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LTC3888-1 PDF预览

LTC3888-1

更新时间: 2024-11-25 02:51:27
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
110页 2463K
描述
Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3888-1 数据手册

 浏览型号LTC3888-1的Datasheet PDF文件第2页浏览型号LTC3888-1的Datasheet PDF文件第3页浏览型号LTC3888-1的Datasheet PDF文件第4页浏览型号LTC3888-1的Datasheet PDF文件第5页浏览型号LTC3888-1的Datasheet PDF文件第6页浏览型号LTC3888-1的Datasheet PDF文件第7页 
LTC3888-1  
Dual Loop 8-Phase Step-Down DC/DC  
Controller with Digital Power System Management  
FEATURES  
DESCRIPTION  
2
The LTC®3888-1 is a PMBus-compliant dual loop DC/DC  
synchronous step-down switching regulator controller  
with eight expandable phases supporting a wide range of  
master/slave configurations. The controller uses constant  
frequency current mode architecture to provide excellent  
transient response and output regulation. Each PWM  
master is capable of producing output voltages from 0.3V  
to 3.45V with multiple phase configurations using DrMOS  
devices that provide an output current monitor.  
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PMBus/I C Compliant Serial Interface  
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Monitor Voltage, Current, Temperature and Faults  
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Digitally Program V , Margins, UV, OV, Current  
OUT  
Limit, Soft-Start/Stop and Sequencing  
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Expandable to >16 Phases  
External Resistor Divider Programs Output Voltage  
4.5V ≤ V ≤ 26.5V, 0.3V ≤ V  
≤ 3.45V  
IN  
OUT  
0.5ꢀ Output Voltage Accuracy  
Programmable PWM Loop Compensation  
Accurate PolyPhase® Current Sharing  
Internal EEPROM with ECC and Fault Logging  
DrMOS Output Current Monitor Interface  
DrMOS Temperature/Fault Bus Interface  
DrMOS Gate Drive Supply Monitor  
Output voltage is set with an external voltage divider.  
PMBus configuration and monitoring is supported by  
LTpowerPlay™ software. Programmable loop compen-  
sation and built-in load step emulation facilitate setting  
bandwidth based on input voltage and output load capaci-  
tance. PMBus commands allow read back of input volt-  
age, output voltage and current, and operating status.  
Operating parameters can be set via PMBus command or  
stored in internal EEPROM for use at power up. Switching  
frequency, phase configuration, output current limit and  
device address can also be set using external program-  
ming resistors.  
Load Step Emulation  
Internal or External PWM Clock from 250kHz to 1MHz  
52-Pin (5mm × 8mm) QFN Package  
AEC-Q100 Qualified for Automotive Applications  
APPLICATIONS  
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High Current Distributed Power Systems  
Servers, Network and Storage Equipment  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. Patents, including 7420359, 8786265, 8786268 and 8823352. Licensed under U.S.  
Patent 7000125 and other related patents worldwide.  
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SPI  
V
SET BY PMBus  
OPTIONAL  
OUT  
TYPICAL APPLICATION  
ADJUST ANALOG V  
CONTROL COMPENSATION  
FB  
OF V  
OF V  
ZERO  
OUT  
OUT  
Dual 4-phase PSM Rails  
ꢕꢓ ꢁꢖ ꢐꢗꢓ  
ꢔꢍ  
ꢘꢍꢖꢉꢔꢍꢑꢀꢙ  
LTC3888  
ꢐ.ꢐꢊꢋ  
ꢗ.ꢧꢊꢋ  
ꢆꢊꢋ  
LTC3888-1  
LTC3888-2  
ꢔꢍ  
ꢔꢍꢁꢓ  
ꢂꢂ  
ꢇꢖꢈꢛR ꢌꢁꢑꢎꢛ  
ꢇꢖꢈꢛR ꢌꢁꢑꢎꢛ  
ꢇꢈꢉ  
ꢇꢈꢉ  
ꢔꢉꢖꢍ  
ꢇꢈꢉꢆ  
ꢇꢈꢉ0  
ꢌꢛꢍꢌꢛ0  
ꢔꢍ  
ꢖꢚꢁꢆ  
ꢖꢚꢁ0  
ꢔꢍ  
0.ꢗꢓ ꢁꢖ  
0.ꢗꢓ ꢁꢖ  
ꢃ.ꢗꢕꢓ  
ꢌꢈ  
ꢔꢉꢖꢍ  
ꢔRꢛꢋ  
ꢌꢈ  
ꢌꢛꢍꢌꢛꢆ  
ꢃ.ꢗꢕꢓ  
ꢑꢁ ꢆꢐ0ꢑ  
Efficiency vs Load Current  
(8-Phase Using LTC7051)  
ꢂꢃꢄꢄꢄꢅꢆ  
Rꢛꢋ  
ꢎꢍꢏ  
ꢔRꢛꢋ  
ꢎꢍꢏ  
ꢑꢁ ꢆꢐ0ꢑ  
ꢁꢛꢉꢇ  
ꢁꢌꢍꢌ0  
ꢁꢛꢉꢇ  
ꢁꢌꢍꢌꢆ  
ꢀ00  
ꢀꢁ  
ꢀ0  
ꢀꢁ  
ꢀ0  
ꢀꢁ  
ꢀꢁꢂ ꢃ ꢄꢅꢀ  
ꢌꢛꢍꢌꢛꢆ  
ꢌꢛꢍꢌꢛꢆ  
ꢌꢛꢍꢌꢛ0  
ꢀꢁ ꢂ00ꢃꢄꢅ  
ꢌꢛꢍꢌꢛ0  
ꢏꢑꢖꢚꢁꢆ  
ꢏꢑꢖꢚꢁ0  
ꢋꢣ0  
ꢋꢣꢆ  
ꢌꢝꢍꢂ  
ꢇꢎꢖꢖꢏ0  
ꢇꢎꢖꢖꢏꢆ  
FAULT0  
FAULT1  
Rꢚꢍ0  
ꢇꢌꢉ  
ꢌꢞꢑRꢛꢏ  
ꢇꢔꢍꢌ  
ꢌꢂꢀ  
ꢌꢏꢑ  
ꢇꢉꢣꢤꢥ  
Rꢚꢍꢆ  
ꢍꢖꢁꢛꢜ ꢌꢖꢉꢛ ꢏꢛꢁꢑꢔꢀꢌ ꢖꢉꢔꢁꢁꢛꢏ ꢋꢖR ꢂꢀꢑRꢔꢁꢝ  
ꢖꢍꢈꢖ ꢖꢋ ꢛꢔꢎꢞꢁ ꢂꢞꢑꢍꢍꢛꢀꢌ ꢌꢞꢖꢈꢍ  
ꢌꢞꢑRꢛꢟꢂꢀꢠ ALERT  
0.ꢀꢁ  
0.ꢀꢁ  
ꢀ.0ꢁ  
ꢀ.ꢁꢂ  
ꢁꢞRꢆ  
ꢁꢞꢆ  
ꢁꢞR0  
ꢁꢞ0  
ꢐꢐ00ꢦꢋ  
ꢐꢐ00ꢦꢋ  
ꢆ00ꢦꢋ  
ꢆ00ꢦꢋ  
ꢏꢏꢃꢃ  
ꢏꢏꢐꢕ  
ꢆꢊꢋ  
ꢆꢊꢋ  
ꢎꢍꢏ  
ꢀ0  
0
ꢀ0  
ꢀꢁ0  
ꢀꢁ0  
ꢀꢁ0  
ꢀ00  
ꢃꢄꢄꢄꢆꢐ ꢁꢑ0ꢆꢒ  
ꢀꢁꢂꢃ ꢄꢅRRꢆꢇꢈ ꢉꢂꢊ  
ꢀꢁꢁꢁꢂꢃ ꢄ0ꢃ  
Rev. 0  
1
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