The RT4706 is a triple channels DC-DC converter which is designed to provide the power of AMOLED. It integrates step up and inverting DC-DC converters to provide the positive and negative output voltage required by AMOLED.

For the portable application, board space and efficiency are always major concerns. The high switching frequency of the RT4706 allows the use of low inductance inductor to save the board space. VO1, VO2 and VO3 output voltage can be programmed by external MCU through CTRL pin. The positive output voltage range of VO1 is 4.6V to 5.0V and VO3 is 5.5V to 7.9V. The negative VO2 voltage range is -0.8V to -6V. The RT4706 is available in a WL-CSP-36B 2.469x2.469 (BSC) package to achieve optimized solution for PCB space.


  • AMOLED Panel
  • Mobile Phone
  • Portable Instrument
Status Active
Vin (min) (V) 2.5
Vin (max) (V) 5
Features Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type WL-CSP2.469x2.469-36(BSC)
  • 2.5V to 4.8V Supply Voltage Range
  • Boost Converter to Supply Positive VO1 (ELVDD) Voltage from 4.6V to 5.0V
  • Inverting Converter to Supply Negative VO2 (ELVSS) Voltage from -0.8V to -6.0V
  • Boost Converter to Supply Positive VO3 (AVDD) Voltage from 5.5V to 7.9V
  • Maximum Output Current up to 700mA for AMOLED Positive & Negative Power Supply
  • Maximum Output Current up to 150mA for AVDD Output Supply
  • PWM Mode @1.45MHz Switching Frequency
  • High Output Voltage Accuracy
  • Excellent Line and Load Transient
  • Excellent Line and Load Regulation
  • Low Quiescent Current < 1μA in Shutdown Mode
  • UVLO, OCP, SCP, OTP Protection
  • 36-Ball WL-CSP Package