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RT4731

Triple Output AMOLED Bias

RT4731
New

The RT4731 is a highly integrated Boost, two LDOs (one channel for AVDD and the other channel for VOP) 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 per step 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 2.9V to 4.8V, the RT4731 is optimized for products powered by single-cell battery and the output current up to 30mA. The RT4731 is available in UBGA-21B 1.82x3.23 package to achieve optimized solution for PCB space.

Applications

  • AMOLED Bias in Portable Device

Key Spec.

RT4731
Status EOL
Vin (min) (V) 2.9
Vin (max) (V) 4.8
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 UBGA1.82x3.23-21

Features

  • 2.9V to 4.8V Supply Voltage Range

  • Single Wire Protocol

  • Fixed 4.6V Positive Voltage Output

  • Positive Output Voltage AVDD 2.8V

  • 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

  • 30mA Maximum Output Current

  • Programmable Output Fast Discharge Function

  • High Impedance Output when IC Shutdown

  • UVLO, OCP, SCP, OTP Protection

  • Shutdown Current < 1μA

  • Available in 21-Ball UBGA Package

Contact us for more information