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参数资料
| 型号： | LTC3541EDD-2#TR |
| 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, MO-229WEED-2, DFN-10 |
| 文件页数： | 1/20页 |
| 文件大小： | 335K |
| 代理商： | LTC3541EDD-2#TR |
LTC3541-2
35412fb
High Efficiency
Buck + VLDO Regulator
■
DigitalCameras
■
CellularPhones
■
PCCards
■
WirelessandDSLModems
■
OtherPortablePowerSystems
■
High Efficiency, 500mA Buck Plus 300mA VLDO
Regulator
Auto Start-Up Powers Buck Output Prior to VLDO/
Linear Regulator 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: 1.875V
■
VLDO Input Voltage Range (LVIN: 1.6V to 5.5V)
■
FixedVLDO Output Voltage: 1.5V
■
SelectableFixedFrequency,Pulse-SkipOperation
orBurstModeOperation
■
Short-CircuitProtected
■
CurrentModeOperationforExcellentLineandLoad
TransientResponse
■
ShutdownCurrent:<3A
■
ConstantFrequencyOperation:2.25MHz
■
LowDropoutBuckOperation:100%DutyCycle
■
Small,ThermallyEnhanced,10-Lead(3mm
×3mm)
DFNPackage
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
TheLTC3541-2combinesasynchronousbuckDC/
DCconverterwithaverylowdropoutlinearregulator
(VLDOTMregulator)andinternalfeedbackresistornetworks
toprovidetwooutputvoltagesfromasingleinputvolt-
agewithminimalexternalcomponents.Whenconfigured
fordualoutputoperation,theLTC3541-2’sautostart-up
featurewillbringthe1.875Vbuckoutputintoregulation
inacontrolledmanner,priortoenablingthe1.5VVLDO
outputwithouttheneedforexternalpincontrol.The
1.5VVLDO/linearregulatoroutputpriorto1.875Vbuck
outputsequencingmayalsobeobtainedviaexternalpin
control.TheinputvoltagerangeisideallysuitedforLi-Ion
batteryapplicationspoweringsub-3.3Vlogicfrom5Vor
3.3Vrails.
Thesynchronousbuckconverterprovidesahighefficiency
output,typically90%.Itcanprovideupto500mAofoutput
currentwhileswitchingat2.25MHz,allowingtheuseof
smallsurfacemountinductorsandcapacitors.Amode-
selectpinallowsBurstModeoperationtobeenabledfor
higherefficiencyatlightloadcurrents,ordisabledforlower
noise,constantfrequencyoperation.
TheVLDOregulatorprovidesalownoise,lowvoltage
outputcapableofprovidingupto300mAofoutputcurrent
usingonlya2.2Fceramiccapacitor.Theinputsupply
voltageoftheVLDOregulator(LVIN)maycomefromthe
buckregulatoroutputoraseparatesupply.
SW
VIN
ENBUCK
VOUT
LVIN
ENVLDO
MODE
GND
LVOUT
PGND
LTC3541-2
VOUT2
1.5V
300mA
2.2
F
35412 TA01a
2.2
H
10
F
VIN
2.9V TO 5.5V
VOUT1
1.875V
200mA
LOAD CURRENT (mA)
1
40
EFFICIENCY
(%)
POWER
LOSS
(W)
50
60
70
80
10
100
1000
35412 TA01b
30
20
10
0
90
100
0.01
0.1
0.001
0.0001
1
VIN = 3V
EFFICIENCY
POWER LOSS
Buck (Burst) Efficiency vs Load Current
, 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.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3541EDD-3 | 1.25 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3541EDD-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Buck + VLDO Regulator |
| 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 |
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