LTC4041
LTC4041
RECOMMENDED FOR NEW DESIGNS2.5A Supercapacitor Backup Power Manager
- Part Models
- 4
- 1ku List Price
- Starting From $4.42
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Overview
- 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
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 VIN 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
Documentation
Data Sheet 1
Technical Articles 2
Book & eBook 1
Brochure 1
Rarely Asked Question 1
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) | ||
| LTC4041EUFD#TRPBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4041IUFD#PBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4041IUFD#TRPBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC4041EUFD#PBF | PRODUCTION | |
| LTC4041EUFD#TRPBF | PRODUCTION | |
|
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper |
||
| LTC4041IUFD#PBF | PRODUCTION | |
| LTC4041IUFD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4041
Design Tool 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.
Evaluation Kits
LTC4041 Demo Board | 2.5A Supercapacitor Backup Power Manager