參數(shù)資料
型號(hào)： LTC3541EDD-3#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.25 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10
封裝： 3 X 3 MM, PLASTIC, M0-229WEED-2, DFN-10
文件頁數(shù)： 1/20頁
文件大小： 379K
代理商： LTC3541EDD-3#TR
LTC3541-3
35413fc
High Efficiency
Buck + VLDO Regulator
■
DigitalCameras
■
CellularPhones
■
PCCards
■
WirelessandDSLModems
■
OtherPortablePowerSystems
■
High Efficiency 500mA Buck Plus 300mA VLDO
Regulator
Auto Start-Up Powers VLDO/Linear Regulator
Output Prior to Buck Output
■
Independent 500mA High Efficiency Buck
(VIN: 2.7V to 5.5V)
■
300mA VLDO Regulator with 30mA Standalone Mode
■
No External Schottky Diodes Required
■
FixedBuck Output Voltage: 1.8V
■
VLDO Input Voltage Range (LVIN: 1.675V to 5.5V)
■
FixedVLDO Output Voltage: 1.575V
■
SelectableFixedFrequency,Pulse-SkipOperation
orBurstModeOperation
■
Short-CircuitProtected
■
CurrentModeOperationforExcellentLineandLoad
TransientResponse
■
ShutdownCurrent:<3
A
■
ConstantFrequencyOperation:2.25MHz
■
LowDropoutBuckOperation:100%DutyCycle
■
Small,ThermallyEnhanced,10-Lead(3mm
×3mm)
DFNPackage
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. VLDO is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5481178, 6611131, 6304066, 6498466, 6580258.
The LTC3541-3 combines a synchronous buck DC/
DCconverterwithaverylowdropoutlinearregulator
(VLDOTMregulator)andinternalfeedbackresistornetworks
toprovidetwooutputvoltagesfromasingleinputvoltage
withminimumexternalcomponents.Whenconfigured
fordualoutputoperation,theLTC3541-3’sautostart-up
featurewillbringthe1.575VVLDO/linearregulatoroutput
intoregulationinacontrolledmannerpriortoenablingthe
1.8Vbuckoutputwithouttheneedforexternalpincontrol.
The300mAVLDO/linearregulatoroutputwillsourceonly
30mAuntilthebuckoutputachievesregulation.Theinput
voltagerangeisideallysuitedforapplicationspowered
fromaLi-Ionbatteryand5Vor3.3Vrails.
Thesynchronousbuckconverterprovidesahighefficiency
output,typically90%.Itcanprovideupto500mAofoutput
currentwhileswitchingat2.25MHz,allowingtheuseof
smallsurfacemountinductorsandcapacitors.Amode
selectpinallowsBurstModeoperationtobeenabledfor
higherefficiencyatlightloadcurrents,ordisabledforlower
noise,constantfrequencyoperation.
TheVLDOregulatorprovidesalownoise,lowvoltage
outputcapableofprovidingupto300mAofoutputcurrent
usingonlya2.2
Fceramiccapacitor.Theinputsupply
voltageoftheVLDOregulator(LVIN)maycomefromthe
buckregulatororaseparatesupply.
LTC3541-3 Typical Application
SW
VIN
ENBUCK
VOUT
LVIN
ENVLDO
MODE
GND
LVOUT
PGND
LTC3541-3
VOUT2
1.575V
2.2
F
35413 TA01a
2.2
H
10
F
VIN
3V TO 5V
VOUT1
1.8V
Buck (Burst) Efficiency vs Load Current
LOAD CURRENT (mA)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
20
10
80
50
70
60
40
1
10
100
1000
35413 TA01b
0
0.1
1
0.001
0.01
0.0001
EFFICIENCY
POWER
LOSS
VIN = 3V
相關(guān)PDF資料
PDF描述
LTC3542EDC 0.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6
LTC3542ES6 0.5 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6
LTC3543EDCB#PBF 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6
LTC3543EDCB#TRM 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6
LTC3543EDCB 1.3 A SWITCHING REGULATOR, 2250 kHz SWITCHING FREQ-MAX, PDSO6
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3542 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter
LTC3542-1 制造商:LINER 制造商全稱:Linear Technology 功能描述:500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter
LTC3542EDC#PBF 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.25MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.25MHZ, 500mA, DFN-6; Primary Input Voltage:5.5V; No. of Outputs:1; Output Current:500mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-DFN ;RoHS Compliant: Yes
LTC3542EDC#TRMPBF 功能描述:IC REG BUCK SYNC ADJ 0.5A 6DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色產(chǎn)品:BD91x Series Step-Down Regulators 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:兩者兼有 輸出數(shù):2 輸出電壓:3.3V，0.8 V ~ 2.5 V 輸入電壓:4.5 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關(guān):1MHz 電流 - 輸出:1.5A 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:VQFN020V4040 產(chǎn)品目錄頁面:1373 (CN2011-ZH PDF) 其它名稱:BD9152MUV-E2TR
LTC3542EDC#TRPBF 功能描述:IC REG BUCK SYNC ADJ 0.5A 6DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR
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