Overview

Features and Benefits

  • High Efficiency: Up to 95%
  • Up to 3A Continuous Output Current
  • 4-Phase Operation for Low Output Ripple and Tiny Solution Size
  • Output Disconnect and Inrush Current Limiting
  • Very Low Quiescent Current: 12µA
  • 0.5V to 4.5V Input Range
  • 2.4V to 5.25V Adjustable Output Voltage
  • Adjustable Current Limit
  • Adjustable, Fixed Frequency Operation from 100kHz to 2MHz per Phase
  • Synchronizable Oscillator with Sync Output
  • Internal Synchronous Rectifiers
  • Manual or Automatic Burst Mode® Operation
  • Power Good Comparator
  • <1µA Shutdown Current
  • Antiringing Control
  • 5mm x 5mm Thermally Enhanced QFN Package

Product Details

The LTC3425 is a synchronous, 4-phase boost converter with output disconnect capable of operation below 1V input. It includes four N-channel MOSFET switches and four P-channel synchronous rectifiers for an effective RDS(ON) of 0.045Ω and 0.05Ω, respectively. 4-phase operation greatly reduces peak inductor currents, and capacitor ripple current, and increases effective switching frequency, minimizing inductor and capacitor sizes. True output disconnect eliminates inrush current and allows zero load current in shutdown. External Schottky diodes are not required in most applications (VOUT < 4.3V). Power saving Burst Mode operation can be user controlled or left in automatic mode.

Other features include 1µA shutdown current, programmable frequency with sync in and out, programmable soft-start, antiringing control, thermal shutdown, adjustable current limit, reference output and power good comparator.

The LTC3425 is available in a small, thermally enhanced 32-pin QFN package.

Applications

  • Handheld Computers
  • Point-of-Load Regulators
  • 3.3V to 5V Conversion

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

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.

LTspice

Models for the following parts are available in LTspice:

LTC3425

Product Recommendations

LTC3425 Companion Parts

Recommended Suggested Oscillator

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.

Discussions

LTC3425 Discussions

LTC3425 Didn't find what you were looking for? Ask the Analog community »

Sample & Buy

Sample & Buy functionality exists in desktop site
Back
Check Inventory


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.


Price Table Help

 

Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.