IPM6220A

NS ES I G D W NT R NE D F O LA C E M E E D MEN ED REP b. 2004) COMData E R Sheet le Fe E ND NOT ECOMM (Availab R 232 I S L6 ® IPM6220A August 2004 FN9032.1 Advanced Triple PWM and Dual Linear Power Controller for Portable Applications The IPM6220A provides a highly integrated power control and protection solution for five output voltages required in highperformance notebook PC applications. The IC integrates three fixed frequency pulse-width-modulation (PWM) controllers and two linear regulators along with monitoring and protection circuitry into a single 24 lead SSOP package. The two PWM controllers that regulate the system main 5V and 3.3V voltages are implemented with synchronousrectified buck converters. Synchronous rectification and hysteretic operation at light loads contribute to high efficiency over a wide range of input voltage and load variation. Efficiency is further enhanced by using the lower MOSFET’s rDS(ON) as the current sense element. Input voltage feedforward ramp modulation, current-mode control, and internal feed-back compensation provide fast and stable handling of input voltage load transients encountered in advanced portable computer chip sets. The third PWM controller is a boost converter that regulates a resistor selectable output voltage of nominally 12V. Two internal linear regulators provide +5V ALWAYS and +3.3V ALWAYS low current outputs required by the notebook system controller. Features Provides Five Regulated Voltages - +5V ALWAYS - +3.3V...