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ISL6235

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 R...

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SeekIC No. : 004380146 Detail

ISL6235: 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 L...

ISL6235 Data Sheet

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Part Number:
ISL6235
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/21

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Product Details

Description



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


Application

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


Pinout

Connection Diagram


Specifications

Input Voltage, VBATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +27.0V
Phase, ISEN and SDWNALL Pins. . . . . . . . ..... . .GND -0.3V to +27.0V
Boot and UGATE Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +33.0V
BOOT1, 2 with Respect to PHASE1, 2 . . . . . . . . . . . . . .. . . . . . +6.5V
All Other Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . +6.5V


Description

The ISL6235 provides a highly integrated power control and protection solution for five output voltages required in highperformance notebook PC applications. The IC integrates ISL6235 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 ISL6235 that regulate the system main 5V and 3.3V voltages are implemented with synchronousrectified buck converters. Synchronous rectification insures 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 feed-forward 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 ISL6235 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.




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