Dual Output AMOLED Bias


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The RT4723 is a highly integrated Boost, LDO and inverting charge pump to generate positive and negative output voltage. The negative output voltages can be adjusted from -0.6V to -2.4V with 100mV steps by SWIRE interface protocol. The part maintains the highest efficiency by utilizing a -0.33x/-0.5x mode fractional charge pump with automatic mode transition. With its input voltage range of 2.5V to 4.6V, the RT4723 is optimized for products powered by single-cell battery and the output current up to 55mA. The RT4723 is available in WL-CSP-15B 1.39x2.07 (BSC) package to achieve optimized solution for PCB space.


Key Spec.
Status Active
Vin (min) (V) 2.5
Vin (max) (V) 4.6
Number of Channels 3
Number of Buck Converters 0
Number of Boost Converters 1
Number of Negative Outputs 1
Number of LED Drivers 0
Number of LDO Regulators 1
Application OLED for Watch
Features Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;SCP;UVP
Package Type WL-CSP1.39x2.07-15(BSC)
  • 2.5V to 4.6V Supply Voltage Range
  • Single Wire Protocol
  • Fixed 4.6V Positive Voltage Output
  • Negative Voltage Output from -0.6V to -2.4V per 0.1V by SWIRE Pin
  • Auto-Mode Transition of -0.33x/-0.5x Charge Pump
  • Built-in Soft-Start
  • 55mA Maximum Output Current
  • Programmable Output Fast Discharge Function
  • High Impedance Output when IC Shutdown
  • UVLO, OCP, SCP, OTP Protection
  • Shutdown Current < 1μA
  • Available in 15-Ball WL-CSP Package
TitleLast UpdateShareDownload
Dual Output AMOLED Bias2016/04/01
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