Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications

The ISL6235 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.

Features
• PWM Only Mode for Reduced Noise at Light Loads
• 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
• No Current-Sense Resistor Required
    - Uses MOSFET’s rDS(ON)
    - Optional Current-Sense Resistor for More Precision
• Operates Directly From Battery 5.6 to 24V 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

Applications
• Mobile PCs
• Hand-Held Portable Instruments
• LCD PCs
• Cable Modems
• DSL Modems
• Set Top Box