STMicroelectronics Low-Dropout LDO Linear Voltage Masu Gudanarwa

Bayanin samfur

Low-dropout (LDO) madaidaiciya voltage regulators su ne muhimman abubuwa a kusan kowace da'ira. Suna ba da hanya mai sauƙi kuma mai tasiri ga injiniyoyi don rage shigar da voltage zuwa wanda ya dace da aikace-aikacen da ke hannun. Ana samun LDOs a cikin ƙayyadaddun ƙayyadaddun kayan aiki, yana barin injiniyan ya bar resistors, kuma wasu suna aiki ba tare da wani capacitors na waje kwata-kwata ba.
Sabbin fasahohi da sabbin hanyoyin magance su suna ba da izinin samar da LDOs a cikin ƙananan masu girma dabam, kamar ST ST mara ƙarfi.AMPTM (0.47 x 0.47 mm) fakiti. LDOs suna aiki yadda ya kamata wajen tace amo mai samar da wutar lantarki, yana ba da damar amo mai ɗaukar nauyi yin aiki da kyau. Ƙarƙashin amfani da kai yana da kyau don aikace-aikacen šaukuwa da baturi inda ƙaramin motsi na yanzu zai iya yin babban bambanci dangane da rayuwar baturin aikace-aikacen.

Ƙarƙashin fitarwa (LDO) madaidaiciya voltage regulators su ne muhimman sassa a kusan kowace da'ira. Suna ba wa injiniyoyi hanya mai sauƙi da ƙira mai inganci don rage shigar voltage zuwa wanda ya dace da aikace-aikacen da ke hannun.
Wannan jagorar tana ba wa masu haɓakawa abin ƙarewaview na mu mafi yawan amfani da ƙananan abubuwan sarrafawa kuma zai taimaka musu gano mafita mafi dacewa ga kowane nau'in aikace-aikacen.

Babban Fa'idodin LDOS

1. Sauƙin amfani
2. Ƙananan girma
3. Babban PSRR da ƙaramar amo
4. Ƙarancin halin yanzu
5. Ƙarfafa nauyi mai ƙarfi

Yadda ake Zaɓi LDO Dama don Aikace-aikace

Hanyar gama gari don zaɓar LDO shine daidaita ma'auni a cikin tsari mai zuwa:

1. Fitarwa voltage daidaito
2. Fitarwa voltage surutu
3. Load da martani na wucin gadi
4. Quiescent halin yanzu
5. Fitar da voltage
6. Matsakaicin fitarwa na halin yanzu
7. Ayyukan thermal

Umarnin Amfani da samfur

Lokacin zabar LDO, bi tsarin gaba ɗaya da aka ambata a sama don daidaita ma'auni a cikin tsari da aka jera. Dangane da buƙatun aikace-aikacen, zaɓi LDO mai dacewa tare da fitarwar da ake sotage, amo, mayar da martani na wucin gadi, jujjuyawar halin yanzu, dropout voltage, matsakaicin fitarwa na yanzu, da aikin zafi. LDOs suna da sauƙin amfani kuma suna buƙatar capacitors guda biyu kawai da resistors guda biyu don yawancin da'irori. Wasu LDO na iya aiki ba tare da wani capacitors na waje ko resistors ba.

ultra-low-dropout voltage yana ƙara tsawon rayuwar na'urori masu sarrafa baturi, saboda yana ba LDO damar kula da babban fitarwa na yanzu koda lokacin da baturi ya tashi.tage yana raguwa yayin da baturi ya ƙare. Bugu da ƙari kuma, yana rage ƙarfin wutar lantarki. LDOs suna da kyau don aikace-aikacen šaukuwa da baturi inda ƙaramin ƙaramar halin yanzu zai iya yin babban bambanci dangane da rayuwar baturin aikace-aikacen. LDOs suna aiki yadda ya kamata wajen tace amo mai samar da wutar lantarki, yana ba da damar amo mai ɗaukar nauyi yin aiki da kyau.

MENENE BABBAN AMFANIN LDOS?

Sauƙin amfani
Amfani da LDOs don daidaita voltage koyaushe yana da sauƙi. Ƙara LDO zuwa kowane da'irar yana buƙatar capacitors biyu kawai da resistors biyu a mafi yawan. Yawancin ST's LDOs suna samuwa a cikin ƙayyadaddun kayan aiki, wanda ke bawa injiniyan damar barin resistors, wasu ma suna aiki ba tare da wani capacitors na waje ba kwata-kwata.

Ƙananan girma
Sabbin fasahohi da sabbin hanyoyin magance su suna ba da izinin samar da LDOs a cikin ƙananan masu girma dabam, irin su ST ST mara nauyi.AMP™
(0.47 x 0.47 mm) fakiti.

Babban PSRR da ƙaramar amo
Na'urori don aikace-aikacen RF, jujjuya bayanai, kiwon lafiya da sarrafa sigina galibi suna da sauƙi ga hayaniya. Yayin da babban manufar LDO shine daidaita voltage, yadda LDOs ke aiki kuma yana sa su ƙware wajen tace hayaniyar samar da wutar lantarki, yana ba da damar amo mai ɗaukar nauyi yin aiki da kyau.

Ƙarancin halin yanzu
Ƙarƙashin amfani da kai yana da kyau don aikace-aikacen šaukuwa da baturi inda ƙaramin motsi na yanzu zai iya yin babban bambanci dangane da rayuwar baturin aikace-aikacen. LDOs na ST's ultra-low quiescence LDOs yana riƙe kyakkyawan aiki mai ƙarfi kuma ana samun su a cikin fakitin ƙaramin sawun ƙafa iri-iri.

Ƙarfafa nauyi mai ƙarfi
Abubuwan da ake buƙata na da'irori na dijital, kamar microprocessors, abubuwan tunawa da na'urorin sarrafa siginar dijital, koyaushe ana tura su zuwa ƙananan vol.tage matakan, yayin da tolerances suna tightening. Kula da ingantaccen fitarwa voltage, yayin da kuma riƙe wasu mahimman siffofi shine maɓalli lokacin zabar LDO don waɗannan aikace-aikacen.

ZABEN KYAUTA

Ƙarfafa-ƙananan raguwa
The dropout voltage shine ƙayyadaddun mafi ƙarancin bambanci tsakanin shigar voltage da abin da ake so voltage a ƙayyadadden fitarwa na halin yanzu. ultra-low- dropout voltage yana ƙara tsawon rayuwar na'urori masu sarrafa baturi, saboda yana ba LDO damar kula da babban fitarwa na yanzu koda lokacin da baturi ya tashi.tage yana raguwa yayin da baturi ya ƙare.
Bugu da ƙari kuma, yana rage ƙarfin wutar lantarki.

LD57100

LDL112

LD39200

Saukewa: LD39115J

LDCL015

Ƙarancin halin yanzu
Quiescent halin yanzu shine na yanzu da ake amfani dashi don sarrafa kewayen ciki na LDO. LDOs masu ƙarancin halin yanzu suna da mahimmanci don kiyaye ingantaccen aiki da tsawaita rayuwar batir, kuma zaɓi ne na halitta don aikace-aikace tare da tsawan lokacin jiran aiki.

STLQ50/015/020

Saukewa: ST715/LDK715

ST730 / ST732

LD39100 / LD49100

Saukewa: LD39115J

LDLN025

Babban PSRR/Ƙaramar amo
PSRR ma'auni ne na ikon LDO don jure canjin shigarwa voltage ba tare da barin shi ya shafi fitarwa ba, yayin da ƙananan amo LDOs an tsara su don rage girman hayaniyar.
Kula da abin da ake tsammani voltage tare da madaidaicin madaidaici da ƙaramar amo yana da mahimmanci lokacin kunna na'urori masu mahimmanci ko lokacin da aka samar da wutar lantarkitage an samo shi daga tushe mai surutu.

LDLN015/025/030

LD39015/020/030

LD56020

LD3985

LDBL20

LD59015

LDLN050

GLOSSARY

• Daidaito - Matsakaicin sabawa daga ƙayyadadden fitarwa. Matsaloli na iya shafar daidaito na ƙima kamar ƙananan abubuwan haɗin gwiwar haƙuri, zazzabi da bambancin kaya. Yawanci ana ambatonsa a cikin kewayon zafin jiki, wani lokaci ana bayyana shi azaman Haƙuri.
• AEC-Q100 - Duk wani haɗin da'irar da aka haɗa yana buƙatar gwadawa don dacewa da yanayin gazawar / gwajin damuwa kamar yadda aka bayyana a cikin AEC-Q100 kafin a iya siyar da shi azaman na'urar ƙirar mota.
• Bias voltage (Vbias) - Ana buƙatar layin dogo na waje ta wasu LDOs. Haɗe da ƙaramin dropout voltages da kyawawan halayen amo.
• Fitar da voltage - The dropout voltage shine ma'auni na ƙaramin bambanci tsakanin shigarwa da fitarwa voltage. Ƙarƙashin raguwa yana ba da izini don ingantaccen tsari kuma ana iya amfani dashi don tsawaita rayuwar na'urori masu ƙarfin baturi.
• Kunna/Hana (EN/INH) - Ƙaddamarwa (ko kashewa) waje na kewayawa na ciki lokacin da ba'a buƙatar mai sarrafawa yana rage abin da ake cinyewa kuma yana iya tsawaita rayuwar baturi.
• Cibiyar amsawa - Ana amfani da masu adawa da su don saita juzu'in fitarwa da ake sotage a cikin mai sarrafa linzamin kwamfuta. A cikin ƙayyadaddun masu sarrafa fitarwa, waɗannan an riga an haɗa su a cikin guntu kanta.
• Ka'idar Layi - Tsarin layi yana bayyana yadda mai sarrafa zai iya kula da abin da aka yi niyya voltage an ba da canji a cikin shigar da voltage.
• Dokokin Load - Tsarin kaya yana kwatanta ikon mai sarrafawa don kula da ƙayyadaddun fitarwa da aka ba da canji a cikin yanayin kaya (fitarwa).
• Hayaniya – Musamman hayaniyar da ke haifar da ma'anar bandgap na ciki na LDO, wanda shine ampingantacce a cikin hanyar sadarwar ra'ayi. Kyakkyawan ƙididdiga masu kyau suna da mahimmanci a cikin da'irori don sadarwar mara waya ko waɗanda suka dogara da siginar agogo mai sauri.
• Kunshin - Girman marufi shine daidaitawa tsakanin girman da kaddarorin thermal. Karamin kunshin, mafi saukin kamuwa da dumama kai. Wasu manyan fakiti sun fallasa fakitin ƙarfe don sauƙaƙe watsar da zafi a cikin PCB, yana ba da damar ingantacciyar sanyaya.
• Wucewa Element - Voltage ka'ida ana yin ta ta amfani da m voltage zuwa Ƙofar MOSFET, yana sanya ta yin aiki a cikin hanya iri ɗaya zuwa mai canzawa. Wannan transistor ana kiransa da kalmar wucewa.
• Rushewar Wuta - Lokacin da juzu'itage an kayyade, wuce haddi iko ne dissipated a matsayin zafi. Kamar yadda zafi zai iya rinjayar LDO da sauran sassa mara kyau, kuma a ƙarshe ya haifar da rashin aiki ko kashewar thermal, kula da thermal yana da mahimmanci.
• Power Good (PG) - Wannan siginar yana nuna cewa fitarwa yana cikin tsari. Yana da amfani don jerin-ƙarfi, sake saiti na jawo, da ƙari.
• PSRR- Ratio na Ƙimar Samar da Wuta, ma'auni na ikon LDO don tace hayaniyar hayaniya a cikin kundin shigarwa.tage. Ana bayyana shi koyaushe a cikin dB, kuma koyaushe yana kan kewayon mitoci.
• Quiescent halin yanzu - Mai sarrafawa yana cinyewa don sarrafa kewayen ciki. Rage ƙarfin halin yanzu yana da mahimmanci musamman don mafita mai ƙarfin baturi.
• Soft Start (SS) - Soft Start shine haɓakar haɓakar wutar lantarki a hankali, wanda ke hana manyan igiyoyin ruwa waɗanda zasu iya wuce gona da iri.
• Rufewar thermal - Aikin karewa wanda ke rufe na'urar don hana lalacewa daga zafi fiye da kima.
• Amsa na wucin gadi - Bayanin ikon mai gudanarwa don tsayayya da canje-canje masu sauri, wanda aka sani da masu wucewa, a cikin kaya da yanayin wadata. Duba Layin Mai Wucewa da Load Mai Wucewa.
  Don ƙarin bayani ziyarci mu www.st.com/ldo

TUNTUBE
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Saukewa: D-85586
Im Technologiepark 2-8
Waya: +49 (0) 8121 774-0
Fax: +49 (0) 8121 774-422

Takardu / Albarkatu

STMicroelectronics Low-Dropout LDO Linear Voltage Masu Gudanarwa [pdf] Jagorar mai amfani Low-Dropout LDO Linear Voltage Masu Gudanarwa, LDO Linear Voltage Masu Gudanarwa, Linear Voltage Masu Gudanarwa, Voltage Masu Gudanarwa, Masu Gudanarwa

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