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LTC3886-1

更新时间： 2024-02-10 20:38:22
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
26页 1853K
描述
60V Dual Output Step-Up Controller with Digital Power System Management

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LTC3886-1 数据手册

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LTC7883  
Quad Output PolyPhase  
Step-Down DC/DC Voltage Mode Controller  
with Digital Power System Management  
FEATURES  
DESCRIPTION  
2
The LTC®7883 is a quad, PolyPhase DC/DC synchronous  
step-down switching regulator controller with PMBus  
compliant serial interface. It uses a constant frequency,  
leading-edge modulation, voltage mode architecture for  
excellent transient response and output regulation. Each  
PWM channel can produce output voltages from 0.1V  
to 5.25V using a wide range of 3.3V compatible power  
stages, including power blocks, DrMOS or discrete FET  
drivers. LTC7883 devices can operate in parallel, sup-  
porting ideal phasor positioning for PolyPhase rails up  
to 8-phases.  
n
PMBus/I C Compliant Serial Interface  
n
Monitor Voltage, Current, Temperature and Faults  
n
Program Voltage, Soft-Start/Stop, Sequencing,  
Margining, AVP and UV/OV/OC Limits  
n
3V ≤ VINSNS ≤ 38V, 0.1V (Limited by DrMOS  
t
) ≤ V  
≤ 5.25V  
ON_MIN  
OUT  
n
n
0.5ꢀ Output Voltage Error  
Programmable PWM Frequency or External Clock  
Synchronization from 250kHz to 2.5MHz  
Accurate PolyPhase® Current Sharing  
Internal EEPROM with Fault Logging and ECC  
IC Supply Range: 3V to 13.2V  
Resistor or Inductor DCR Current Sensing  
Power Good Output Voltage Monitor  
Supports Start-Up Into a Prebiased Load  
Optional Resistor Programming for Key Parameters  
99-Lead BGA Package (9mm × 7.5mm)  
n
n
n
n
n
n
n
n
System configuration and monitoring is supported by the  
LTpowerPlay® software tool. The LTC7883 serial interfaces  
can read back input voltage, output voltage and current,  
temperature and fault status. Most operating parameters  
can be set via the digital interfaces or stored in internal  
EEPROM for use at power-up. Switching frequency and  
phase, output voltage and device address can also be set  
using external configuration resistors.  
APPLICATIONS  
n
High Current Distributed Power Systems  
All registered trademarks and trademarks are the property of their respective owners. Protected  
by U.S. patents, including 5396245, 5859606, 6144194, 6937178, 7420359 and 7000125.  
n
Servers, Network and Storage Equipment  
n
Intelligent Energy Efficient Power Regulation  
TYPICAL APPLICATION  
V
IN  
7V TO 13.2V  
V
VINSA  
CCA  
V
SNSA0P  
FBA0  
V
FDMF5820DC  
PWM  
IN  
Load Step Transient Current Sharing  
1/2 LTC7883  
L0  
V
(Using FDMF5820DC DrMOS)  
SDA_A  
SCL_A  
ALERTA  
RUNA0  
RUNA1  
OUT  
SW  
1V  
COMPA0  
COMPA1  
PWMA0  
TSNSA0  
100A  
TO/FROM  
MCU  
I
OUT  
10A/DIV  
GND  
PGA0  
FLTA0  
CSA0P  
CSA0M  
TO/FROM  
PGA1  
V
SNSA1P  
EXTERNAL DEVICES  
FLT1A1  
SYNCA  
CLKA  
CSA1M  
CSA1P  
I
, I  
L0 L1  
10A/DIV  
FDMF5820DC  
PWM  
V
IN  
7883 TA01b  
L1  
IAVGA0  
IAVGA1  
50µs/DIV  
SW  
PWMA1  
TSNSA1  
IAVGNDA  
GND  
V
V
SNSA0M  
SNSA1M  
7883 TA01a  
GND  
INDUCTORS: COOPER FP1007R1-R22  
SOME DETAILS OMITTED FOR CLARITY  
Rev. 0  
1
Document Feedback  
For more information www.analog.com  
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