LTC3884LTC3884-1 Series

Dual Output PolyPhase Step-Down Controller with Sub-Milliohm DCR Sensing and Digital Power System Management

Catalog

Dual Output PolyPhase Step-Down Controller with Sub-Milliohm DCR Sensing and Digital Power System Management

Part	Mounting Type	Frequency - Switching [Max]	Frequency - Switching [Min]	Output Type	Control Features	Output Phases	Supplier Device Package	Package / Case	Serial Interfaces	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Number of Outputs	Output Configuration	Topology	Function	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices LTC3884ERHE#PBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-GQFN (5x6)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 ¯C
Analog Devices LTC3884IRHE-1#WTRPBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-GQFN (5x6)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 ¯C
Analog Devices LTC3884EUK#TRPBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-QFN (7x7)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 ¯C
Analog Devices LTC3884IRHE-1#WPBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-GQFN (5x6)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 ¯C
Analog Devices LTC3884IRHE#WPBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-GQFN (5x6)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 °C
Analog Devices LTC3884ERHE-1#TRPBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-GQFN (5x6)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 ¯C
Analog Devices LTC3884EUK#PBF	Surface Mount	1 MHz	200 kHz	Transistor Driver	Enable Frequency Control Phase Control Power Good	2	48-QFN (7x7)	48-WFQFN Exposed Pad	I2C PMBus	38 V	4.5 V	2	Positive	Buck	Step-Down	-40 °C	125 ¯C

Catalog

Dual Output PolyPhase Step-Down Controller with Sub-Milliohm DCR Sensing and Digital Power System Management

Key Features

• PMBus/I2C Compliant Serial InterfaceTelemetry Read-Back Includes VIN, IIN, VOUT, IOUT, Temperature and FaultsProgrammable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC

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

• Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC

• Sub-Milliohm DCR Current Sensing

• Digitally Adjustable Loop Compensation Parameters

• ±0.5% Output Voltage Accuracy Over Temperature

• Integrated Input Current Sense Amplifier

• Internal EEPROM with ECC and Fault Logging

• Integrated N-Channel MOSFET Gate Drivers (LTC3884)

• Wide VINRange: 4.5V to 38V

• VOUTRange: 0.5V to 3.5V (with Low DCR Setting); 0.5V to 5.5V (without Low DCR Setting)

• Accurate PolyPhase®Current Sharing for Up to 6 Phases

• AEC-Q100 Qualified for Automotive Applications

Description

The LTC3884/LTC3884-1 are dual output PolyPhase DC/DC synchronous step-down switching regulator controllers with an I2C-based PMBus compliant serial interface. The controllers employ a constant-frequency current mode architecture, together with a unique scheme to provide excellent performance for sub-milliohm DCR applications. The LTC3884/LTC3884-1 are supported by the LTpowerPlay®software development tool with graphical user interface (GUI).Programmable loop compensation allows the controller to be compensated digitally. Switching frequency, channel phasing, output voltage, and device address can be programmed 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 have independent power good indicators andFAULTfunction. The LTC3884 has integrated gate drivers.The LTC3884-1 has three-state PWM pins to drive power blocks or DrMOS power stages.APPLICATIONSTelecom, Datacom, and Storage SystemsIndustrial and Point-of-Load Applications