The RT9293 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 RSET. 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.


  • Cellular Phones
  • Digital Cameras
  • PDAs and Smart Phones and MP3 and OLED.
  • Portable Instruments
Key Spec.
RT9293A RT9293B
Recommended Alternative  RT4533/RT4533A RT4533/RT4533A
Vin (min) (V) 2.5 2.5
Vin (max) (V) 5.5 5.5
Vout (min) (V) 6 3
Vout (max) (V) 46 46
Output Adj. Method Resistor Resistor
Iq (typ) (mA) 0.4 0.4
SW Current Limit (typ) (A) 1.2 1.2
Freq (typ) (kHz) 1000 1000
Freq (min) (kHz) 750 750
Freq (max) (kHz) 1250 1250
Ron (typ) (Ohm) 0.7 0.7
Features Enable Input;Internal Compensation;OCP;OVP;Stable with Ceramic Capacitor;UVP Enable Input;Internal Compensation;OCP;OVP;Stable with Ceramic Capacitor;UVP
Package Type WDFN2x2-8;TSOT-26 WDFN2x2-8;TSOT-26
  • VIN Operating Range : 2.5V to 5.5V
  • Internal Power N-MOSFET Switch
  • Wide Range for PWM Dimming (100Hz to 200kHz)
  • 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
TitleLast UpdateDownload
Small Package, High Performance, Asynchronies Boost for 10 WLED Driver2008/05/13
Technical Documents
TitleItem TypeLast UpdateDownload
Designing Applications with Lithium-Ion Batteries App. Note2014/09/02
Additional Documents
Title Last Update ShareDownload
Power Management Components for Lithium-Ion Battery Powered Applications
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT9293BGQWWDFN2x2-82500 Request Buy from Distributor