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LTM4619IV

更新时间： 2024-10-02 05:44:07
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
24页 295K
描述
Dual, 26VIN, 4A DC/DC μModule Regulator

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中文翻译

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LTM4619IV 数据手册

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LTM4619  
Dual, 26V , 4A DC/DC  
IN  
µModule Regulator  
FEATURES  
DESCRIPTION  
The LTM®4619 is a complete dual 4A step-down switch-  
ing mode DC/DC power supply. Included in the package  
are the switching controller, power FETs, inductor, and all  
supportcomponents. Operatingoverinputvoltageranges  
of 4.5V to 26.5V, the LTM4619 supports two outputs with  
voltage ranges of 0.8V to 5V, each set by a single external  
resistor. Its high efficiency design delivers 4A continuous  
current (5A peak) for each output.  
n
Complete Standalone Power Supply  
n
Wide Input Voltage Range: 4.5V to 26.5V  
(EXTV Available for V ≤ 5.5V)  
CC  
IN  
n
Dual 180° Out-of-Phase Outputs with 4A DC  
Typical, 5A Peak Output Current for Each  
n
n
n
n
n
n
n
n
n
n
n
Dual Outputs with 0.8V to 5V V  
Output Voltage Tracking  
Range  
OUT  
1.5ꢀ Total DC Output Error  
Current Mode Control/Fast Transient Response  
Power Good  
Highswitchingfrequencyandacurrentmodearchitecture  
enable a very fast transient response to line and load  
changes without sacrificing stability. The two outputs are  
interleavedwith180°phasetominimizetheripplenoiseand  
reduce the I/O capacitors. The device supports frequency  
synchronization and output voltage tracking for supply  
rail sequencing. Burst Mode operation or pulse-skipping  
mode can be selected for light load operations.  
Phase-Lockable Fixed Frequency 250kHz to 780kHz  
On Board Frequency Synchronization  
Parallel Current Sharing  
Selectable Burst Mode® Operation  
Output Overvoltage Protection  
Small Surface Mount Footprint, Low Profile  
(15mm × 15mm × 2.8mm) LGA Package  
Fault protection features include overvoltage protection,  
overcurrent protection and foldback current limit for  
short-circuit protection.  
APPLICATIONS  
n
Telecom and Networking Equipment  
The low profile package (2.8mm) enables utilization of  
unused space on the bottom of PC boards for high density  
point of load regulation. The power module is offered in a  
space saving and thermally enhanced 15mm × 15mm ×  
2.8mm LGA package. The LTM4619 is Pb-free and RoHS  
compliant.  
n
Servers  
n
Storage Cards  
ATCA Cards  
Industrial Equipment  
Point of Load Regulation  
n
n
n
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and μModule are registered  
trademarks of Linear Technology Corporation. All other trademarks are the property of their  
respective owners.  
TYPICAL APPLICATION  
Dual 4A 3.3V/2.5V DC/DC μModule® Regulator  
Efficiency and Power Loss at 12V input  
95  
90  
85  
80  
75  
70  
65  
60  
55  
2.0  
1.5  
1.0  
0.5  
0
EFFICIENCY  
MODE/PLLIN INTV  
CC  
FREQ/PLLFLTR  
5.5V TO 26.5V  
V
V
IN  
10μF  
28k  
19.1k  
22pF  
s2  
V
FB1  
FB2  
22pF  
COMP1  
COMP2  
V
V
OUT2  
3.3V/4A  
OUT1  
LTM4619  
V
V
OUT2  
OUT1  
2.5V/4A  
100μF  
100μF  
TK/SS1  
RUN1  
TK/SS2  
RUN2  
POWER LOSS  
0.1μF  
0.1μF  
PGOOD  
EXTV  
CC  
2.5V  
3.3V  
OUT  
OUT  
SGND  
PGND  
4619 TA01a  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
4
LOAD CURRENT (A)  
4619 TA01b  
4619f  
1
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