LTC3882-1
LTC3882-2

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. C) Product Selection Table

Part Models: 8
1ku List Price: Starting From $6.37

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Part Details

PMBus/I²C Compliant Serial Interface
- Monitor Voltage, Current, Temperature and Faults
- Program Voltage, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV/OC Limits
3V ≤ VINSNS ≤ 38V, 0.5V ≤ V_OUT ≤ 5.25V
±0.5% Output Voltage Error
Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz (2.5MHz-2)

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
Optional Resistor Programming for Key Parameters
40-Pin (6mm × 6mm) QFN Package
AEC-Q100 Qualified for Automotive Applications

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 Output	TG/BG Control	HW Write Protect	Dedicated PGOOD	Differential V_OUT Sense	Max PWM Frequency
LTC3882	Yes	Yes	Yes	No	V_OUT0 Only	1.25MHz
LTC3882-1	No	No	No	Yes	V_OUT0& V_OUT1	1.25MHz
LTC3882-2	No	No	No	Yes	V_OUT0& V_OUT1	2.5MHz

APPLICATIONS

High Current Distributed Power Systems
Servers, Network and Storage Equipment
Intelligent Energy Efficient Power Regulation

Part Models: 8
1ku List Price: Starting From $6.37

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3882EUJ-1#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882EUJ-1#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882EUJ-1#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882EUJ-1#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882IUJ-1#PBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882IUJ-1#TRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882IUJ-1#WPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3882IUJ-1#WTRPBF	40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2975	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement

Parts	Product Life Cycle	Description
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
LTC3882	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC3882
LTC3882-1

IBIS Model 1

LTC3882 IBIS Model

LTpowerPlay®

LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

Open Tool

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTC3882EUJ-1 Demo Board | Programming Clamshell Socketed Demo Board

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Product Details

Demonstration circuit 2252A-B is a lab tool to program and verify the EEPROM inside the LTC3882-1 IC. The DC2252A-B is shipped with a LTC3882-1 placed in the clamshell style programming socket. The EEPROM contains the factory default configuration. The LTpowerPlay^™ .proj file that corresponds to the factory default can be found in the GUI.

Resources

DC2252A - Design Files
2.00M

DC2252A - Schematic
51.00K

DC2252A-B - Demo Manual
1.00M

LTC3882EUJ-1 Demo Board | Voltage Mode PMBus Buck, 7V ≤ VIN ≤ 14V; 0.5V ≤ VOUT ≤ 2V @ Up to 70A

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Product Details

Demonstration circuit 2312A is a high current, high efficiency, dual phase synchronous buck converter featuring the LTC3882EUJ-1, a dual output voltage mode controller with the additional features of differential V_OUT sense and dedicated PGOOD output on both channels, compared to LTC3882. The LTC3882-1 has the PMBus interface and power system management functions.