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LTC3610

更新时间： 2023-12-20 18:46:32
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
24页 392K
描述
24V、12A 单片式同步降压型 DC/DC 转换器

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中文翻译

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LTC3610 数据手册

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LTC3610  
24V, 12A Monolithic  
Synchronous Step-Down  
DC/DC Converter  
Description  
Features  
TheLTC®3610isahighefficiency,monolithicsynchronous  
step-down DC/DC converter that can deliver up to 12A  
output current from a 4V to 24V (28V maximum) input  
supply. It uses a valley current control architecture to de-  
liver very low duty cycle operation at high frequency with  
excellent transient response. The operating frequency is  
selected by an external resistor and is compensated for  
■
ꢀ 12AꢀOutputꢀCurrent  
■
ꢀ WideꢀV ꢀRangeꢀ=ꢀ4Vꢀtoꢀ24V  
IN  
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
ꢀ InternalꢀN-ChannelꢀMOSFETs  
ꢀ TrueꢀCurrentꢀModeꢀControl  
ꢀ OptimizedꢀforꢀHighꢀStep-DownꢀRatios  
ꢀ t ꢀ≤100ns  
ON(MIN)  
ꢀ ExtremelyꢀFastꢀTransientꢀResponse  
ꢀ StableꢀwithꢀCeramicꢀC  
variations in V and V  
.
OUT  
IN  
OUT  
ꢀ 1ꢁꢀ0.6VꢀVoltageꢀReference  
Power Good Output Voltage Monitor  
Adjustable On-Time/Switching Frequency  
Adjustable Current Limit  
The LTC3610 can be configured for discontinuous or  
forced continuous operation at light load. Forced continu-  
ous operation reduces noise and RF interference while  
discontinuous mode provides high efficiency by reducing  
switching losses at light loads.  
Programmable Soft-Start  
Output Overvoltage Protection  
Optional Short-Circuit Shutdown Timer  
Low Shutdown I : 15µA  
Available in a 9mm × 9mm 64-Pin QFN Package  
Fault protection is provided by internal foldback current  
limiting,anoutputovervoltagecomparatorandanoptional  
short-circuitshutdowntimer. Soft-startcapabilityforsup-  
ply sequencing is accomplished using an external timing  
capacitor.Theregulatorcurrentlimitisuserprogrammable.  
A power good output voltage monitor indicates when  
the output is in regulation. The LTC3610 is available in a  
compact 9mm × 9mm QFN package.  
Q
applications  
■
Point of Load Regulation  
Distributed Power Systems  
■
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 5481178, 6100678, 6580258, 5847554, 6304066.  
typical application  
HighꢀEfficiencyꢀStep-DownꢀConverter  
604k  
EfficiencyꢀvsꢀLoadꢀCurrent  
V
I
0.1µF  
ON  
ON  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
10000  
1000  
100  
10  
V
IN  
4V TO 24V  
RUN/SS  
V
IN  
V
= 5V  
IN  
10µF  
×3  
100pF  
LTC3610  
0.47µH  
0.22µF  
V
2.5V  
12A  
OUT  
V
= 12V  
IN  
SW  
470pF  
31.83k  
100µF  
×2  
I
BOOST  
TH  
SGND INTV  
CC  
POWER LOSS 12V  
30.1k  
9.5k  
FCB  
POWER LOSS 5V  
0.1  
4.7µF  
V
RNG  
V
OUT  
= 2.5V  
10  
PGND  
PGOOD  
1
0.01  
1
EXTV  
CC  
V
FB  
LOAD CURRENT (A)  
3610 TA01a  
3610ff  
ꢀ
1234567...24

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