View sn608098 rt8206a datasheet:

RT8206A/B High-Efficiency, Main Power Supply Controllers for Notebook Computers General Description Features Wide Input Voltage Range 6V to 25V The RT8206A/B dual step-down, switch-mode power- Dual Fixed 5V/3.3V Outputs or Adjustable from 2V supply (SMPS) controller generates logic-supply voltages to 5.5V, 1.5% Accuracy in battery-powered systems. The RT8206A/B includes two Secondary Feedback Input Maintains Charge Pump pulse-width modulation (PWM) controllers fixed at 5V/ Voltage (RT8206A) 3.3V or adjustable from 2V to 5.5V. An optional external Independent Enable and Power Good charge pump can be monitored through SECFB 5V Fixed LDO Output : 70mA (RT8206A). This device also features a linear regulator