LTC4041

RECOMMENDED FOR NEW DESIGNS

LTC4041

2.5A Supercapacitor Backup Power Manager

RECOMMENDED FOR NEW DESIGNS

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Part Models 4

1ku List Price Starting From $3.49

Features

2.5A Step-Down Supercapacitor Charger and 2.5A Step-Up Backup Supply
6.5A Switches for 2.5A Backup from One Supercapacitor or Two in Series
Input Current Limit Prioritizes Load over Charge Current
Input Disconnect Switch Isolates Input During Backup
Automatic Seamless Switch-Over to Backup Mode

Internal Supercapacitor Balancer (No External Resistors)
Programmable Charge Current and Charge Voltage
Input Power Fail Indicator
System Power Good Indicator
Optional OVP Circuitry Protects Device to >60V
Constant Frequency Operation
Thermally Enhanced 24-Lead 4mm × 5mm QFN Package

Additional Details

The LTC4041 is a complete supercapacitor backup system for 2.9V to 5.5V supply rails. It contains a high current step-down DC/DC converter to charge a single supercapacitor or two supercapacitors in series. When input power is unavailable, the step-down regulator operates in reverse as a step-up regulator to backup the system output from the supercapacitor(s).

The LTC4041’s adjustable input current limit function reduces charge current to protect the input supply from overload while an external disconnect switch isolates the input supply during backup. When the input supply drops below the adjustable PFI threshold, the 2.5A boost regulator delivers power from the supercapacitor to the system output.

An optional input overvoltage protection (OVP) circuit protects the LTC4041 from high voltage damage at the V_IN pin. An internal supercapacitor balancing circuit maintains equal voltages across each supercapacitor and limits the maximum voltage of each supercapacitor to a pre-determined value. The LTC4041 is available in a low profile (0.75mm) 24-Lead 4mm × 5mm QFN package.

Applications

Ride-Through “Dying Gasp” Supplies
High Current Ride-Through 3V to 5V UPS
Power Meters/Industrial Alarms
Servers/Solid State Drives

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $3.49

Technical Documents 4

LTC4041: 2.5A Supercapacitor Backup Power Manager Data Sheet (Rev.0) 07/03/2018

R457 Reliability Data 03/26/2018

Got Backup? Maintain Power Continuity 09/01/2018

What’s in Your Healthcare Monitor? 04/01/2020

Reference Materials 3

Enhance Sustainable Logistics with Automatic Data Capture 11/13/2022

Power You Can Trust: Achieving Efficient Battery-Powered Solutions 11/07/2023

Energy Storage Using Supercapacitors: How Big Is Big Enough? 07/01/2020

Design Resources 4

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4041EUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4041EUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4041IUFD#PBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4041IUFD#TRPBF	24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC4041EUFD#PBF
Pin/Package Drawing
24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4041EUFD#TRPBF
Pin/Package Drawing
24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4041IUFD#PBF
Pin/Package Drawing
24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4041IUFD#TRPBF
Pin/Package Drawing
24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

DC2642A

LTC4041 Demo Board | 2.5A Supercapacitor Backup Power Manager

LTC4041 Demo Board | 2.5A Supercapacitor Backup Power Manager

Download

DC2642A

LTC4041 Demo Board | 2.5A Supercapacitor Backup Power Manager

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Product Detail

Demonstration circuit 2642A shows the LTC4041 supercapacitor backup power manager operating with either a stack of two series supercapacitors (DC2642A-A) or a single supercapacitor (DC2642A-B). The board demonstrates the design of a 5V rail with a short-term power backup using 10F supercapacitors.

The input current limit, charge current limit, charge voltage, power fail threshold, and boost voltage are all configurable through changing resistor values on the board. Test points for all monitoring pins and LED indicators on status pins are also available to assist in the evaluation.

Resources

ZIP

DC2642A-B - Design Files

3.49 M

ZIP

DC2642A-A - Design Files

3.49 M

PDF

DC2642A-A - Schematic

85.04 K

PDF

DC2642A-B - Schematic

85.05 K

PDF

DC2642A - Demo Board Manual (Rev.0)

1.03 M

DC2642A

LTC4041 Demo Board | 2.5A Supercapacitor Backup Power Manager

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, 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.