LTC3880 Series

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

Catalog

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

Part	Serial Interfaces	Topology	Control Features	Output Phases	Output Configuration	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Function	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Type	Supplier Device Package	Number of Outputs
Analog Devices LTC3880EUJ-1#TRPBF	I2C PMBus	Buck	Enable Frequency Control	2	Positive	40-WFQFN Exposed Pad	105 °C	-40 °C	Surface Mount	Step-Down	4.5 V	24 V	Transistor Driver	40-QFN (6x6)	2
Analog Devices LTC3880IUJ-1#PBF	I2C PMBus	Buck	Enable Frequency Control	2	Positive	40-WFQFN Exposed Pad	125 ¯C	-40 °C	Surface Mount	Step-Down	4.5 V	24 V	Transistor Driver	40-QFN (6x6)	2
Analog Devices LTC3880IUJ-1#TRPBF	I2C PMBus	Buck	Enable Frequency Control	2	Positive	40-WFQFN Exposed Pad	125 ¯C	-40 °C	Surface Mount	Step-Down	4.5 V	24 V	Transistor Driver	40-QFN (6x6)	2
Analog Devices LTC3880EUJ#PBF	I2C PMBus	Buck	Enable Frequency Control	2	Positive	40-WFQFN Exposed Pad	105 °C	-40 °C	Surface Mount	Step-Down	4.5 V	24 V	Transistor Driver	40-QFN (6x6)	2
Analog Devices LTC3880EUJ-1#PBF	I2C PMBus	Buck	Enable Frequency Control	2	Positive	40-WFQFN Exposed Pad	105 °C	-40 °C	Surface Mount	Step-Down	4.5 V	24 V	Transistor Driver	40-QFN (6x6)	2

Catalog

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

Key Features

• PMBus/I2C Compliant Serial Interface

• Telemetry Read Back includes VIN, IIN, VOUT, IOUT, Temperature and Faults

• Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV and Frequency Synchronization (250kHz to 1MHz)

• ±0.5% Output Voltage Accuracy Over Temperature

• Integrated 16-Bit ADC

• Internal EEPROM with ECC and Fault Logging

• Integrated Powerful N-Channel MOSFET Gate Drivers

• Wide VINRange: 4.5V to 24V

• VOUTRange: 0.5V to 5.4V (4V on VOUT0)

• Analog Current Mode Control Loop

• Accurate PolyPhase®Current Sharing for Up to 6 Phases

• Available in a 40-Pin (6mm × 6mm) QFN Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LTC3880/LTC3880-1 are dual, PolyPhase DC/DC synchronous step-down switching regulator controllers with an I2C-based PMBus compliant serial interface. The controllers use a constant frequency, current mode architecture that is supported by LTpowerPlay™software development tool with graphical user interface (GUI).Switching frequency, output voltage, and device address can be programmed using external configuration resistors. Parameters can be set via the digital interface or stored in EEPROM. Voltage, current, internal/external temperature and fault status can be read back through the bus interface. The LTC3880 incorporates a 5V linear regulator while the LTC3880-1 uses an external 5V supply for minimum power loss. See comparison to LTC3887 below.VOUTStart-Up TimeMax VOUT0/1Fast ADC Mode for 1 ParameterLTC3887/LTC3887-135ms5.5V/5.5VNoLTC3880/LTC3880-1120ms4V/5.4VNoApplicationsHigh Current Distributed Power SystemsTelecom, Datacom and Storage SystemsIntelligent Energy Efficient Power Regulation