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ISL6224CAZA Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6224CAZA Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 13 page 1 ® ISL6224 Single Output Mobile-Friendly PWM Controller The ISL6224 provides power control and protection for a single, adjustable output voltage required to power chip-sets and memory banks in high-performance notebooks and PDAs. This output voltage is adjustable in the range from 0.9-5.5V. The hysteretic or PWM controller regulates the output voltage from battery voltages ranging from 4V to 24V. Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of input voltages and loads. Efficiency is even further enhanced by using MOSFET’s rDS(ON) as a current sense component. Feed-forward ramp modulation, average current mode control and internal feed-back compensation provide fast and firm handling of transients when powering advanced chip sets. Two-stage conversion using system 5V voltage is possible at a higher frequency (600kHz) to minimize the output filter size. The ISL6224 monitors the output voltage. A PGOOD (power good) signal is issued when soft-start is completed and the output is within ±10% of the set point. A built-in overvoltage protection prevents output voltage from going above 120% of the set point. Undervoltage protection latches the chip off when the output drops below 70% of its setting value after soft-start sequence is completed. The PWM controller’s overcurrent circuitry monitors the output current by sensing the voltage drop across the lower MOSFET. If higher precision sense technique is required, an optional external current-sense resistor may be used. Features • Adjustable output voltgage: 0.9-5.5V • High efficiency over wide load range - Higher efficiency in hysteretic mode at light load • Lossless current sense scheme - Uses MOSFET’s rDS(ON) - Optional current sense method higher precision • Supply operation mode - Wide VIN range: 4V-24V - Single 5V system rail • Input undervoltage lock-out on VCC pin(UVLO) • Excellent dynamic response - Combined voltage feed-forward and current mode control • Power-Good indicator • 300/600kHz switching frequency • Thermal shut-down • Pb-Free Available (RoHS Compliant) Applications • Mobile PCs • Graphic cards • Hand-held portable instruments Related Literature • Application Note AN9983 Pinout ISL6224 (SSOP) TOP VIEW Ordering Information PART NUMBER TEMP. (°C) PACKAGE PKG. DWG. # ISL6224CA -10 to 85 16 Ld SSOP M16.15A ISL6224CAZ (Note 1) -10 to 85 16 Ld SSOP (Pb-free) M16.15A ISL6224CAZA (Note 1) -10 to 85 16 Ld SSOP (Pb-free) M16.15A NOTE: 1. Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering 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. EN GND ISEN VCC VSEN LGATE PGND VIN BOOT UGATE PHASE PGOOD 14 13 12 11 10 9 1 2 3 4 5 6 7 8 SOFT OCSET 15 16 VOUT FCCM FN9042.7 Data Sheet December 28, 2004 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 registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
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