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LTM4648

更新时间： 2024-09-25 01:23:07
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 380K
描述
Low VIN, 10A Step-Down μModule Regulator

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LTM4648 数据手册

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LTM4648  
Low V , 10A Step-Down  
IN  
µModule Regulator  
FeaTures  
DescripTion  
The LTM®4648 is a 10A low V  
step-down  
n
10A DC Output Current  
IN  
DC/DC µModule® (micromodule) regulator. Included in  
the package are the switching controller, power FETs,  
inductor and all support components. Operating over  
an input voltage range of 2.375V to 5.5V, the LTM4648  
supports an output voltage range of 0.6V to 5V, set by a  
singleexternalresistor.Thishighefficiencydesigndelivers  
up to 10A continuous current. Only bulk input and output  
capacitors are needed.  
n
Input Voltage Range: 2.375V to 5.5V  
n
Output Voltage Range: 0.6V to 5V  
n
No Heat Sink or Current Derating Up to 85°C  
Ambient Temperature  
n
1.5ꢀ Maꢁimum Total DC Output Error  
n
Multiphase Operation with Current Sharing  
n
Remote Sense Amplifier  
n
Built-In Temperature Monitor  
Selectable Pulse-Skipping Mode/Burst Mode®  
n
Highswitchingfrequencyandacurrentmodearchitecture  
enable a very fast transient response to line and load  
changes without sacrificing stability. The device supports  
frequency synchronization, programmable multiphase  
operation and output voltage tracking for supply rail  
sequencing.  
Operation for High Efficiency at Light Load  
n
Soft-Start/Voltage Tracking  
n
Protection: Output Overvoltage and Overcurrent  
Foldback  
n
See LTM4649 for Up to 16V Operation  
IN  
n
9mm × 15mm × 4.92mm BGA Package  
Fault protection features include overvoltage protec-  
tion, overcurrent protection and thermal shutdown. The  
LTM4648 is offered in a small 9mm × 15mm × 4.92mm  
BGA package. The LTM4648 is RoHS compliant. For up  
applicaTions  
n
Telecom, Networking and Industrial Equipment  
n
Point of Load Regulation  
to 16V operation, see the LTM4649.  
IN  
L, LT, LTC, LTM, Burst Mode, µModule, PolyPhase, 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, 5705919, 5929620,  
6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending.  
Typical applicaTion  
Efficiency and Power Loss  
at 5V and 3.3V Input  
Current Derating, 5V to 1.5VOUT  
with No Heat Sink  
2.375V to 5.5V Input, 1.5V Output DC/DC  
µModule Regulator  
100  
95  
2.8  
2.4  
12  
V
1.5V  
10A  
OUT  
V
IN  
V
V
IN  
OUT  
2.375V TO 5.5V  
100µF  
6.3V  
×2  
22µF  
10V  
×2  
10  
8
DIFFP  
DIFFN  
90  
85  
80  
75  
70  
65  
2.0  
1.6  
1.2  
0.8  
0.4  
0
PINS NOT USED  
IN THIS CIRCUIT:  
LTM4648  
INTV  
SW  
CC  
MODE  
V
OUT_LCL  
6
DIFFOUT  
RUN  
PHMODE  
TEMP  
COMP  
PGOOD  
CLKIN  
CLKOUT  
TRACK/SS  
V
FB  
4
GND  
0.1µF  
6.65k  
400LFM  
200LFM  
0LFM  
2
4648 TA01a  
V
V
= 3.3V  
= 5V  
IN  
IN  
0
0
2
4
6
8
10  
0
40  
60  
80  
100  
120  
20  
AMBIENT TEMPERATURE (°C)  
LOAD CURRENT (A)  
4648 TA01b  
4648f  
1
For more information www.linear.com/LTM4648  
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