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LTM4612MPV PDF预览

LTM4612MPV

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 365K
描述
Ultralow Noise 36VIN, 15VOUT, 5A, DC/DC μModule

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中文翻译

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LTM4612MPV 数据手册

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LTM4612  
Ultralow Noise  
36V , 15V , 5A,  
IN  
OUT  
Module  
DC/DC  
µ
FEATURES  
DESCRIPTION  
The LTM®4612 is a complete, ultralow noise, high voltage  
inputandoutput,5AswitchingmodeDC/DCpowersupply.  
Includedinthepackagearetheswitchingcontroller,power  
FETs, inductor and all support components. Operating  
over an input voltage range of 5V to 36V, the LTM4612  
supports an output voltage range of 3.3V to 15V, set by a  
single resistor. Only bulk input and output capacitors are  
needed to finish the design.  
n
Complete Low EMI Switch Mode Power Supply  
n
CISPR 22 Class B Compliant  
n
Wide Input Voltage Range: 5V to 36V  
n
5A DC, 7A Peak Output Current  
n
3.3V to 15V Output Voltage Range  
n
Low Input and Output Referred Noise  
n
Output Voltage Tracking and Margining  
n
PLL Frequency Synchronization  
n
1.5% Set Point Accuracy  
High switching frequency and an adaptive on-time current  
mode architecture enables a very fast transient response  
to line and load changes without sacrificing stability.  
n
Power Good Tracks with Margining  
n
Current Foldback Protection (Disabled at Start-Up)  
n
Parallel/Current Sharing  
n
The onboard input filter and noise cancellation circuits  
achieve low noise coupling, thus effectively reducing the  
electromagnetic interference (EMI)—see Figures 4 and 8.  
Furthermore, the DC/DC μModuleTM can be synchronized  
with an external clock for reducing undesirable frequency  
harmonics and allows PolyPhase® operation for high load  
currents.  
Ultrafast Transient Response  
n
Current Mode Control  
n
Programmable Soft-Start  
n
Output Overvoltage Protection  
n
–55°C to 125°C Operating Temperature Range  
(LTM4612MPV)  
n
Small Surface Mount Footprint, Low Profile  
(15mm × 15mm × 2.8mm) LGA Package  
The LTM4612 is offered in a space saving and thermally  
enhanced 15mm × 15mm × 2.8mm LGA package, which  
enables utilization of unused space on the bottom of PC  
boards for high density point-of-load regulation. The  
LTM4612 is Pb-free and RoHS compliant.  
APPLICATIONS  
n
Telecom and Networking Equipment  
n
Industrial and Avionic Equipment  
n
RF Systems  
, LT, LTC, LTM and PolyPhase 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 at 12V Output  
12V/5A Ultralow Noise μModule with 22V to 36V Input  
100  
95  
CLOCK SYNC  
V
IN  
22V  
90  
TO 36V  
2M  
100k  
V
PLLIN  
V
12V  
5A  
IN  
85  
80  
75  
70  
65  
60  
55  
50  
OUT  
V
OUT  
PGOOD  
RUN  
LTM4612  
100pF  
5.23k  
C
OUT  
COMP  
V
FB  
INTV  
DRV  
CC  
CC  
C
IN  
FCB  
f
SET  
MARG0  
MARG1  
MPGM  
MARGIN  
CONTROL  
TRACK/SS  
V
D
24V 12V  
IN  
OUT  
OUT  
OUT  
0.01μF  
28V 12V  
IN  
10μF  
392k  
5% MARGIN  
36V 12V  
IN  
SGND PGND  
0
1
2
3
4
5
4612 TA01  
OUTPUT CURRENT (A)  
4612 TA01b  
4612f  
1
1234567...24

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