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LTM4608AEV-PBF

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 343K
描述
Low VIN, 8A DC/DC μModule with Tracking, Margining, and Frequency Synchronization

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LTM4608A  
Low V , 8A DC/DC  
IN  
µModule with Tracking, Margining,  
and Frequency Synchronization  
FEATURES  
DESCRIPTION  
The LTM®4608A is a complete 8A switch mode DC/DC  
■
Complete Standalone Power Supply  
■
1.75% Total DC Output Error (–55°C to 125°C)  
2.7V 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  
power supply with 1.75% total output voltage error. In-  
cluded in the package are the switching controller, power  
FETs,inductorandallsupportcomponents.Operatingover  
aninputvoltagerangeof2.7Vto5.5V, theLTM4608Asup-  
ports an output voltage range of 0.6V 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 to complete the design.  
■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Multiphase Operation  
Parallel Current Sharing  
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, Low Profile 9mm × 15mm × 2.8mm  
LGA Package (0.630mm Pads)  
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 0.630mm LGA pads  
with 1.27mm pitch simplify PCB layout by providing stan-  
dard trace routing and via placement. The high switching  
frequency and 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.  
APPLICATIONS  
■
Telecom, Networking and Industrial Equipment  
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 surface mount LGA package. The  
LTM4608A is Pb-free and RoHS compliant.  
■
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. Protected by U.S.  
Patents, including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131.  
TYPICAL APPLICATION  
Efficiency vs Load Current  
100  
3V to 5.5V Input to 1.8V Output DC/DC μModule™  
V
= 1.8V  
OUT  
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  
LTM4608A  
80  
75  
70  
RUN  
I
THM  
PGOOD  
PLLLPF  
TRACK  
PGOOD  
MGN  
V
OUT  
CLKOUT GND SGND  
4608A TA01a  
0
2
4
6
8
10  
LOAD CURRENT (A)  
4608A TA01b  
4608afa  
1
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