Power Management Switching Regulator Step-Down (Buck) Regulators Poly-Phase Buck Controllers
Power Management Switching Regulator Step-Down (Buck) Regulators External Power Switch Buck Controllers
 Power Management System Supervisor, Monitor and Control Sequencers, Trackers, and Margining Controllers
 Power Management System Supervisor, Monitor and Control Power System Management

LTC2974 - 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement

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

Features

  • 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 5.5V
  • 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
Buy Now • Request Samples
* 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
Buy Now

Companion Boards

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

Applications

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

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Simulate

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. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

Related models available in LTspice IV
LTC3883-1
LTC3883

Technical Support