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ISL6558CBZ Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6558CBZ Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 16 page 1 ® FN9027.12 ISL6558 Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positioning The ISL6558 is a multi-phase PWM controller, which in combination with the HIP6601B, HIP6602B, HIP6603B, or ISL6605 companion gate drivers form a complete solution for high-current, high slew-rate applications. The ISL6558 regulates output voltage, balances load currents and provides protective functions for two to four synchronous rectified buck converter channels. A novel approach to current sensing is used to reduce overall solution cost and improve efficiency. The voltage developed across the lower MOSFET during conduction is sampled and fed back to the controller. This lossless current-sensing approach enables the controller to maintain phase-current balance between the power channels, provide overcurrent protection, and permit droop compensation. Optional output voltage “droop” or active voltage positioning is supported via the DROOP pin. Taking advantage of this feature reduces the size and cost of the output capacitors required to support a load transient. In the event of an overvoltage, the controller monitors and responds to reduce the risk of damage to load devices. Undervoltage conditions are indicated through a PGOOD transition. Overcurrent conditions cause the converter to shutdown limiting the exposure of load devices. These integrated monitoring and protection features provide a safe environment for microprocessors and other advanced low voltage circuits. Features • Pb-Free Plus Anneal Available (RoHS Compliant) • Multi-Phase Power Conversion - 2-, 3-, or 4-Phase Operation • Optional Output Voltage Droop • Precision Channel-Current Balance • Lossless Current Sensing • Precision Reference Voltage - 0.8V ± 1.5% Over -40°C - 85°C Range - 0 . 8 V ± 1.0% Over 0°C - 70°C Range • Fast Transient Response • Overcurrent and Overvoltage Protection • Digital Soft-start • Power Good Indication • High Ripple Frequency (80kHz to 1.5MHz) • QFN Package - Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline - Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile Applications • Power Supply Control for Microprocessors • Low Output Voltage, High Current DC-DC Converters • Voltage Regulator Modules • Servers and Workstations • Memory and Accelerated Graphics Port Supplies • Communication Processor and Personal Computer Peripherals Pinouts COMP DROOP FB VSEN PWM2 ISEN1 PWM1 ISEN2 N/C ISEN3 1 2 3 4 5 67 89 10 15 14 13 12 11 20 19 18 17 16 9 10 11 12 13 14 16 15 8 7 6 5 4 3 2 1 VCC PGOOD COMP DROOP FB VSEN GND FS/EN PWM4 ISEN1 PWM1 PWM2 ISEN4 ISEN2 ISEN3 PWM3 ISL6558 (16 LEAD SOIC) TOP VIEW ISL6558 (20 LEAD 5X5 QFN) TOP VIEW Data Sheet June 21, 2005 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2001-2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
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