RICOH/Sub PMU & White LED Driver
| RN5T659 Series |
Charge pump for White LED |
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| RN5T659 contains a constant frequency charge pump, which is optimized for White LED application. Output enable/disable, LEDs current and LDOs ON/OFF are individually controllable through single wire serial pulse I/F. |
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| Feature |
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| ● |
・Current capability: Up to 115mA ・1x/1.33x/1.5x switchable charge pump mode ・Power up five LEDs for backlight: Up to 23mA/LED ・Luminance control with 32steps from 0.25mA to 23mA ・Soft-start |
| ● |
・LDO (150mA) × 2 (ON/OFF control through single wire serial pulse I/F) ・LDO output voltage is settable in 0.05V step in range of 1.2V to 3.3V ・Over current protection (All Regulators) and thermal shutdown |
| ● Others |
・UVLO ・Short-circuit protection |
| ● Package | ・20pin QFN package (Body size: 3.0 x 3.0 x 0.75mm, Pin pitch 0.4mm) |
| ● Process | ・CMOS process |
| Applications | |
| ● Wireless Handset | |
| ● MP3 players, PDA | |
| ● Digital Still Cameras | |
| ● Portable GPS | |
| Data Sheet(PDF) | |
| RN5T659 Series | |