Products
LTC3225
PRODUCTION150mA Supercapacitor Charger
- Part Models
- 4
- 1ku List Price
- Starting From $3.06
Viewing:
Overview
- Low Noise Constant Frequency Charging of Two Series Supercapacitors
- Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging
- Programmable Charge Current (Up to 150mA)
- Selectable 2.4V or 2.65V Regulation per Cell (LTC3225)
- Selectable 2V or 2.25V Regulation per Cell (LTC3225-1)
- Automatic Recharge
- IVIN = 20μA in Standby Mode
- ICOUT < 1μA When Input Supply is Removed
- No Inductors
- Tiny Application Circuit (2mm × 3mm DFN Package, All Components <1mm High)
The LTC3225/LTC3225-1 are programmable supercapacitor chargers designed to charge two supercapacitors in series to a selectable fixed output voltage (4.8V/5.3V for the LTC3225 and 4V/4.5V for the LTC3225-1) from input supplies as low as 2.8V to 5.5V. Automatic cell balancing prevents overvoltage damage to either supercapacitor. No balancing resistors are required.
Low input noise, low quiescent current and low external parts count (one flying capacitor, one bypass capacitor at VIN and one programming resistor) make the LTC3225/LTC3225-1 ideally suited for small battery-powered applications.
Charge current level is programmed with an external resistor. When the input supply is removed, the LTC3225/LTC3225-1 automatically enter a low current state, drawing less than 1μA from the supercapacitors.
The LTC3225/LTC3225-1 are available in a 10-lead 2mm × 3mm DFN package.
Applications
- Current Limited Applications with High Peak Power Loads (LED Flash, PCMCIA Tx Bursts, HDD Bursts, GPRS/GSM Transmitter)
- Backup Supplies
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Technical Articles 1
3rd Party Solutions 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 |
|---|---|---|---|
| LTC3225EDDB#TRMPBF | 10-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC3225EDDB#TRPBF | 10-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC3225EDDB-1#TRMPBF | 10-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC3225EDDB-1#TRPBF | 10-Lead DFN (3mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Charge Pumps 1 | ||
| LTC3226 | RECOMMENDED FOR NEW DESIGNS | 2-Cell Supercapacitor Charger with Backup PowerPath Controller |
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| 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:
- LTC3225
- LTC3225-1
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
LTC3225EDDB Demo Board| 150mA Supercapacitor Charger