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ISL6521IBZ Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6521IBZ Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 13 page 1 ® FN9148.2 ISL6521 PWM Buck DC-DC and Triple Linear Power Controller The ISL6521 provides the power control and protection for four output voltages in low-voltage, high-performance applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions into a 16-lead SOIC package. The PWM controller is intended to regulate the low voltage supply that requires the greatest amount of current (usually the core voltage for the FPGA, ASIC, or processor) with a synchronous rectified buck converter. The linears are intended to regulate other system voltages, such as I/O (input/output) and memory circuits. Both the switching regulator and linear voltage reference provide ±2% of static regulation over line, load, and temperature ranges. All outputs are user-adjustable by means of an external resistor divider. All linear controllers can supply up to 120mA with no external pass devices. Employing bipolar NPNs for the pass transistors, the linear regulators can achieve output currents of 3A or higher with proper device selection. The ISL6521 monitors all the output voltages. The PWM controller’s adjustable overcurrent function monitors the output current by using the voltage drop across the upper MOSFET’s rDS(ON). The linear regulator outputs are monitored via the FB pins for undervoltage events. Features • Provides 4 Regulated Voltages - Switching Regulator 20A Capable - Three Linear Regulators - Capable of 120mA - Capable of up to 3A with an External Transistor • Externally Resistor-Adjustable Outputs • Simple Single-Loop Control Design - Voltage-Mode PWM Control • Fast PWM Converter Transient Response - High-Bandwidth Error Amplifier - Full 0% to 100% Duty Ratio • Excellent Output Voltage Regulation - All Outputs: ±2% Over Temperature • Overcurrent Fault Monitors - Switching Regulator Does Not Require Extra Current Sensing Element, Uses MOSFET’s rDS(ON) • Small Converter Size - 300kHz Constant Frequency Operation - Small External Component Count • Commercial and Industrial Temperature Range Support • Pb-free Available (RoHS Compliant) Applications • FPGA and PowerPC™-based boards • General purpose, low voltage power supplies Related Literature • Technical Support Document AG0001, “Power Management Application Guide for Xilinx FPGAs” • Technical Support Document AG0002, “Power Management Application Guide for Altera FPGAs” • Technical Support Document AG0005, “Power Management Application Guide for Actel FPGAs” Pinout ISL6521 (SOIC) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (°C) PACKAGE PKG. DWG. # ISL6521CBZ (Note) 0 to 70 16 Ld SOIC (Pb-free) M16.15 ISL6521CBZ-T (Note) 0 to 70 16 Ld SOIC (Pb-free) M16.15 ISL6521IBZ (Note) -40 to 85 16 Ld SOIC (Pb-free) M16.15 ISL6521IBZ-T (Note) -40 to 85 16 Ld SOIC (Pb-free) M16.15 ISL6521EVAL1 Evaluation Board 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-020C. DRIVE2 FB2 FB COMP FB3 OCSET DRIVE4 FB4 DRIVE3 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 UGATE GND LGATE PHASE BOOT VCC PGND Data Sheet February 8, 2005 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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