LTC3882-1LTC3882-2 Series

Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Catalog

Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Part	Output Configuration	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Frequency - Switching	Output Phases	Supplier Device Package	Control Features	Output Type	Mounting Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Serial Interfaces	Package / Case	Duty Cycle (Max) [Max]	Topology	Function
Analog Devices LTC3882EUJ-1#TRPBF	Positive	2	-40 °C	125 ¯C	500 kHz	2	40-QFN (6x6)	Enable Frequency Control Phase Control Power Good	PWM Signal	Surface Mount	13.8 V	3 V	I2C PMBus	40-WFQFN Exposed Pad	87.5 %	Buck	Step-Down
Analog Devices LTC3882IUJ-1#PBF	Positive	2	-40 °C	125 ¯C	500 kHz	2	40-QFN (6x6)	Enable Frequency Control Phase Control Power Good	PWM Signal	Surface Mount	13.8 V	3 V	I2C PMBus	40-WFQFN Exposed Pad	87.5 %	Buck	Step-Down
Analog Devices LTC3882IUJ#TRPBF	Positive	2	-40 °C	125 ¯C	500 kHz	2	40-QFN (6x6)	Enable Phase Control	PWM Signal	Surface Mount	13.8 V	3 V	I2C PMBus	40-WFQFN Exposed Pad	87.5 %	Buck	Step-Down
Analog Devices LTC3882BIUJ	Positive	2	-40 °C	125 ¯C	500 kHz	2	40-QFN (6x6)	Enable Phase Control	PWM Signal	Surface Mount	13.8 V	3 V	I2C PMBus	40-WFQFN Exposed Pad	87.5 %	Buck	Step-Down

Catalog

Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Key Features

• PMBus/I2C Compliant Serial InterfaceMonitor Voltage, Current, Temperature and FaultsDigitally Programmable Voltage, Current Limit, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV Thresholds

• Monitor Voltage, Current, Temperature and Faults

• Digitally Programmable Voltage, Current Limit, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV Thresholds

• 3V ≤ VINSNS ≤ 38V, 0.5V ≤ VOUT≤ 5.25V

• ±0.5% Output Voltage Accuracy

• Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz

• Accurate PolyPhase®Current Sharing

• Internal EEPROM with Fault Logging and ECC

• IC Supply Range: 3V to 13.2V

• Resistor or Inductor DCR Current Sensing

• Optional Resistor Programming for Key Parameters

• 40-Pin (6mm × 6mm) QFN Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LTC3882-1/LTC3882-2 is a dual, 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. Up to four LTC3882-1 devices can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation.System configuration and monitoring is supported by the LTpowerPlay™software tool. The LTC3882-1/LTC3882-2 serial interface can read back input voltage, output voltage and current, temperature and fault status. Most operating parameters can be set via the digital interface 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.PWM Enable OutputTG/BG ControlHW Write ProtectDedicated PGOODDifferential VOUTSenseMax PWM FrequencyLTC3882YesYesYesNoVOUT0Only1.25MHzLTC3882-1NoNoNoYesVOUT0& VOUT11.25MHzLTC3882-2NoNoNoYesVOUT0& VOUT12.5MHzAPPLICATIONSHigh Current Distributed Power SystemsServers, Network and Storage EquipmentIntelligent Energy Efficient Power Regulation