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RT5035B Datasheet(PDF) 6 Page - Richtek Technology Corporation |
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RT5035B Datasheet(HTML) 6 Page - Richtek Technology Corporation |
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6 / 44 page  RT5035A/B Copyright © 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS5035A/B-02 February 2017 6 Operation The RT5035A/B is a highly integrated DSC power management IC that contains 7-CH switching DC-DC converters, two generic LDO, one Keep Alive low quiescent LDO, one load switch with soft-start control and current limit, one switch with reverse leakage prevention from backup battery, and a Real-Time Clock (RTC) that includes a time counter and a 32768Hz oscillator. CH1 : Step-Up DC-DC Converter CH1 is a step-up converter for motor driver power in DSC system. The converter operates at asynchronous PFM or fixed frequency PWM current mode which can be set by the I2C interface. CH2 : Synchronous Step-Up / Down DC-DC Converter CH2 is a synchronous step-up / down converter for system I/O power. The converter operates at fixed frequency PWM Current Mode. CH3 : Synchronous Step-Down DC-DC Converter CH3 is suitable for core power in DSC system. The converter operates in fixed frequency PWM mode with integrated internal MOSFETs, FB resistors and compensation network. The CH3 also can be adjusted output voltage if I2C is set to use the external resistor. CH4 : Synchronous Step-Down DC-DC Converter CH4 is suitable for memory power in DSC system. The converter operates in fixed frequency PWM mode with integrated internal MOSFETs, FB resistors and compensation network. CH5 : Synchronous Step-Down DC-DC Converter The converter operates in fixed frequency PWM mode with integrated internal MOSFETs, FB resistors and compensation network. The CH5 also can be adjusted output voltage if I2C is set to use the external resistor. CH6 : Generic LDO CH6 is a generic low voltage LDO for multiple purpose power. CH7 : WLED Driver CH7 is a WLED driver that can support 6WLED/30mA, and it can setting OVP threshold, dimming current level and power on/off by I2C interface. CH8 : Generic LDO CH8 is a generic low voltage LDO for multiple purpose power. CH9 : Keep Alive LDO and RTC The RT5035A/B provides a 3.1V output LDO for all IC control circuits and real time clock. VNEG Charge Pump The Charge pump is to increase the Vgs driving of big P-MOSFET in Ch2/3/4/5/10. When BAT < 3.6V and one of Ch2/3/4/5/10 turns on, VNEG charge pump will turn on and start to pump. Load Switch (SW4) The Load Switch is equipped with soft-start inrush control and current limit function (SW4). CH10 : Synchronous Step-Down DC-DC Converter CH10 is suitable for memory power in DSC system. The converter operates at asynchronous PFM or fixed frequency PWM current mode which can be set by the I2C interface and it integrated internal MOSFETs, FB resistors and compensation network. The CH10 also can be adjusted output voltage if I2C is set to use the external resistor. |
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