LTC3888IUHG-1#TRPBF

Analog Devices
LTC3888/3888-1 Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management FEATURES n n n n n n n n n n n n n PMBus/I2C Compliant Serial Interface n Monitor Voltage, Current, Temperature and Faults n Digitally Program V OUT, Margins, UV, OV, Current Limit, Soft-Start/Stop and Sequencing Expandable to >16 Phases 4.5V ≤ VIN ≤ 26.5V, 0.3V ≤ VOUT ≤ 3.45V ±0.5% Output Volt...
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Внешний вид серии LTC3888
Внешний вид серии LTC3888
 
 

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LTC3888/3888-1 Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management FEATURES n n n n n n n n n n n n n PMBus/I2C Compliant Serial Interface n Monitor Voltage, Current, Temperature and Faults n Digitally Program V OUT, Margins, UV, OV, Current Limit, Soft-Start/Stop and Sequencing Expandable to >16 Phases 4.5V ≤ VIN ≤ 26.5V, 0.3V ≤ VOUT ≤ 3.45V ±0.5% 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 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 n n High Current Distributed Power Systems Servers, Network and Storage Equipment The LTC®3888/3888-1 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. PMBus configuration and monitoring is supported by LTpowerPlay™ software. Programmable loop compensation and built-in load step emulation facilitate setting bandwidth based on input voltage and output load capacitance. PMBus commands allow read back of input voltage, 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 voltage (LTC3888), output current limit (LTC3888-1) and device address can also be set using external programming resistors. 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. TYPICAL APPLICATION AVS, SPI VOUT SET BY PMBus OPTIONAL ADJUST Resistor CONTROL COMPENSATION OF VOUT Divider OF VOUT ZERO Dual 4-phase PSM Rails VIN 5V TO 24V (NOMINAL) VOUT1 0.3V TO 3.45V AT 120A VIN INTVCC POWER STAGE PWM VIN PWM1 PWM0 SW IMON ISENSE1 ISENSE0 GND IREF TEMP IREF LTC3888-1 TSNS0 TSNS1 PSM SHARED PINS 2200pF 100pF 1µF LTC3888 2.2µF 4.7µF 1µF POWER STAGE PWM VIN IMON SW IREF GND • • VOUT0 0.3V TO 3.45V AT 120A VSENSE0+ VSENSE0– 100 DAOUT1 VFB1 DAOUT0 VFB0 95 SYNC FAULT0 FAULT1 PGOOD0 PGOOD1 90 PMBus NOTE: SOME DETAILS OMITTED FOR CLARITY ONLY TWO OF EIGHT CHANNELS SHOWN 1µF 100pF 2200pF • VIN = 12V AT 500KHZ 85 80 0.6V 0.8V 1.0V 1.8V 75 70 3888-1 TA01a • Efficiency vs Load Current (8-Phase Using LTC7051) TEMP VSENSE1+ VSENSE1– RUN0 SCL RUN1 SDA SHARE_CLK ALERT ITHR1 ITHR0 ITH0 ITH1 VDD25 VDD33 GND • LTC3888-1 EFFICIENCY (%) n DESCRIPTION 0 80 160 240 320 LOAD CURRENT (A) 400 3888-1 G01 Rev. A Document Feedback For more information www.analog.com 1 PDF
Документация на серию LTC3888 

LTC3888/3888-1 (Rev. A) Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management

Дата модификации: 15.07.2022

Размер: 2.51 Мб

118 стр.

    Публикации 1

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    24 января 2022
    статья

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