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ISL6525CB Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6525CB Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 11 page 1 ® FN4998.3 ISL6525 Buck and Synchronous-Rectifier Pulse-Width Modulator (PWM) Controller The ISL6525 provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N Channel MOSFETs in a synchronous-rectified buck topology. The ISL6525 integrates all of the control, output adjustment, monitoring and protection functions into a single package. A programmable delay time for the PGOOD signal makes it especially suitable for the VTT regulation in VRM8.5 applications. The output voltage of the converter can be precisely regulated to as low as 1.20V, with a maximum tolerance of ±1% over temperature and line voltage variations. The ISL6525 provides simple, single feedback loop, voltage- mode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from below 50kHz to over 1MHz. The error amplifier features a 15MHz gain-bandwidth product and 6V/ µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0% to 100%. The ISL6525 protects against over-current conditions by inhibiting PWM operation. The ISL6525 monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor. Features • Drives Two N-Channel MOSFETs • Operates From +5V or +12V Input • Simple Single-Loop Control Design - Voltage-Mode PWM Control • Fast Transient Response - High-Bandwidth Error Amplifier - Full 0% to 100% Duty Ratio • Excellent Output Voltage Regulation - 1.20V Internal Reference - ±1% Over Line Voltage and Temperature • Programmable delay for PGOOD signal • Over-Current Fault Monitor - Does Not Require Extra Current Sensing Element - Uses MOSFETs rDS(ON) • Small Converter Size - Constant Frequency Operation - 200kHz Free-Running Oscillator Programmable from 50kHz to Over 1MHz • 14 Pin, SOIC Package • Pb-Free Available (RoHS Compliant) Applications • Power Supply for Various Microprocessors • VTT Regulation for VRM8.5 • High-Power 5V to 3.xV DC-DC Regulators • Low-Voltage Distributed Power Supplies Pinout ISL6525 (SOIC) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. DWG. # ISL6525CB 0 to 70 14 Ld SOIC M14.15 ISL6525CBZ (See Note) 0 to 70 14 Ld SOIC (Pb-free) M14.15 *Add “-T” suffix to part number for tape and reel packaging. 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. 8 9 10 11 12 13 14 7 6 5 4 3 2 1 OCSET SS GND COMP FB DELAY LGATE PGND BOOT UGATE PHASE VCC PGOOD RT Data Sheet December 27, 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. 2001, 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
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