare linear regulators

Maconventional linear regulators: kazhinji inoda kuti voltage yekupinda Uin iite inosvika 2V ~ 3V yakakwira pane inobuda voltage About (se78XX nhevedzano yemachipisi), zvikasadaro haishande nemazvo.Asi mamiriro ezvinhu akadaro akaoma zvikuru.Kana 5V kusvika 3.3V, musiyano wevoltage pakati pekupinza uye kubuda ingori 1.7V chete, iyo isingasangane nemamiriro ekushanda eyakajairwa linear regulator.Kudonha kwayo kwemagetsi kune yakajairwa mutsara regulator uchishandisa NPN komputa simba transistor iri kutenderera 2V.

NeMOS simba transistors zvinokwanisika kupa yakaderera yekudonha voltage.Nesimba MOS, iyo chete voltage inodonha kuburikidza neregulator inokonzerwa neON kushorwa kwekuremerwa ikozvino kwemagetsi emagetsi.Kana mutoro wacho uri mudiki, kudonha kwemagetsi kunogadzirwa nenzira iyi kunongova makumi mashoma emamilivolts.

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