ISL6224 Data Sheet June 8, 2006 FN9042.8 Single Output Mobile-Friendly PWM Features Controller Adjustable output voltgage: 0.9-5.5V The ISL6224 provides power control and protection for a single, High efficiency over wide load range adjustable output voltage required to power chip-sets and - Higher efficiency in hysteretic mode at light load memory banks in high-performance notebooks and PDAs. This output voltage is adjustable in the range from 0.9-5.5V. Lossless current sense scheme - Uses MOSFETs r DS(ON) The hysteretic or PWM controller regulates the output - Optional current sense method higher precision voltage from battery voltages ranging from 4V to 24V. Synchronous rectification and hysteretic operation at light Supply operation mode loads contribute to a high efficiency over a wide range of range: 4V-24V - Wide V IN input voltages and loads. Efficiency is even further enhanced - Single 5V system rail by using MOSFETs r ) as a current sense component. DS(ON Input undervoltage lock-out on VCC pin (UVLO) Feed-forward ramp modulation, average current mode control and internal feed-back compensation provide fast Excellent dynamic response and firm handling of transients when powering advanced - Combined voltage feed-forward and current mode chip sets. control Two-stage conversion using system 5V voltage is possible at Power-good indicator a higher frequency (600kHz) to minimize the output filter size. 300/600kHz switching frequency The ISL6224 monitors the output voltage. A PGOOD (power Thermal shut-down good) signal is issued when soft-start is completed and the Pb-free plus anneal available (RoHS compliant) output is within 10% of the set point. A built-in overvoltage protection prevents output voltage Applications from going above 120% of the set point. Undervoltage Mobile PCs protection latches the chip off when the output drops below 70% of its setting value after soft-start sequence is Graphic cards completed. The PWM controllers overcurrent circuitry Hand-held portable instruments monitors the output current by sensing the voltage drop across the lower MOSFET. If higher precision sense Related Literature technique is required, an optional external current-sense Application Note AN9983 resistor may be used. Pinout Ordering Information ISL6224 (SSOP) TOP VIEW PART PART PKG. NUMBER MARKING TEMP. (C) PACKAGE DWG. VIN FCCM 1 16 ISL6224CA ISL6224CA -10 to 85 16 Ld SSOP M16.15A BOOT 2 15 PGOOD ISL6224CAZ 6224CAZ -10 to 85 16 Ld SSOP M16.15A 3 14 UGATE EN (Note 1) (Pb-free) 4 13 PHASE OCSET NOTES: 5 ISEN VOUT 12 1. Intersil Pb-free plus anneal products employ special Pb-free 6 11 VCC material sets molding compounds/die attach materials and VSEN 100% matte tin plate termination finish, which are RoHS LGATE SOFT 7 10 compliant and compatible with both SnPb and Pb-free soldering GND 8 9 PGND operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 2. Add -T for Tape and Reel. CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004, 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. NOT RECOMMENDED FOR NEW DESIGNS RECOMMENDED REPLACEMENT PART IS ISL6269ISL6224 Absolute Maximum Ratings Thermal Information Bias Voltage, V -0.3V to +7V Thermal Resistance (Typical, Note 1) (C/W) CC JA Input Voltage, Vin +27.0V SSOP Package 112 Phase and Isen Pins .GND -0.3V to +29.0V Maximum Junction Temperature (Plastic Package) 150C BOOT and Ugate Pins + 32.0V Maximum Storage Temperature Range .-65C to 150C BOOT with respect to PHASE + 7.0V Maximum Lead Temperature (Soldering 10s) . 300C All other pins GND -0.3V to 15V (SSOP - Lead Tips Only) ESD Classification . Class 2 Recommended Operating Conditions Bias Voltage, V . +5.0V 5% CC Input Voltage, Vin 4.0V to +24.0V Ambient Temperature Range -10C to 85C Junction Temperature Range .-10C to 125C CAUTION: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 3. is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. JA Electrical Specifications Operating Conditions: V = 5V, T = 10C to 85C, Unless Otherwise Noted. CC A PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS VCC SUPPLY Bias Current I LGATE, UGATE Open, VSEN forced above - 850 1300 A CC regulation point Shutdown Current I -5 15 A CCSN VCC UVLO Rising Vcc Threshold 4.3 - 4.75 V Falling Vcc Threshold 4.1 - 4.5 V Vcc UVLO Hysteris 0.1 - 0.5 V VIN Input Voltage Pin Current (Sink) I VIN pin connected to the input voltage source 10 20 30 A VIN Input Voltage Pin Current (Source) I VIN pin connected to ground -7 -15 -20 A VIN Shutdown Current I -- 1 A VIN OSCILLATOR PWM Oscillator Frequency F V = 3.5V - 24V 255 300 345 kHz c1 IN PWM Oscillator Frequency F V 0.5V 510 600 690 kHz c2 IN Ramp Amplitude, pk-pk V V = 16V, By Design - 2 - V R1 IN Ramp Amplitude, pk-pk V V 5V, By Design - 1.25 - V R2 IN Ramp Offset V -0.5 - V ROFF REFERENCE AND SOFT-START Internal Reference Voltage V -0.9 - V REF Reference Voltage Accuracy -1.0 - +1.0 % Soft-Start Current During Start-up I -5 - A SOFT Soft-Start Threshold V -1.5 - V SOFT PWM CONVERTER Load Regulation 0.0mA < I < 3.0A 5.0V < V < 24.0V -1.0 - +1.0 % VOUT1 IN VSEN pin bias current I -80 - nA VSEN FN9042.8 2 June 8, 2006