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LTC3375

更新时间： 2023-12-20 18:44:48
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
36页 504K
描述
8 通道、可编程、可并联 1A 降压型 DC/DC 转换器

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中文翻译

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LTC3375 数据手册

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LTC3375  
8-Channel Programmable,  
Parallelable 1A Buck DC/DCs  
FeaTures  
DescripTion  
The LTC®3375 is a digitally programmable high efficiency  
multioutput power supply IC. The DC/DCs consist of eight  
n
8-Channel Independent Step-Down DC/DCs  
n
Master-Slave Configurable for Up to 4A Per Output  
Channel with a Single Inductor  
synchronous buck converters (I  
powered from independent 2.25V to 5.5V input supplies.  
up to 1A each) all  
OUT  
n
Independent V Supply for Each DC/DC  
IN  
(2.25V to 5.5V)  
DC/DC enables, output voltages, operating modes, and  
phasing may all be independently programmed over I C  
or used in standalone mode via simple I/O with power-up  
defaults. The DC/DCs may be used independently or in  
parallel to achieve higher output currents of up to 4A per  
output with a shared inductor. Alarm levels for high die  
n
All DC/DCs Have 0.425V to V Output Voltage Range  
IN  
2
n
Precision Enable Pin Thresholds for Autonomous  
2
Sequencing (or I C Control)  
n
1MHz to 3MHz Programmable/Synchronizable  
Oscillator Frequency (2MHz Default)  
2
n
n
I C Selectable Phasing (90° Steps) Per Channel  
2
temperaturemayalsobeprogrammedviaI Cwithamask-  
able IRQ output for monitoring DC/DC and system faults.  
Programmable Power-On Reset/Watch Dog/  
Pushbutton Timing  
n
n
Pushbutton ON/OFF/RESET control, power-on reset, and  
a watchdog timer provide flexible and reliable power-up  
sequencingandsystemmonitoring. TheLTC3375isavail-  
able in a low profile 48-lead 7mm × 7mm QFN package.  
Die Temperature Monitor Output  
48-Lead (7mm × 7mm) QFN Package  
applicaTions  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
n
General Purpose Multichannel Power Supplies  
Industrial/Automotive/Communications  
n
Typical applicaTion  
8-Channel 1A Multioutput Buck Regulator  
4V TO 40V  
2.2µH  
V
SW1  
IN1  
Buck Efficiency vs Load  
0.425V TO V  
UP TO 1A  
IN1  
V
V
SHNT  
10µF  
10µF  
100  
90  
ALWAYS-ON  
LDO  
CC  
FB1  
MASTER  
2.2µH  
LTC3375  
CC  
1A BUCK  
2A BUCK  
3A BUCK  
4A BUCK  
80  
FBV  
ON  
70  
V
SW2  
IN2  
SLAVE  
0.425V TO V  
UP TO 1A  
IN2  
KILL  
PB  
60  
50  
PB  
FB2  
40  
30  
20  
10  
0
EN1  
EN2  
EN3  
EN4  
EN5  
EN6  
EN7  
EN8  
RST  
TEMP  
WDI  
WD0  
IRQ  
Burst Mode OPERATION  
MASTER  
2.2µH  
V
V
f
= 3.3V  
IN  
OUT  
•
•
= 1.8V  
•
= 2MHz  
OSC  
V
SLAVE  
IN7  
L = 2.2µH  
0.425V TO V  
UP TO 1A  
IN7  
SW7  
1
10  
100  
1000  
10µF  
10µF  
LOAD CURRENT (mA)  
FB7  
3375 TA01b  
MASTER  
2.2µH  
V
SLAVE  
IN8  
0.425V TO V  
UP TO 1A  
IN8  
SW8  
2
2
I C  
SYNC  
FB8  
CT  
RT  
3375 TA01a  
3375fd  
1
For more information www.linear.com/3375  
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