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LTM4608

更新时间： 2024-12-01 05:44:07
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
24页 302K
描述
Low VIN, 8A DC/DC μModuleTM with Tracking, Margining, and Frequency Synchronization

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中文翻译

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LTM4608 数据手册

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LTM4608  
Low V , 8A DC/DC  
IN  
µModuleTM with Tracking, Margining,  
and Frequency Synchronization  
FEATURES  
DESCRIPTION  
TheLTM®4608isacomplete8AswitchmodeDC/DCpower  
supply. Included in the package are the switching control-  
ler, power FETs, inductor and all support components.  
Operating over an input voltage range of 2.375V to 5.5V,  
the LTM4608 supports an output voltage range of 0.6V  
■
Complete Standalone Power Supply  
■
1.5% Output Voltage Regulation  
■
2.375V to 5.5V Input Voltage Range  
■
8A DC, 10A Peak Output Current  
■
0.6V Up to 5V Output  
■
Output Voltage Tracking and Margining  
Power Good Tracks Margining  
to 5V, set by a single external resistor. This high efficiency  
design delivers up to 8A continuous current (10A peak).  
Only bulk input and output capacitors are needed.  
■
■
■
■
■
■
■
■
■
■
■
Multiphase Operation  
Parallel Current Sharing  
The low profile package (2.8mm) enables utilization of  
unused space on the back side of PC boards for high  
density point-of-load regulation. The high switching  
frequency and a current mode architecture enable a very  
fast transient response to line and load changes without  
sacrificing stability. The device supports frequency syn-  
chronization, programmable multiphase and/or spread  
spectrum operation, output voltage tracking for supply  
rail sequencing and voltage margining.  
Onboard Frequency Synchronization  
Spread Spectrum Frequency Modulation  
Overcurrent/Thermal Shutdown Protection  
Current Mode Control/Fast Transient Response  
Selectable Burst Mode® Operation  
Up to 95% Efficiency  
Output Overvoltage Protection  
Small Surface Mount Footprint, Low Profile  
(15mm × 9mm × 2.8mm) LGA Package  
Fault protection features include overvoltage protection,  
overcurrent protection and thermal shutdown. The power  
module is offered in a compact and thermally enhanced  
15mm × 9mm × 2.8mm LGA package. The LTM4608 is  
Pb-free and RoHS compliant .  
APPLICATIONS  
■
Telecom, Networking and Industrial Equipment  
Storage Systems  
■
■
Point of Load Regulation  
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology  
Corporation. μModule is a trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Efficiency vs Load Current  
100  
3V to 5.5V Input to 1.8V Output DC/DC μModule  
95  
CLKIN  
V
= 3.3V  
IN  
CLKIN  
90  
85  
V
V
IN  
3V TO 5.5V  
10μF  
OUT  
1.8V  
100μF  
V
V
IN  
OUT  
V
= 5V  
IN  
SV  
FB  
IN  
4.87k  
SW  
I
TH  
LTM4608  
80  
75  
70  
RUN  
I
THM  
PGOOD  
PLLLPF  
TRACK  
PGOOD  
MGN  
V
OUT  
V
= 1.8V  
CLKOUT GND SGND  
OUT  
8
4608 TA01a  
0
2
4
6
10  
LOAD CURRENT (A)  
4608 TA01b  
4608f  
1
1234567...24

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