LTC3226
LTC3226
RECOMMENDED FOR NEW DESIGNS2-Cell Supercapacitor Charger with Backup PowerPath Controller
- Part Models
- 4
- 1ku List Price
- Starting From $4.06
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Overview
- 1x/2x Multimode Charge Pump Supercapacitor Charger
- Automatic Cell Balancing
- Ideal Diode Main PowerPath™ Controller (VIN to VOUT)
- Internal 2A LDO Backup Supply (CPO to VOUT)
- Automatic Main/Backup Switchover
- Input Voltage Range: 2.5V to 5.5V
- Programmable SCAP Charge Voltage
- Programmable Input Current Limit (315mA Max)
- No Load IVIN = 55μA (Typical)
- Low Profile, 16-Lead 3mm × 3mm QFN Package
The LTC3226 is a 2-cell series supercapacitor charger with a backup PowerPath controller. It includes a charge pump supercapacitor charger with programmable output voltage, a low dropout regulator, and a power-fail comparator for switching between normal and backup modes.
The constant input current supercapacitor charger is designed to charge two supercapacitors in series to a resistor-programmable output voltage from a 2.5V to 5.3V input supply. The charger input current limit is programmable by an external resistor at up to 315mA.
The internal backup LDO is powered from the supercapacitors and provides up to 2A peak output current with an adjustable output voltage. When the input supply falls below the power-fail threshold, the LTC3226 automatically enters a backup state in which the supercapacitors power the output through the LDO. The input supply power-fail voltage level is programmed by an external resistor divider.
Low input noise, low quiescent current and a compact footprint make the LTC3226 ideally suited for small, batterypowered applications. Internal current limit and thermal shutdown circuitry allow the device to survive a continuous short-circuit from the PROG or CPO pins to ground.
Applications
- Smart Power Meters
- Battery-Powered Industrial/Medical Equipment
- 3.3V Solid-State Drives
- Industrial Alarms
- Data Backup Supplies
- Battery Hold-Up 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 |
|---|---|---|---|
| LTC3226EUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3226EUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3226IUD#PBF | 16-Lead QFN (3mm x 3mm x 0.75mm w/ EP) | ||
| LTC3226IUD#TRPBF | 16-Lead QFN (3mm x 3mm x 0.75mm 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 | ||
| LTC3225 | PRODUCTION | 150mA Supercapacitor Charger |
| 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
Models for the following parts are available in LTspice:
- LTC3226
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
LTC3226EUD Demo Board | 2-Cell Supercap Charger with Backup PowerPath Controller