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LTC3884

更新时间： 2024-01-09 07:53:49
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
128页 4052K
描述
Dual Output PolyPhase Step-Down Controller with Sub-Milliohm DCR Sensing and Digital Power System Management

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中文翻译

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LTC3884 数据手册

 浏览型号LTC3884的Datasheet PDF文件第2页浏览型号LTC3884的Datasheet PDF文件第3页浏览型号LTC3884的Datasheet PDF文件第4页浏览型号LTC3884的Datasheet PDF文件第5页浏览型号LTC3884的Datasheet PDF文件第6页浏览型号LTC3884的Datasheet PDF文件第7页 
LTC3884/LTC3884-1  
Dual Output PolyPhase  
Step-Down Controller with Sub-Milliohm DCR Sensing  
and Digital Power System Management  
FEATURES  
DESCRIPTION  
2
PMBus/I CCompliantSerialInterface  
The LTC®3884/LTC3884-1 are dual output PolyPhase DC/  
DCsynchronousstep-downswitchingregulatorcontrollers  
n
–TelemetryRead-BackIncludesV ,I ,V ,I  
TemperatureandFaults  
,
IN IN OUT OUT  
2
with an I C-based PMBus compliant serial interface. The  
–ProgrammableVoltage,CurrentLimit,DigitalSoft-  
Start/Stop,Sequencing,Margining,OV/UV/OC  
Sub-Milliohm DCR Current Sensing  
Digitally Adjustable Loop Compensation Parameters  
±±0.5OutputVoltageAccuracyOverTemperature  
IntegratedInputCurrentSenseAmplifier  
controllers employ a constant-frequency current mode  
architecture, together with a unique scheme to provide  
excellent performance for sub-milliohm DCR applica-  
tions. The LTC3884/LTC3884-1 are supported by the  
LTpowerPlay® software development tool with graphical  
user interface (GUI).  
n
n
n
n
n
n
InternalEEPROMwithECCandFaultLogging  
IntegratedN-ChannelMOSFETGateDrivers(LTC3884)  
Programmable loop compensation allows the controller  
to be compensated digitally. Switching frequency, channel  
phasing, output voltage, and device address can be pro-  
grammed both by the digital interface as well as external  
configuration resistors. Additionally, parameters can be set  
via the digital interface or stored in EEPROM. Both outputs  
haveindependentpowergoodindicatorsandFAULTfunction.  
The LTC3884 has integrated gate drivers. The LTC3884-1  
has three-state PWM pins to drive power blocks or DrMOS  
power stages.  
PowerConversion  
n
WideV Range:4.5Vto38V  
IN  
n
V
Range:0.5Vto3.5V(withLowDCRSetting);  
OUT  
0.5Vto5.5V(withoutLowDCRSetting)  
AccuratePolyPhase® CurrentSharingforUpto6Phases  
Availablein48-Lead7mm×7mmQFNand  
5mm×6mmGQFNPackages.  
n
n
APPLICATIONS  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. Patents including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 5408150,  
7420359, 8648623, 8786265, 8823352, 7000125. Licensed under U.S. Patent 7000125 and  
other related patents worldwide.  
n
Telecom, Datacom, and Storage Systems  
n
Industrial and Point-of-Load Applications  
TYPICAL APPLICATION  
1µF  
1Ω  
2mΩ  
V
IN  
Efficiency and Power Loss  
vs Load Current  
6V TO 15V  
10µF  
×2  
10µF  
×2  
4.7µF  
+
–
270µF  
×2  
INTV  
TG0  
V
IN  
I
I
CC  
IN  
IN  
TG1  
ꢀꢁꢁ  
ꢀꢁ  
8ꢀ  
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
4ꢀ  
ꢀ
ꢀ
4
3
ꢀ
ꢀ
ꢀ
0.1µF  
0.1µF  
BOOST0  
SW0  
BOOST1  
SW1  
DCR=0.32mΩ  
L=0.33µH  
DCR=0.32mΩ  
L=0.33µH  
ꢀ
ꢀ ꢁꢂꢃ  
ꢀꢁ  
BG0  
BG1  
ꢀ
ꢀ ꢁꢂ8ꢃ  
LTC3884*  
ꢀꢁꢂ  
ꢀꢁꢂꢃ ꢀꢁ  
SDA  
SCL  
FAULT0  
FAULT1  
ꢀꢀ  
3ꢀꢁꢂꢃꢄ  
f
ꢀꢁꢂ  
FAULT MANAGEMENT  
PMBus  
ALERT  
RUN0  
RUN1  
PGOOD0  
PGOOD1  
INTERFACE  
TO/FROM  
SHARE_CLK  
OTHER LTC DEVICES  
EXTV  
CC  
931Ω  
931Ω  
+
+
I
I
SENSE0  
SENSE1  
0.22µF  
0.22µF  
ꢀꢁꢁꢂꢃꢂꢀꢄꢃꢅ  
ꢀꢁꢂꢃꢄ ꢅꢁꢆꢆ  
–
–
I
I
V
V
SENSE0  
SENSE1  
OUT1  
OUT0  
1.8V  
30A  
+
+
–
1V  
V
V
V
V
SENSE0  
SENSE0  
SENSE1  
SENSE1  
–
ꢀ
ꢀ
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
ꢀꢁ  
3ꢀ  
30A  
ꢀꢁꢂꢃ ꢄꢅꢆꢆꢇꢈꢉ ꢊꢂꢋ  
TSNS0  
TSNS1  
TH1  
THR1  
DD25  
3884 ꢀꢁꢂꢃꢄ  
I
I
V
I
TH0  
THR0  
DD33  
330µF  
×2  
330µF  
×2  
I
PGND SGND V  
10nF  
4700pF  
220pF  
2200pF  
1µF 220pF  
10nF  
1µF  
*SOME DETAILS OMITTED FOR CLARITY  
3884 TA01a  
3884fe  
1
For more information www.linear.com/LTC3884  
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