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LTM4615

更新时间： 2024-09-16 14:58:15
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
24页 518K
描述
三路输出、低电压 DC/DC μModule 稳压器

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中文翻译

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LTM4615 数据手册

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LTM4615  
Triple Output, Low Voltage  
DC/DC µModule Regulator  
FeaTures  
DescripTion  
n
Dual 4A Output Power Supply with 1.5A VLDO™  
The LTM®4615 is a complete 4A dual output switching  
mode DC/DC power supply plus an additional 1.5A VLDO  
(very low dropout) linear regulator. Included in the pack-  
age are the switching controllers, power FETs, inductors,  
a 1.5A regulator and all support components. The dual 4A  
DC/DC converters operate over an input voltage range of  
2.375V to 5.5V, and the VLDO operates from a 1.14V to  
3.5V input. The LTM4615 supports output voltages rang-  
ing from 0.8V to 5V for the DC/DC converters, and 0.4V  
to 2.6V for the VLDO. The three regulator output voltages  
are set by a single resistor for each output. Only bulk input  
and output capacitors are needed to complete the design.  
n
Short-Circuit and Overtemperature Protection  
Power Good Indicators  
n
Switching Regulators Section—Current Mode Control  
n
Input Voltage Range: 2.375V to 5.5V  
n
4A DC Typical, 5A Peak Output Current Each  
n
0.8V Up to 5V Output Each, Parallelable  
n
2% Total DC Output Error  
n
Output Voltage Tracking  
n
Up to 95% Efficiency  
n
Programmable Soft-Start  
VLDO Section  
n
n
n
n
n
The low profile package (2.82mm) enables utilization of  
unused space on the bottom of PC boards for high density  
point of load regulation. High switching frequency and a  
current mode architecture enables a very fast transient  
response to line and load changes without sacrificing  
stability. The device supports output voltage tracking for  
supply rail sequencing.  
VLDO, 1.14V to 3.5V Input Range  
VLDO, 0.4V to 2.6V, 1.5A Output  
VLDO, 40dB Supply Rejection at f  
1% Total DC Output Error  
SW  
Small and Very Low Profile Package:  
15mm × 15mm × 2.82mm  
applicaTions  
Additional features include overvoltage protection, over-  
current protection, thermal shutdown and programmable  
soft-start. The power module is offered in a space saving  
and thermally enhanced 15mm × 15mm × 2.82mm LGA  
package. The LTM4615 is RoHS compliant with Pb-free  
finish.  
n
n
n
n
Telecom and Networking Equipment  
Industrial Power Systems  
Low Noise Applications  
FPGA, SERDES Power  
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered  
trademarks and VLDO and LTpowerCAD are trademarks 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, 6724174.  
Typical applicaTion  
Efficiency vs Output Current  
1.2V at 4A, 1.5V at 4A and 1V at 1A DC/DC µModule® Regulator  
91  
V
IN  
= 3.3V  
89  
87  
85  
83  
81  
79  
77  
75  
V
3V TO 5.5V  
IN  
PGOOD1  
10µF  
6.3V  
PGOOD2  
10µF  
6.3V  
V
OUT2  
1.5V  
V
V
IN2  
PGOOD2  
IN1  
PGOOD1  
10k  
10k  
V
1.5V  
4A  
V
OUT2  
OUT1  
1.2V  
4A  
V
OUT1  
1.2V  
V
V
OUT2  
FB2  
OUT1  
V
OUT3  
1V  
LTM4615  
GND2  
FB1  
22µF  
6.3V  
(V = 1.2V)  
IN  
22µF  
6.3V  
V
TRACK1  
RUN/SS1  
LDO_IN  
EN3  
TRACK2  
RUN/SS2  
LDO_OUT  
FB3  
PGOOD3  
V
IN  
IN  
10k  
5.76k  
V
OUT3  
1V AT 1A  
1.2V  
100µF  
6.3V  
100µF  
6.3V  
10µF  
6.3V  
PGOOD3  
3.32k  
0
1
2
3
4
10µF  
GND1  
GND3  
10k  
4615 TA01a  
OUTPUT CURRENT (A)  
V
OUT3  
4615 TA01b  
4615fb  
1
For more information www.linear.com/LTM4615  
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