IPM6220
Multi-Output System Electronics Regulator for Mobile PCs
Typical Diagram
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
Description
The IPM6220 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.
Applications
- Mobile PCs
- Hand-Held Portable Instruments
