Electronic Components Datasheet Search |
|
LTC3541 Datasheet(PDF) 8 Page - Linear Technology |
|
LTC3541 Datasheet(HTML) 8 Page - Linear Technology |
8 / 20 page LTC3541 3541fa OPERATIO The LTC3541 contains a high efficiency synchronous buckconverter,averylowdropoutregulator(VLDO)and alinearregulator.Itcanbeusedtoprovideuptotwo outputvoltagesfromasingleinputvoltagemakingthe LTC3541idealforapplicationswithlimitedboardspace. Thecombinationandconfigurationofthesemajorblocks withintheLTC3541isdeterminedbywayofthecontrol pinsENBUCKandENVLDOasdefinedinTable1. WiththeENBUCKpindriventoalogichighandENVLDO driventoalogiclow,theLTC3541enablesthebuckcon- vertertoefficientlyreducethevoltageprovidedattheVIN inputpintoanoutputvoltagewhichissetbyanexternal feedbackresistornetwork.Thebuckregulatorcanbecon- figuredforPulse-SkiporBurstModeoperationbydriving theMODEpintoalogichighorlogiclowrespectively.The buckregulatoriscapableofprovidingamaximumoutput currentof500mA,whichmustbetakenintoconsideration whenusingthebuckregulatortoprovidethepowerfor boththeVLDOandforexternalloads. WiththeENBUCKpindriventoalogiclowandENVLDO driven to a logic high, the LTC3541 enables the linear regulator,providingalownoiseregulatedoutputvoltage attheLVOUTpinwhiledrawingminimalquiescentcurrent fromtheVINinputpin.Thisfeatureallowsoutputvoltage LVOUTtobebroughtintoregulationwithoutthepresence oftheLVINvoltage. With the ENBUCK and ENVLDO pins both driven to a logichigh,theLTC3541enablesthehighefficiencybuck converterandVLDOregulator,providingdualoutputopera- tionfromasingleinputvoltage.Whenconfiguredinthis manner,theLTC3541’sautostart-upsequencingfeature willbringthebuckoutputintoregulationinacontrolled mannerpriortoenablingtheVLDOregulatorwithoutthe FU CTIO AL BLOCK DIAGRA – + VLDO/LINEAR REG LFB 3541 F01 PGND GND 500mA BUCK SW VIN REF ENVLDO MODE FB GND PGND REF REF LFB CNTRL GND LVIN VIN CONTROL LOGIC 4 LVIN 6 BUCKFB IOUT(BUCK) = 500mA LVOUT 5 8 ENBUCK VIN VIN(MIN) ≥ LVOUT + 1.4V SW 1 10 10 µF 22pF 2.2 µF LVOUT(MAX) < VIN – 1.4V IOUT = 300mA (VLDO REG) IOUT = 30mA (LINEAR REG) 2.2 µH 11 7 3 2 9 Figure 1. LTC3541 Functional Block Diagram |
Similar Part No. - LTC3541 |
|
Similar Description - LTC3541 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |