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參數(shù)資料
| 型號： | LTC3541EDD#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, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 345K |
| 代理商： | LTC3541EDD#TR |
LTC3541
3541fa
High Efficiency
Buck + VLDO Regulator
■
PDAs/PalmtopPCs
■
DigitalCameras
■
CellularPhones
■
PCCards
■
WirelessandDSLModems
■
OtherPortablePowerSystems
■
High Efficiency, 500mA Buck Plus 300mA VLDOTM
Regulator
Auto Start-Up Powers Buck Output Prior to
VLDO/Linear Regulator Output
■
Independent High Efficiency, 500mA Buck
(VIN: 2.7V to 5.5V)
■
300mA VLDO Regulator with 30mA Standalone Mode
■
No External Schottky Diodes Required
■
Buck Output Voltage Range: 0.8V to 5V
■
VLDO Input Voltage Range (LVIN): 0.9V to 5.5V
■
VLDO Output Voltage Range VLDO: 0.4V to 4.1V
■
SelectableFixedFrequency,Pulse-SkipOperationor
BurstModeOperation
■
Short-CircuitProtected
■
CurrentModeOperationforExcellentLineandLoad
TransientResponse
■
ConstantFrequencyOperation:2.25MHz
■
LowDropoutBuckOperation:100%DutyCycle
■
Small,ThermallyEnhanced,10-Lead(3mm
×3mm)
DFNPackage
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
, LT, LTc and LTM 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
TheLTC3541combinesasynchronousbuckDC/DC
converterwithaverylowdropoutlinearregulator
(VLDO)toprovideuptotwooutputvoltagesfromasingle
inputvoltagewithminimalexternalcomponents.When
configuredfordualoutputoperation,theLTC3541’sauto
start-upfeaturewillbringtheBuckoutputintoregulation
inacontrolledmannerpriortoenablingtheVLDOregulator
outputwithouttheneedforexternalpincontrol.VLDO/
linearregulatoroutputpriortoBuckoutputsequencing
mayalsobeobtainedviaexternalpincontrol.Theinput
voltagerangeisideallysuitedforLi-Ionbattery-powered
applications,aswellaspoweringsub-3.3Vlogicfrom5V
or3.3Vrails.
Thesynchronousbuckconverterprovidesahighefficiency
output,typically90%,capableofprovidingupto500mA
ofcontinuousoutputcurrentwhileswitchingat2.25MHz,
allowingtheuseofsmallsurfacemountinductorsandca-
pacitors.Amode-selectpinallowsBurstModeoperation
tobeenabledforhigherefficiencyatlightloadcurrents,or
disabledforlowernoise,constantfrequencyoperation.
TheVLDOregulatorprovidesalownoise,lowvoltage
outputcapableofprovidingupto300mAofcontinuous
outputcurrentusingonlya2.2Fceramiccapacitor.The
inputsupplyvoltageoftheVLDOregulator(LVIN)may
comefromthebuckregulatororaseparatesupply.
SW
VIN
ENBUCK
BUCKFB
LVIN
ENVLDO
MODE
GND
LFB
LVOUT
PGND
LTC3541
150k
VOUT2
1.5V
300mA
2.2
F
115k
3541 TA01a
2.2
H
10
F
VIN
2.9V TO 5.5V
243k
22pF
412k
VOUT1
2.5V
200mA
LTC3541 Typical Application
Buck (Burst) Efficiency and Power Loss vs Load Current
LOAD CURRENT (mA)
1
40
EFFICIENCY
(%)
POWER
LOSS
(W)
50
60
70
80
10
100
1000
3541 TA01b
30
20
10
0
90
100
0.001
0.01
0.1
0.0001
1
VIN = 3.3V
VOUT = 2.5V
EFFICIENCY
POWER LOSS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3541EDD | 1.25 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
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| LTC3566EUF-2#PBF | 2.5 A BATTERY CHARGE CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PQCC24 |
| LTC3566EUF-2#TRPBF | 2.5 A BATTERY CHARGE CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PQCC24 |
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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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