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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 synchronous-rectified 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 r_DS(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.

Key Features

• Provides Five Regulated Voltages
  • +5V ALWAYS
  • +3.3V ALWAYS
  • +5V Main
  • +3.3V Main
  • +12V
• High Efficiency Over Wide Line and Load Range
  • Synchronous Buck Converters on Main Outputs
  • Hysteretic Operation at Light Load
• No Current-Sense Resistor Required
  • Uses MOSFET's rDS(ON)
  • Optional Current-Sense Resistor for More Precision
• Operates Directly From Battery 5.6 to 22V Input
• Input Undervoltage Lock-Out (UVLO)
• Excellent Dynamic Response
  • Voltage Feed-Forward and Current-Mode Control
• Monitors Output Voltages
• Synchronous Converters Operate Out of Phase
• Separate Shut-Down Pins for Advanced Configuration and Power Interface (ACPI) Compatibility
• 300kHz Fixed Switching Frequency on Main Outputs
• Thermal Shut-Down Protection
• Pb-free Available

Applications

• Mobile PCs
• Hand-Held Portable Instruments