LTC3883/LTC3883-1- Single Phase Step-Down DC/DC Controller with Digital Power System Management

Features

  • Order Custom Programmed Parts
  • 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/OC and Frequency Synchronization (250kHz to 1MHz)
  • ±0.5% Output Voltage Accuracy over Temperature
  • Integrated 16-Bit ADC and 12-Bit DAC
  • Integrated High Side Current Sense Amplifier
  • Internal EEPROM and Fault Logging
  • Integrated N-Channel MOSFET Gate Drivers

Power Conversion

  • Wide VIN Range: 4.5V to 24V
  • VOUT Range: 0.5V to 5.4V
  • Analog Current Mode Control Loop
  • Accurate PolyPhase® Current Sharing for Up to 6 Phases
  • Auto Calibration of Inductor DCR
  • Available in a 32-Lead (5mm × 5mm) QFN Package

Typical Application

LTC3883 Typical Application
LTC3883 Typical Application

Description

The LTC®3883/LTC3883-1 are PolyPhase capable DC/DC synchronous step-down switching regulator controllers with a PMBus compliant serial interface. The controllers use a constant frequency, current mode architecture that is supported by the LTPowerPlay™ software development tool with graphical user interface (GUI).

Switching frequency, output voltage, and device address can be programmed using external configuration resistors. Additionally, parameters can be set via the digital interface or stored in on-chip EEPROM.

The LTC3883/LTC3883-1 can be configured for Burst Mode® operation, discontinuous (pulse-skipping) mode or continuous inductor current mode. The LTC3883 incorporates an internal 5V linear regulator while the LTC3883-1 uses an external 5V supply for minimum power loss.

The LTC3883/LTC3883-1 are available in a 32-lead 5mm × 5mm QFN package.

Packaging

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

QFN-32

LTC3883 Package Drawing
LTC3883 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3883EUH#PBF QFN 32 E $6.89 $4.82 View
LTC3883EUH#TRPBF QFN 32 E $4.88 View
LTC3883EUH-1#PBF QFN 32 E $6.89 $4.82 View
LTC3883EUH-1#TRPBF QFN 32 E $4.88 View
LTC3883IUH#PBF QFN 32 I $7.56 $5.29 View
LTC3883IUH#TRPBF QFN 32 I $5.35 View
LTC3883IUH-1#PBF QFN 32 I $7.56 $5.29 View
LTC3883IUH-1#TRPBF QFN 32 I $5.35 View
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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
DC1778A-A LTC3883EUH Demo Board | 6.5V ≤ VIN ≤ 24V; 0.5V ≤ VOUT ≤ 5V @ 20A, with RSENSE Current Sense. $175.00
DC1778A-B LTC3883EUH Demo Board | 6.5V ≤ VIN ≤ 24V; 0.5V ≤ VOUT ≤ 5V @ 20A, with DCR Current Sense. $175.00
DC2052A LTC3880EUJ/LTC3883EUH, 3-Phase Demo Board, Vin Range: 6.5V to 14V, Vout Range: 0.5V to 1.8V @ 60A, PMBus Controlled, works w/ DC1613 Dongle. $250.00
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Companion Boards

Part Number Description Price Documentation
DC1613A USB-to-PMBus Controller $50.00
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Click here to view our complete list of demo boards

Applications

  • High Current Distributed Power Systems
  • Telecom Systems
  • Intelligent Energy Efficient Power Regulation

Product Notifications

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Design Tools

LTpowerCAD

The LTpowerCAD II 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:
LTC3883

LTpowerPlay

LTpowerPlay is a powerful development environment supporting Linear Technology's Digital Power System Management (PSM) products, providing unprecedented diagnostic and debug features.

Click here to download LTpowerPlay

LTspiceIV

LTspice IV 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 IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTC3883
LTC3883-1

Technical Support