RT4720A

RT4720A Triple DC/DC Boost Converter for AMOLED General Description RT4720A is a triple channels DC/DC converter which is designed to provide the power of AMOLED. It integrates step up DC/DC and an inverting converter 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 RT4720A allows the use of low inductance inductor to save the board space. It provides dual positive output voltage, one is a fixed 5.8V or 7.7V output voltage by SEL pin and the other positive output is fixed 4.6V. For the negative output voltage, it can be programmed by external MCU through single wire (SWIRE pin). The output voltage range of negative output voltage is -1.4V to -5.4V. RT4720A has OTP, SCP, UVLO and over current protections. The RT4720A is available in a WQFN -16L 3x3 package to achieve saving PCB space. Features  Boost Converter to Supply Positive AVDD Voltage Fixed 5.8V or 7.7V  Boost Converter to Supply AMOLED Positive Voltage 4.6V  Inverter Converter to Supply AMOLED Negative Voltage From -1.4V to -5.4V  Maximum Output Current up to 300mA for AMOLED Positive & Negative Power Supply  Maximum Output Current up to 50mA for Fixed 5.8V or 7.7V AVDD Output Voltage  Typical Peak Efficiency : 90% (40mA to 150mA)  PWM Mode @ 1.5MHz Switching Frequency  High Output Voltage Accuracy  Excellent Line and Load Transient  Excellent Line and Load Regulation ...