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参数资料
| 型号： | LTC3541EDD-3 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.25 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, PLASTIC, M0-229WEED-2, DFN-10 |
| 文件页数： | 1/20页 |
| 文件大小： | 379K |
| 代理商： | LTC3541EDD-3 |
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
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3541EDD-3#TR | 1.25 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3541EDD-3#PBF | 功能描述:IC REG DL BCK/LINEAR SYNC 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LTC3541EDD-3#TRPBF | 功能描述:IC REG DL BCK/LINEAR SYNC 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LTC3542 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter |
| LTC3542-1 | 制造商:LINER 制造商全称: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 |
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