The RT9293B is a high frequency, asynchronous boost converter. The internal MOSFET can support up to 10 White LEDs for backlighting and OLED power application, and the internal soft start function can reduce the inrush current. The device operates with 1-MHz fixed switching frequency to allow small external components and to simplify possible EMI problems. For the protection, the RT9293A provides 50V OVP and the RT9293B provides 50V/20V OVP to allow inexpensive and small-output capacitors with lower voltage ratings. The LED current is initially set with the external sense resistor R_SET. The RT9293 is available in the tiny package type TSOT-23-6 and WDFN-8L 2x2 packages to provide the best solution for PCB space saving and total BOM cost.

Note :
Richtek Green products are :
► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
► Suitable for use in SnPb or Pb-free soldering processes.

• VIN Operating Range : 2.5V to 5.5V
• Internal Power N-MOSFET Switch
• Wide Range for PWM Dimming (100Hz to200kHz)
• Minimize the External Component Counts
• Internal Soft Start
• Internal Compensation
• Under Voltage Protection
• Over Voltage Protection
• Over Temperature Protection
• Small TSOT-23-6 and 8-Lead WDFN Packages
• RoHS Compliant and Halogen Free

• Cellular Phones
• Digital Cameras
• PDAs and Smart Phones and MP3 and OLED.
• Portable Instruments

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TSOT-23-6

WDFN-8L 2x2