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LTC3418

更新时间： 2023-12-20 18:45:12
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
22页 482K
描述
8A、4MHz、单片式同步降压型稳压器

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中文翻译

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LTC3418 数据手册

 浏览型号LTC3418的Datasheet PDF文件第2页浏览型号LTC3418的Datasheet PDF文件第3页浏览型号LTC3418的Datasheet PDF文件第4页浏览型号LTC3418的Datasheet PDF文件第5页浏览型号LTC3418的Datasheet PDF文件第6页浏览型号LTC3418的Datasheet PDF文件第7页 
LTC3418  
8A, 4MHz, Monolithic  
Synchronous Step-Down  
Regulator  
FeaTures  
DescripTion  
TheLTC®3418iꢃahighefficiency,monolithicꢃynchronouꢃ  
ꢃteꢅ-downDC/DCconverterutilizingaconꢃtantfrequency,  
currentmodearchitecture.Itoꢅerateꢃfromaninꢅutvoltage  
range of 2.25V to 5.5V and ꢅrovideꢃ a regulated outꢅut  
voltage from 0.8V to 5V while delivering uꢅ to 8ꢂ of outꢅut  
current.Theinternalꢃynchronouꢃꢅowerꢃwitchincreaꢃeꢃ  
efficiency and eliminateꢃ the need for an external Schottky  
diode. Switching frequency iꢃ ꢃet by an external reꢃiꢃtor  
or can be ꢃynchronized to an external clock. ꢄPTI-LꢄꢄP®  
comꢅenꢃationallowꢃthetranꢃientreꢃꢅonꢃetobeoꢅtimized  
over a wide range of loadꢃ and outꢅut caꢅacitorꢃ.  
n
High Efficiency: Up to 95%  
n
8A Output Current  
n
2.25V to 5.5V Input Voltage Range  
n
Low R  
Internal Switch: 35mΩ  
DS(ON)  
n
n
n
n
n
Tracking Input to Provide Easy Supply Sequencing  
Programmable Frequency: 300kHz to 4MHz  
0.8V 1ꢀ ꢁeference ꢂllowꢃ Low ꢄutꢅut Voltage  
Quieꢃcent Current: 380µꢂ  
Selectable Forced Continuouꢃ/Burꢃt Mode® ꢄꢅeration  
with ꢂdjuꢃtable Burꢃt Clamꢅ  
n
n
n
n
n
Synchronizable Switching Frequency  
Low Droꢅout ꢄꢅeration: 100ꢀ Duty Cycle  
Power Good ꢄutꢅut Voltage Monitor  
ꢄvertemꢅerature Protected  
38-Lead Low Profile (0.75mm) Thermally Enhanced  
QFN (5mm × 7mm) Package  
The LTC3418 can be configured for either Burꢃt Mode  
oꢅeration or forced continuouꢃ oꢅeration. Forced con-  
tinuouꢃ oꢅeration reduceꢃ noiꢃe and ꢁF interference  
while Burꢃt Mode oꢅeration ꢅrovideꢃ high efficiency by  
reducing gate charge loꢃꢃeꢃ at light loadꢃ. In Burꢃt Mode  
oꢅeration, external control of the burꢃt clamꢅ level allowꢃ  
the outꢅut voltage riꢅꢅle to be adjuꢃted according to the  
requirementꢃ of the aꢅꢅlication. ꢂ tracking inꢅut in the  
LTC3418 allowꢃ for ꢅroꢅer ꢃequencing with reꢃꢅect to  
another ꢅower ꢃuꢅꢅly.  
applicaTions  
n
Microꢅroceꢃꢃor, DSP and Memory Suꢅꢅlieꢃ  
n
Diꢃtributed 2.5V, 3.3V and 5V Power Syꢃtemꢃ  
n
ꢂutomotive ꢂꢅꢅlicationꢃ  
n
Point of Load ꢁegulation  
L, LT, LTC and LTM are regiꢃtered trademarkꢃ of Linear Technology Corꢅoration.  
Burꢃt Mode and ꢄPTI-LꢄꢄP are regiꢃtered trademarkꢃ of Linear Technology Corꢅoration.  
ꢂll other trademarkꢃ are the ꢅroꢅerty of their reꢃꢅective ownerꢃ. Protected by U.S. Patentꢃ  
including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 6724174.  
n
Notebook Comꢅuterꢃ  
Typical applicaTion  
2.5V/8A Step-Down Regulator  
Efficiency and Power Loss vs Load Current  
100  
90  
80  
70  
60  
50  
40  
30  
20  
100000  
10000  
1000  
100  
V
IN  
2.8V TO 5.5V  
C
IN  
47µF  
EFFICIENCY  
×4  
SV TRACK PV  
IN IN  
0.2µH  
V
2.5V  
8A  
OUT  
R
T
SW  
C
OUT  
2.2M  
LTC3418  
30.1k  
100µF  
PGOOD  
PGND  
SGND  
×2  
POWER LOSS  
RUN/SS  
I
1000pF  
TH  
4.99k SYNC/MODE  
V
FB  
10  
820pF  
332Ω  
1.69k  
4.32k  
V
V
= 3.3V  
IN  
OUT  
3418 TA01a  
= 2.5V  
1
0.01  
0.1  
1
10  
LOAD CURRENT (A)  
3418 TA01b  
3418fc  
1
For more information www.linear.com/LTC3418  
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