ISL6522BCBZ Renesas

ISL6522B Data Sheet April 4, 2005 FN9150.1 Buck and Synchronous Rectifier Features Pulse-Width Modulator (PWM) Controller Drives two N-Channel MOSFETs The ISL6522B provides complete control and protection for a Operates from +5V or +12V input DC-DC converter optimized for high-performance Simple single-loop control design microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. - Voltage-mode PWM control The ISL6522B integrates all of the control, output adjustment, Fast transient response monitoring and protection functions into a single package. - High-bandwidth error amplifier The output voltage of the converter can be precisely - Full 0100% duty ratio regulated to as low as 0.8V, with a maximum tolerance of Excellent output voltage regulation 1% over temperature and line voltage variations. - 0.8V internal reference The ISL6522B provides simple, single feedback loop, voltage- - 1% over line voltage and temperature mode control with fast transient response. It includes a 200kHz Overcurrent fault monitor free-running triangle-wave oscillator that is adjustable from - Does not require extra current sensing element below 50kHz to over 1MHz. The error amplifier features a - Uses MOSFETs r DS(ON) 15MHz gain-bandwidth product and 6V/s slew rate which enables high converter bandwidth for fast transient perform- Converter can source and sink current ance. The resulting PWM duty ratio ranges from 0-100%. Pre-Biased Load Start Up Small converter size The ISL6522B protects against overcurrent conditions by - Constant frequency operation inhibiting PWM operation. The ISL6522B monitors the current by using the r of the upper MOSFET which - 200kHz free-running oscillator programmable from DS(ON) 50kHz to over 1MHz eliminates the need for a current sensing resistor. 14-lead SOIC package and 16-lead 5x5mm QFN Package Pinouts ISL6522B (SOIC) TOP VIEW QFN Package - Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat 14 RT 1 VCC No Leads-Product Outline 13 PVCC OCSET 2 - Near Chip-Scale Package Footprint Improves PCB SS 12 3 LGATE Efficiency and Thinner in Profile COMP 11 4 PGND Pb-Free Available (RoHS Compliant) FB 10 5 BOOT EN 9 Applications 6 UGATE GND 8 7 PHASE Power supply for Pentium , Pentium Pro, PowerPC and AlphaPC microprocessors ISL6522B (QFN) FPGA Core DC/DC Converters TOP VIEW Low-voltage distributed power supplies 16 15 14 13 SS 1 12 PVCC COMP 2 11 LGATE FB 3 10 PGND EN 4 9 BOOT 576 8 CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 321-724-7143 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004, 2005. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. PowerPC is a trademark of IBM. AlphaPC is a trademark of Digital Equipment Corporation. Pentium is a registered trademark of Intel Corporation. NC NC OCSET GND RT PAHSE VCC UGATEISL6522B Ordering Information TEMP. PKG. PART NUMBER RANGE (C) PACKAGE DWG. ISL6522BCB* 0 to 70 14 Ld SOIC M14.15 ISL6522BCBZ* 0 to 70 14 Ld SOIC M14.15 (See Note) (Pb-free) ISL6522BCR* 0 to 70 16 Ld 5x5 QFN L16.5x5B ISL6522BCRZ* 0 to 70 16 Ld 5x5 QFN L16.5x5B (See Note) (Pb-free) ISL6522BIB* -40 to 85 14 Ld SOIC M14.15 ISL6522BIBZ* -40 to 85 14 Ld SOIC M14.15 (See Note) (Pb-free) ISL6522BIR* -40 to 85 16 Ld 5x5 QFN L16.5x5B ISL6522BIRZ* -40 to 85 16 Ld 5x5 QFN L16.5x5B (See Note) (Pb-free) *Add -T suffix for tape and reel. NOTE: 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