Alternative Parts

  • LTC3350
    LTC3350

    High Current Supercapacitor Backup Controller and System Monitor

Overview

Features and Benefits

  • VIN Voltage Range: 3V to 20V
  • VOUT Voltage Range: 2.7V to 5V
  • 1A Current Mode Buck Main Regulator
  • 5A Boost Backup Regulator Powered from Single Supercapacitor
  • Boost Regulator Operates Down to 0.5V for Maximum Utilization of Supercapacitor Energy
  • Programmable Supercapacitor Charge Current to 1A with Overvoltage Protection
  • Charger Supports Single Cell CC/CV Battery Charging
  • Programmable VIN Current Limit
  • Programmable Boost Current Limit
  • VIN Power Fail Indicator
  • VCAP Power Good Indicator
  • VOUT Power On Reset Output
  • Compact 20-Lead 4mm × 4mm QFN Package

Product Details

The LTC3355 is a complete input power interrupt ride-through DC/DC system. The part charges a supercapacitor while delivering load current to VOUT, and uses energy from the supercapacitor to provide continuous VOUT backup power when VIN power is lost. The LTC3355 contains a nonsynchronous constant frequency current mode monolithic 1A buck switching regulator to provide a 2.7V to 5V regulated output voltage from an input supply of up to 20V.

A 1A programmable CC/CV linear charger charges the supercapacitor from VOUT. When the VIN supply drops below the PFI threshold, the devices’s constant frequency nonsynchronous current mode 5A boost switching regulator delivers power from the supercapacitor to VOUT. A thermal regulation loop maximizes charge current while limiting the die temperature to 110°C. The IC has boost, charger and VIN programmable current limits. The LTC3355 is available in a 20-lead 4mm × 4mm QFN surface mount package.

Applications

  • Ride-Through “Dying Gasp” Supplies
  • Power Meters/Industrial Alarms/Solid State Drives

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 (1)

Tools & Simulations

LTspice

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LTspice

Models for the following parts are available in LTspice:

LTC3355

Product Recommendations

LTC3355 Companion Parts

Recommended Related Parts

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.

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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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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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.