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LTM4601A

更新时间： 2024-11-29 05:44:07
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 366K
描述
12A DC/DC μModules with PLL, Output Tracking and Margining

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LTM4601A 数据手册

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LTM4601A/LTM4601A-1  
12A DC/DC µModules  
with PLL, Output Tracking  
and Margining  
FEATURES  
DESCRIPTION  
TheLTM®4601Aisacomplete12Astep-downswitchmode  
DC/DC power supply with onboard switching controller,  
MOSFETs, inductor and all support components. The  
μModule™ is housed in a small surface mount 15mm  
× 15mm × 2.8mm LGA package. The LTM4601A LGA  
package is designed with redundant mounting pads to  
enhance solder-joint strength for extended temperature  
cycling endurance. Operating over an input voltage range  
of 4.5 to 20V, the LTM4601A supports an output voltage  
range of 0.6V to 5V as well as output voltage tracking  
and margining. The high efficiency design delivers 12A  
continuouscurrent(14Apeak). Onlybulkinputandoutput  
capacitors are needed to complete the design.  
n
Complete Switch Mode Power Supply  
n
Wide Input Voltage Range: 4.5V to 20V  
n
12A DC Typical, 14A Peak Output Current  
n
0.6V to 5V Output Voltage  
Output Voltage Tracking and Margining  
n
n
Redundant Mounting Pads for Enhanced Solder-  
Joint Strength  
n
Parallel Multiple μModules for Current Sharing  
n
Differential Remote Sensing for Precision  
Regulation (LTM4601A Only)  
n
PLL Frequency Synchronization  
n
1.5ꢀ Total DC Error  
n
Current Foldback Protection (Disabled at Start-Up)  
n
Pb-Free (e4) RoHS Compliant Package with Gold  
The low profile (2.8mm) and light weight (1.7g) package  
easilymountsonthebacksideofPCboards. TheμModule  
can be synchronized with an external clock for reducing  
undesirable frequency harmonics and allows PolyPhase®  
operation for high load currents.  
Finish Pads  
n
UltraFast™ Transient Response  
n
Current Mode Control  
n
Up to 95% Efficiency at 5V , 3.3V  
IN  
OUT  
n
n
n
Programmable Soft-Start  
Anonboarddifferentialremotesenseamplifiercanbeused  
to accurately regulate an output voltage independent of  
load current. The onboard remote sense amplifier is not  
available in the LTM4601A-1.  
Output Overvoltage Protection  
Enhanced (15mm × 15mm × 2.8mm) Surface Mount  
LGA Package  
L, LT, LTC, LTM and PolyPhase are registered trademarks of Linear Technology Corporation.  
μModule and UltraFast are trademarks of Linear Technology Corporation. All other trademarks  
are the property of their respective owners. Protected by U.S. Patents including 5481178,  
5847554, 6304066, 6476589, 6580258, 6677210, 6774611.  
APPLICATIONS  
n
Telecom and Networking Equipment  
n
Servers  
TYPICAL APPLICATION  
Efficiency and Power Loss  
vs Load Current  
1.5V/12A Power Supply with 4.5V to 20V Input  
95  
90  
85  
80  
75  
70  
65  
60  
55  
50  
4.0  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
CLOCK SYNC  
EFFICIENCY  
5V  
IN  
V
IN  
4.5V TO 20V  
TRACK/SS CONTROL  
V
PLLIN TRACK/SS  
V
1.5V  
12A  
IN  
OUT  
12V  
IN  
PGOOD  
V
OUT  
100pF  
V
FB  
ON/OFF  
RUN  
COMP  
INTV  
DRV  
MARG0  
MARG1  
MARGIN  
CONTROL  
12V  
IN  
C
OUT  
LTM4601A  
C
IN  
5V  
IN  
V
CC  
OUT_LCL  
DIFFV  
CC  
OUT  
+
MPGM  
SGND PGND  
V
V
OSNS  
–
POWER LOSS  
OSNS  
R1  
392k  
f
SET  
R
SET  
40.2k  
5% MARGIN  
0
2
4
6
8
10  
12  
14  
4601A TA01a  
LOAD CURRENT (A)  
4601A TA01b  
4601afb  
1
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