LTC3882-1 - Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Features

  • Order Custom Programmed Parts
  • 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 ≤ VOUT ≤ 5.25V
  • ±0.5% Output Voltage Error
  • Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz
  • Accurate PolyPhase® Current Sharing
  • Internal EEPROM with Fault Logging
  • 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

Typical Application

LTC3882-1 Typical Application
LTC3882-1 Typical Application
LTC3882-1 Typical Application

Description

The LTC®3882-1 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 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 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 Vout Sense
LTC3882 Yes Yes Yes No  VOUT0 Only
LTC3882-1  No No No Yes VOUT0 & VOUT1

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC3882EUJ-1#PBF 6x6 QFN-40 UJ E 05-08-1728 Yes
LTC3882EUJ-1#TRPBF 6x6 QFN-40 UJ E 05-08-1728 Yes
LTC3882IUJ-1#PBF 6x6 QFN-40 UJ I 05-08-1728 Yes
LTC3882IUJ-1#TRPBF 6x6 QFN-40 UJ I 05-08-1728 Yes


LTC3882-1 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3882EUJ-1#PBF 6x6 QFN-40 E $7.64 $5.35 Yes
LTC3882EUJ-1#TRPBF 6x6 QFN-40 E $5.41 Yes
LTC3882IUJ-1#PBF 6x6 QFN-40 I $8.86 $6.20 Yes
LTC3882IUJ-1#TRPBF 6x6 QFN-40 I $6.26 Yes
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* 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2252A-B LTC3882EUJ-1 Demo Board | Programming Clamshell Socketed Demo Board Contact Factory
DC2312A-A LTC3882EUJ-1 Demo Board | Dual Voltage Mode PMBus Buck, 7V ≤ VIN ≤ 14V; VOUT0/VOUT1 = 0.5V to 2V @ Up to 35A Contact Factory
DC2312A-B LTC3882EUJ-1 Demo Board | Voltage Mode PMBus Buck, 7V ≤ VIN ≤ 14V; 0.5V ≤ VOUT ≤ 2V @ Up to 70A Contact Factory
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Click here to view our complete list of demo boards

Applications

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

Product Notifications

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC3882

LTpowerCAD

The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:
LTC3882
LTC3882 Parallel

Technical Support