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LTC3882
Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management
Overview
Features and Benefits
- PMBus/I2C Compliant Serial Interface
- 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
Product Details
The LTC3882 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 0.5V to 5.25V using a wide range of 3.3V compatible power stages, including power blocks, DrMOS or discrete FET drivers. Up to four LTC3882s can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation.
LTC3882 system configuration and monitoring is supported by the LTpowerPlay® software tool. The device’s serial interface can be used to read back input voltage, output voltage and current, temperature and fault status. A wide range of 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 programmed using external configuration resistors.
| PWM Enable Output | TG/BG Control | HW Write Protect | Dedicated PGOOD | Differential Vout Sense | |
| LTC3882 | Yes | Yes | Yes | No | VOUT0 Only |
| LTC3882-1 | No | No | No | Yes | VOUT0 & VOUT1 |
Applications
- High Current Distributed Power Systems
- Servers, Network and Storage Equipment
- Intelligent Energy Efficient Power Regulation
- Industrial/Telecom/ATE Systems
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (5)
Documentation
Reliability Data (1)
Application Notes (7)
Spec Notice (1)
Tools & Simulations
LTspice
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.
Models for the following parts are available in LTspice:
LTpowerCAD
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.
Design tools for the following parts are available in LTpowerCAD:
Linduino
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
Reference Designs (1)
Reference Materials
Product Selector Card (1)
Solutions Bulletins & Brochures (1)
A Guide to Ordering Custom Programmed Digital Power System Management Devices
LTC3882 Video Product Brief
Maximize Efficiency by Accurately Reducing Core Voltage of NXP μP
Press Releases (1)
Technical Articles (2)
Design Resources
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.
Support & Discussions
LTC3882 Discussions
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
