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LTM4676

更新时间： 2024-02-05 18:11:17
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
32页 746K
描述
Triple Output 5A/5A/4A Step-Down DC/DC μModule® Regulator

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LTM4676 数据手册

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LTM4634  
Triple Output 5A/5A/4A  
Step-Down DC/DC  
®
µModule Regulator  
FeaTures  
DescripTion  
The LTM®4634 integrates three complete 5A/5A/4A high  
efficiencyswitchingmodeDC/DCconvertersintoonesmall  
package.Switchingcontrollers,powerFETs,inductors,and  
mostsupportcomponentsareincluded.Operatingoveran  
inputvoltagerangeof4.75Vto28V, theLTM4634provides  
n
Three Independent High Efficiency Regulator  
Channels  
OUT1,2  
n
I
= 5A, I  
= 4A  
OUT3  
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Input Voltage Range: 4.75V to 28V  
Independent V for Each Channel  
IN  
V
V
Voltage Range: 0.8V to 5.5V  
three independent output voltages. V  
adjustable from 0.8V to 5.5V, while V  
from 0.8V to 13.5V. Each output voltage is set by a single  
external resistor.  
and V  
OUT3  
are  
OUT1,2  
OUT1  
OUT2  
is adjustable  
Voltage Range: 0.8V to 13.5V  
OUT3  
1.5ꢀ ꢁaꢂiꢃuꢃ Total DC Output Error  
Current ꢁode Control/Fast Transient Response  
Frequency Synchronization  
Highswitchingfrequencyandacurrentmodearchitecture  
enable a very fast transient response to line and load  
changes without sacrificing stability. The device supports  
frequency synchronization, multiphase parallel opera-  
tion, soft-start and output voltage tracking for supply rail  
sequencing.  
Output Overvoltage and Overcurrent Protection  
PolyPhase® Operation with Current Sharing  
General Purpose Teꢃperature ꢁonitors  
Soft-Start/Voltage Tracking  
Power Good Monitors  
SnPb or RoHS Compliant Finish  
15mm × 15mm × 5.01mm BGA Package  
Fault protection features include overvoltage protection,  
overcurrent protection and temperature monitoring. The  
power module is offered in a space saving, thermally  
enhanced 15mm × 15mm × 5.01mm BGA package. The  
LTM4634 is available with SnPb (BGA) or RoHS compliant  
terminal finish.  
applicaTions  
n
Telecom, Networking and Industrial Equipment  
High Density Point of Load Voltage Regulation  
n
L, LT, LTC, LTM, µModule, PolyPhase, Burst Mode, Linear Technology and the Linear logo  
are registered trademarks and PowerPath, LTpowerCAD 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, 5705919, 5929620, 6100678, 6144194,  
6177787, 6304066, 6580258 and 8163643. Other patents pending.  
Typical applicaTion  
24V Input to 3.3V, 5V and 12V Output Regulator  
24V Input Efficiency  
100  
95  
90  
85  
80  
75  
70  
65  
60  
5V  
24V  
IN  
4.7µF  
6.3V  
2Ω  
40k  
10k  
10k  
V
V
V
IN3  
EXTV  
INTV  
FREQ/PLLLPF  
CC  
IN1  
IN2  
CC  
CNTL_PWR  
RUN1  
PGOOD12  
PGOOD3  
3.3V  
5V  
V
V
V
OUT1  
RUN2  
19.1k  
1µF  
V
RUN3  
FB1  
LTM4634  
TK/SS1  
TK/SS2  
TK/SS3  
OUT2  
11.5k  
4.32k  
V
= 5V  
EXTVCC  
V
FB2  
24V to 3.3V EFF (750kHz) CH1  
24V to 5V EFF (750kHz) CH2  
24V to 12V EFF (750kHz) CH3  
12V  
OUT3  
V
FB3  
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0  
MODE/PLLIN GND SGND  
LOAD CURRENT (A)  
4634 TA01a  
4634 TA01b  
4634f  
1
For more information www.linear.com/LTM4634  
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