DC1735A is a 2-cell supercap charger with a backup PowerPath controller, featuring the LTC3226. 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 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 resistor programma-ble power-fail threshold, the LTC3226 automatically enters a backup state in which the supercapacitors power the output through the LDO.
| Manufacturer | Analog Devices Inc. |
|---|---|
| Category | Power Management |
| Sub-Category | Capacitor Chargers |
| Eval Board Part Number | DC1735A-ND |
| Eval Board Supplier | Analog Devices Inc. |
| Eval Board |
Normally In Stock
|
| Capacitor Type |
Super Capacitor
|
| Function |
Charger Controller
|
| Number of Capacitors |
2
|
| Voltage In |
2.5 ~ 5.5 V
|
| Voltage Out (Max) |
5.5 V
|
| Charge Current (Max) |
2 A
|
| Topology |
Buck-Boost
|
| Features |
Adjustable Output Voltage
Automatic Cell Balancing Internal Backup LDO Power Fail Indicator Shutdown, Enable, Standby |
| Quiescent Current |
20 µA
|
| Component Count + Extras |
15 + 41
|
| Main I.C. Base Part |
LTC3226
|
| Design Author |
Linear Technology
|
| Date Created By Author | 2011-05 |
| Date Added To Library | 2019-06 |
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