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ISL6235 Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6235 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 14 page 1 TM FN9029 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2001, All Rights Reserved ISL6235 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 high- performance 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 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 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. Pinout ISL6235 (SSOP) TOP VIEW 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 Related Literature • Application Note AN9915 (IPM6220) Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. ISL6235CA -10 to 85 24 Ld SSOP M24.15 IPM6220EVAL1 Evaluation Board VBATT 3.3V ALWAYS BOOT2 UGATE2 VSEN2 SDWN2 PGOOD BOOT1 LGATE1 ISEN1 PHASE1 GND GATE3 SDWNALL UGATE1 24 23 22 21 20 19 18 17 16 15 14 13 1 2 3 4 5 6 7 8 9 10 11 12 PGND2 PHASE2 ISEN2 VSEN1 VSEN3 5V ALWAYS LGATE2 PGND1 SDWN1 Data Sheet June 2001 NOT REC OMM END ED F OR NEW DES IGN S REC OMM END ED R EPL ACE MEN T ISL6 232 (Ava ilabl e Fe b. 20 04) |
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