RICOH/Sub PMU & White LED Driver
| RN5T651 Series |
Charge-Pump for White LED and Power Supply |
|
| RN5T651 contains constant frequency charge pump to optimize for white LED application, step-down DC/DC converter and two low-noise LDOs. Output enable/disable, LEDs current setting and LDO output voltage setting are individually controllable through I2C. | |
| Feature |
|
| ● |
・Step-down DC/DC converter × 1 (ON/OFF programmable) ・LDO × 2 (ON/OFF programmable) ・Over current Protection (ALL Regulators) and thermal shutdown |
| ● |
・Current capability: All currents capability 450mA ・Flash at 300mA max. ・Four Main LEDs at 25mA max. ・Two Sub LEDs 25mA max. |
| ● I2C-Bus (Max 400kHz) |
・Address = 12h ・ON/OFF control ・Individual LEDs current value setting ・Individual LDOs voltage value setting |
| ● Others | ・Soft-start circuit ・Short-circuit circuit, open-circuit and Thermal Protection |
| ● Package | ・28pin Thin QFN package (Body size: 4 x 4 x 0.8mm) |
| ● Process | ・CMOS process |
| Applications | |
| ● Wireless Handset | |
| ● MP3 players, PDA | |
| ● Digital Still Cameras | |
| ● Portable GPS | |
| Data Sheet(PDF) | |
| RN5T651 Series | |