RT9212

Preliminary RT9212 Dual 5V Synchronous Buck PWM DC-DC and Linear Power Controller General Description The RT9212 is a 3-in-one power controller delivers high efficiency and tight regulation from two voltage regulating synchronous buck PWM DC-DC and one linear power controllers. The RT9212 can control two independent output voltages adjustment in range of 0.8V to 4.0V with 180 degrees channel to channel phase operation to reduce input ripple. In dual power supply application the RT9212 monitors the output voltage of both Channel 1 and Channel 2. An independent PGOOD (power good) signal is asserted for each channel after the soft-start sequence has completed, and the output voltage is within ±15% of the set point. The linear controller drives an external transistor to provide an adjustable output voltage. Built-in over-voltage protection prevents the output from going above 137.5% of the set point by holding the lower MOSFET on and the upper MOSFET off. Adjustable overcurrent protection (OCP) monitors the voltage drop across the RDS(ON) of the upper MOSFET for each synchronous buck PWM DC-DC controller individually. Ordering Information RT9212 Package Type C : TSSOP-24 Operating Temperature Range C : Commercial Standard P : Pb Free with Commercial Standard Note : RichTek Pb-free products are : −RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. −Suitable for use in SnPb or Pb-free soldering processes. −100% matte tin (Sn) plating. Features z...