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NCP5220 Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP5220 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 18 page © Semiconductor Components Industries, LLC, 2004 November, 2004 − Rev. 4 1 Publication Order Number: NCP5220/D NCP5220 3−in−1 PWM Dual Buck and Linear Power Controller The NCP5220 3−in−1 PWM a Dual Buck and Linear Power Controller, is a complete power solution for MCH and DDR memory. This IC combines the efficiency of PWM controllers for the VDDQ supply and the MCH core supply voltage with the simplicity of linear regulator for the VTT termination voltage. This IC contains two synchronous PWM buck controller for driving four external N−Ch FETs to form the DDR memory supply voltage (VDDQ) and the MCH regulator. The DDR memory termination regulator (VTT) is designed to track at the half of reference voltage with sourcing and sinking current. Protective features include, soft−start circuitry, undervoltage monitoring of 5VDUAL, BOOT voltage and thermal shutdown. The device is housed in a thermal enhanced space−saving DFN−20 package. Features • Pb−Free Package is Available* • Incorporates Synchronous PWM Buck Controllers for VDDQ and VMCH • Integrated Power FETs with VTT Regulator Source/Sink up to 2.0 A • All External Power MOSFETs are N−Channel • Adjustable VDDQ and VMCH by External Dividers • VTT Tracks at Half the Reference Voltage • Fixed Switching Frequency of 250 kHz for VDDQ and VMCH • Doubled Switching Frequency of 500 kHz for VDDQ Controller in Standby Mode to Optimize Inductor Current Ripple and Efficiency • Soft−Start Protection for All Controllers • Undervoltage Monitor of Supply Voltages • Overcurrent Protections for DDQ and VTT Regulators • Fully Complies with ACPI Power Sequencing Specifications • Short Circuit Protection Prevents Damage to Power Supply Due to Reverse DIMM Insertion • Thermal Shutdown • 5x6 DFN−20 Package Typical Applications • DDR I and DDR II Memory and MCH Power Supply *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PIN CONNECTIONS Device Package Shipping† ORDERING INFORMATION NCP5220MNR2 DFN−20 2500 Tape & Reel NCP5220 = Specific Device Code A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week MARKING DIAGRAM COMP SS SW_DDQ FBDDQ PGND BOOT VTT 5VDUAL VDDQ AGND FBVTT SLP_S5 FB1P5 BG_DDQ TG_DDQ COMP_1P5 SLP_S3 TG_1P5 BG_1P5 GND_1P5 DFN−20 MN SUFFIX CASE 505AB 1 20 NCP5220 AWLYYWW 1 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. NOTE: Pin 21 is the thermal pad on the bottom of the device. NCP5220MNR2G DFN−20 (Pb−Free) 2500 Tape & Reel http://onsemi.com |
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