LTC3625
LTC3625
RECOMMENDED FOR NEW DESIGNS1A High Efficiency 2-Cell Supercapacitor Charger with Automatic Cell Balancing
- Part Models
- 8
- 1ku List Price
- Starting From $4.57
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Overview
- High Efficiency Step-Up/Step-Down Charging of Two Series Supercapacitors
- Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging
- Programmable Charging Current Up to 500mA (Single Inductor), 1A (Dual Inductor)
- VIN = 2.7V to 5.5V
- Selectable 2.4V/2.65V Regulation per Cell (LTC3625)
- Selectable 2V/2.25V Regulation per Cell (LTC3625-1)
- Low No-Load Quiescent Current: 23μA
- IVOUT, IVIN < 1μA in Shutdown
- Low Profile 12-lead 3mm × 4mm DFN Package
The LTC3625/LTC3625-1 are programmable supercapacitor chargers designed to charge two supercapacitors in series to a fixed output voltage (4.8V/5.3V or 4V/4.5V selectable) from a 2.7V to 5.5V input supply. Automatic cell balancing prevents overvoltage damage to either supercapacitor while maximizing charge rate. No balancing resistors are required.
High efficiency, high charging current, low quiescent current and low minimum external parts count (one inductor, one bypass capacitor at VIN and one programming resistor) make the LTC3625/LTC3625-1 ideally suited for small form factor backup or high peak power systems.
Charging current/maximum input current level is programmed with an external resistor. When the input supply is removed and/or the EN pin is low, the LTC3625/LTC3625-1 automatically enter a low current state, drawing less than 1μA from the supercapacitors.
The LTC3625/LTC3625-1 are available in a compact 12‑lead 3mm × 4mm × 0.75mm DFN package.
Applications
- Servers, RAID Systems, Mass Storage, High Current Backup Supplies
- Solid State Hard Drives
- Wireless Power Meters
- High Peak Power Boosted Supplies
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 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 |
|---|---|---|---|
| LTC3625EDE#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625EDE#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625EDE-1#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625EDE-1#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625IDE#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625IDE#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625IDE-1#PBF | 12-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC3625IDE-1#TRPBF | 12-Lead DFN (4mm x 3mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 1 | ||
| LTC4425 | RECOMMENDED FOR NEW DESIGNS | Linear SuperCap Charger with Current-Limited Ideal Diode and V/I Monitor |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3625
- LTC3625-1
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
LTC3625-1EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 4.5V or 4.0V @ IOUT up to 1A
Resources
LTC3625-1EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 4.5V or 4.0V @ IOUT up to 1A
Resources
LTC3625EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 5.3V/4.8V @ IOUT up to 1A
Resources
LTC3625EDE Demo Board | VIN = 2.7V to 5.5V, VOUT = 5.3V/4.8V @ IOUT up to 1A