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LTM4615IV

更新时间： 2024-11-05 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 408K
描述
Triple Output, Low Voltage DC/DC μModule Regulator

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中文翻译

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LTM4615IV 数据手册

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LTM4615  
Triple Output, Low Voltage  
DC/DC µModule Regulator  
FEATURES  
DESCRIPTION  
TheLTM®4615isacomplete4Adualoutputswitchingmode  
DC/DC power supply plus an additional 1.5A VLDO (very  
low dropout) linear regulator. Included in the package 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.  
TheLTM4615supportsoutputvoltagesrangingfrom0.8V  
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
Dual 4A Output Power Supply with 1.5A VLDO™  
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
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  
n
VLDO, 0.4V to 2.6V, 1.5A Output  
n
VLDO, 40dB Supply Rejection at f  
1% Total DC Output Error  
Small and Very Low Profile Package:  
15mm × 15mm × 2.82mm  
SW  
n
n
APPLICATIONS  
Additional features include overvoltage protection,  
foldback overcurrent 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 Pb-free and  
RoHS compliant.  
n
Telecom and Networking Equipment  
n
Industrial Power Systems  
n
Low Noise Applications  
FPGA, SERDES Power  
n
L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of  
Linear Technology Corporation. VLDO is a trademark 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  
89  
87  
85  
83  
81  
79  
77  
75  
V
= 3.3V  
IN  
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
FB1  
TRACK1  
RUN/SS1  
LDO_IN  
EN3  
V
OUT1  
OUT2  
FB2  
V
OUT3  
1V  
LTM4615  
GND2  
22μF  
6.3V  
22μF  
6.3V  
V
TRACK2  
RUN/SS2  
LDO_OUT  
FB3  
PGOOD3  
V
IN  
IN  
(V = 1.2V)  
IN  
10k  
5.76k  
V
OUT3  
1V AT 1A  
1.2V  
100μF  
6.3V  
100μF  
6.3V  
10μF  
6.3V  
PGOOD3  
3.32k  
10μF  
GND1  
GND3  
10k  
0
1
2
3
4
4615 TA01a  
V
LOAD CURRENT (A)  
OUT3  
4615 TA01b  
4615f  
1
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