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ISL6553EVAL1 Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6553EVAL1 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 15 page 1 ® FN4931.1 ISL6553 Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller The ISL6553 multi-phase PWM control IC together with its companion gate drivers, the HIP6601, HIP6602 or HIP6603 provides a precision voltage regulation system for advanced microprocessors. Multi-phase power conversion is a marked departure from earlier single phase converter configurations previously employed to satisfy the ever increasing current demands of modern microprocessors. Multi-phase converters, by distributing the power and load current results in smaller and lower cost transistors with fewer input and output capacitors. These reductions accrue from the higher effective conversion frequency with higher frequency ripple current due to the phase interleaving process of this topology. For example, a two phase converter operating at 350kHz will have a ripple frequency of 700kHz. Moreover, greater converter bandwidth of this design results in faster response to load transients. Outstanding features of this controller IC include programmable VID codes from the microprocessor that range from 1.05V to 1.825V with a system accuracy of ±1%. Pull up currents on these VID pins eliminates the need for external pull up resistors. In addition “droop” compensation, used to reduce the overshoot or undershoot of the CORE voltage, is easily programmed with a single resistor. Another feature of this controller IC is the PGOOD monitor circuit which is held low until the CORE voltage increases, during its Soft-Start sequence, to within 10% of the programmed voltage. Over-voltage, 15% above programmed CORE voltage, results in the converter shutting down and turning the lower MOSFETs ON to clamp and protect the microprocessor. Under voltage is also detected and results in PGOOD low if the CORE voltage falls 10% below the programmed level. Over-current protection reduces the regulator RMS output current to 41% of the programmed over-current trip value. These features provide monitoring and protection for the microprocessor and power system. Features • Multi-Phase Power Conversion • Precision Channel Current Sharing - Loss Less Current Sampling - Uses rDS(ON) • Precision CORE Voltage Regulation - ±1% System Accuracy Over Temperature • Microprocessor Voltage Identification Input - 5-Bit VID Input - 1.05V to 1.825V in 25mV Steps - Programmable “Droop” Voltage • Fast Transient Recovery Time • Over Current Protection • High Ripple Frequency, (Channel Frequency) Times Number Channels . . . . . . . . . . . . . . . . . .100kHz to 3MHz • Pb-free available Related Literature • Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)” Ordering Information PART NUMBER TEMP. (oC) PACKAGE PKG. DWG. # ISL6553CB 0 to 70 16 Ld SOIC M16.15 ISL6553CBZ (Note) 0 to 70 16 Ld SOIC (Pb-free) M16.15 ISL6553EVAL1 Evaluation Platform *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 is 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-020B. Pinout ISL6553 (SOIC) TOP VIEW VID3 VID2 VID1 VID0 VID25mV FS/DIS VSEN PGOOD PWM1 PWM2 VCC FB ISEN1 COMP ISEN2 GND 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 Data Sheet August 2004 [ /Title (ISL65 53) /Subjec t (Micro process or CORE Voltag e Regula tor Multi- Phase Buck PWM Contro ller) /Autho r () /Keyw ords (Intersi l Corpor ation, semico nducto r, acpi, power manag ement, instantl y availab le, wired 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. 2000, 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners. |
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