RN5T653 is a white LED charge pump, output enable / disable, LED current and LDO output voltage can be individually controlled through single wire serial pulse I / F.
The Ricoh RN5T653 is a CMOS process chip designed as a charge pump specifically for white LED applications. It features a constant frequency operation and includes two Low Drop Output (LDO) regulators, one of which can be configured to power up to four LEDs for backlighting.
| Current capability (LED) | Up to 80mA |
|---|---|
| Charge pump modes | 1x/1.5x switchable |
| LDO Output Current | Up to 150mA |
| Package Type | 20pin QFN package |
| Operating Temperature Range | -55 to +125 °C |
The device supports a current capability of up to 80mA.
Yes, it features a switchable mode between 1x and 1.5x charge pump ratios.
A ceramic type bypass capacitor must be used, not a tantalum type.