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IR3521 Dataheets PDF



Part Number IR3521
Manufacturers International Rectifier
Logo International Rectifier
Description XPHASE3 AMD SVID CONTROLLER
Datasheet IR3521 DatasheetIR3521 Datasheet (PDF)

www.DataSheet4U.com IR3521 DATA SHEET XPHASE3TM AMD SVID CONTROL IC DESCRIPTION The IR3521 Control IC combined with an xPHASE3TM Phase IC provides a full featured and flexible way to implement a complete AMD SVID power solution. It provides outputs for both the VDD core and VDDNB auxiliary planes required by the CPU. The IR3521 provides overall system control and interfaces with any number of Phase ICs each driving and monitoring a single phase. The xPHASE3TM architecture results in a power sup.

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www.DataSheet4U.com IR3521 DATA SHEET XPHASE3TM AMD SVID CONTROL IC DESCRIPTION The IR3521 Control IC combined with an xPHASE3TM Phase IC provides a full featured and flexible way to implement a complete AMD SVID power solution. It provides outputs for both the VDD core and VDDNB auxiliary planes required by the CPU. The IR3521 provides overall system control and interfaces with any number of Phase ICs each driving and monitoring a single phase. The xPHASE3TM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. FEATURES                   2 converter outputs for the AMD processor VDD core and VDDNB auxiliary planes Supports High Speed (HS) I2C Serial communications PSI_L serial commands are communicated to a programmable number of phase ICs 0.5% overall system set point accuracy High speed error amplifiers with wide bandwidth of 20MHz and fast slew rate of 10V/us Remote sense amplifiers provide differential sensing and require less than 50uA bias current Programmable Dynamic VID Slew Rates Programmable VID Offset (VDD output only) Programmable output impedance (VDD output only) Programmable Dynamic OC for IDD_Spike Programmable per phase switching frequency of 250kHz to 1.5MHz Hiccup over current protection with delay during normal operation Central over voltage detection and communication to phase ICs through IIN (ISHARE) pin OVP disabled during dynamic VID down to prevent false triggering Over voltage signal to system with over voltage detection during powerup and normal operation Detection and protection of open remote sense lines Gate Drive and IC bias linear regulator control with programmable output voltage and UVLO Small thermally enhanced 32L MLPQ (5mm x 5mm) package ORDERING INFORMATION Device IR3521MTRPBF IR3521MPBF (Samples Only) Package 32 Lead MLPQ (5 x 5 mm body) 32 Lead MLPQ (5 x 5 mm body) Order Quantity 3000 per reel 100 piece strips Page 1 V3.03 www.DataSheet4U.com IR3521 APPLICATION CIRCUIT 12V Q3 CVCCL9 PHSIN 12V VCCL To Converters To Phase IC VCCL & GATE DRIVE BIAS Phase Clock Input to Last Phase IC of VDD 2 wire Digital Daisy Chain Bus to VDD & VDDNB Phase ICs Power Saving Indicator to VDD Phase ICs RVCCLFB1 RVCCLDRV RVCCLFB2 PGOOD 30 27 31 28 32 29 26 25 PHSOUT CLKOUT SVC VCCLDRV VCCLFB PGOOD VCCL SVC PHSIN PHSOUT CLKOUT EPAD SVD PWROK ENABLE CSS/DEL2 CVDAC2 RVDAC2 ROCSET2 1 2 3 4 5 6 7 8 SVD PWROK ENABLE IIN2 SS/DEL2 VDAC2 OCSET2 VOSNS2+ VOSNS1+ VONSN1VOSNS2EAOUT2 VOUT2 FB2 PSI_L ROSC 24 23 22 21 20 19 18 17 CSS/DEL1 RVDAC1 ROCSET1 CVDAC1 ROSC PSI_L IR3521 CONTROL IC VDRP1 IIN1 SS/DEL1 VDAC1 OCSET1 EAOUT1 VOUT1 FB1 ISHARE1 VDAC1 EAOUT1 CDRP1 RDRP1 3 Wire Analog Control Bus to VDD Phase ICs 9 10 11 12 13 14 15 16 RCP2 CCP21 RFB22 RFB21 CFB2 CFB1 RFB12 RCP1 CCP11 RTHERMISTOR1 CCP22 RFB11 CCP12 Load Line NTC Thermistor; Locate close to VDD Power Stage.


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