LX1676 MOBILE AMD ATHLON™ VRM CONTROLLER New Product Information and Sales Kit Manufactured by: Microsemi-Integrated Products Group Garden Grove Calif Telephone: 714-898-8121 More than solutions – enabling possibilities Athlon is a registered trademark of AMD LX1676 Mobile AMD Athlon™ VRM Controller INTRODUCTION WWW . Microsemi .C OM CONFIDENTIAL INFORMATION This new product introduction guide is intended for use only by Microsemi’s sales people and authorized representatives and distributors. This material can be adapted for customer presentations, but the sales strategy and summary [pricing, availability, etc.] is confidential and should not be shown to customers DESCRIPTION † Patent numbers US6292378,US6285571,US6356063 Copyright © 2001 Rev. 1.0 1/27/03 Page 2 New Product Information and Sales Kit SALES KIT The LX1676 is a highly integrated VRM power supply controller IC featuring two PWM switching regulator stages. The two constant frequency voltage-mode PWM phases are configured as a single biphase high current output core supply. In biphase operation, the high current (>25A) output is generated by a LoadSHARETM† technique that balances the currents in the two phases. Power loss and noise, due to the ESR of the input capacitors, are minimized by operating the PWMs 180° out of phase. A synchronized Transient Correction Loop† provides exceptional control of the output droop and overshoot during very high di/dt load changes, the circuit can be configured for droop only, overshoot only or both. This architecture also minimizes capacitor requirements while maximizing regulator response. A true differential input amplifier is used for remote voltage sensing at the processor core. A VID code generator provides an internal reference that will set the output voltage. This VID code can be changed during operation and the reference will slew the output voltage to its new setting at a preset rate. During VID changes on the fly the Power Good indication will stay valid. Current through the lower phase 1 MOSFET will be sampled using its RDS(ON) for current limit and shut down. For further protection, an over voltage circuit will trip at a specified setting and clamp the output by turning off the upper MOSFETs and turning on the lower MOSFETs. The upper MOSFET drivers will use a bootstrap capacitor to provide the upper drive voltage over the input voltage range of 6 to 32 volts LX1676 Mobile AMD Athlon™ VRM Controller KEY PRODUCT INFORMATION T r a n s ie n t C o r r e c tio n L o o p V in + 5 V V in 6 to 3 2 V 70nH 5 B it V ID LX1676 V in 6 to 3 2 V Vout WWW . Microsemi .C OM SYSTEM BLOCK DIAGRAM KEY FEATURES Designed to meet the AMD specification for Mobile Athlon Processors High Current Bi-Phase Operation Outputs from 0.975 to 2.000 Volts LoadSHARE Transient Correction Loop Differential Sense Amplifier Integrated High Current High Voltage FET Gate Drivers 200KHz to 1MHz PWM Operation Programmable Soft Start Slew Rate VID Changes On the Fly SALES KIT Power Good Output Short Circuit Protection Over and Under Voltage Protection Voltage Mode—No Current Sense Resistors Copyright © 2001 Rev. 1.0 1/27/03 Page 3 New Product Information and Sales Kit LX1676 Mobile AMD Athlon™ VRM Controller APPLICATIONS Any power supply with outputs in the 0.925 to 2.000 volt range with high transient loads High Voltage Inputs up to 36 Volts WWW . Microsemi .C OM Core Power for AMD Mobil Athlon Processors (K7) SALES KIT Copyright © 2001 Rev. 1.0 1/27/03 Page 4 New Product Information and Sales Kit LX1676 Mobile AMD Athlon™ VRM Controller COMPETITIVE ANALYSIS A number of other controllers, such as the MAX1717, offer a solution without the transient correction loop and require a number of high cost output capacitors. Although these other controllers can work we offer a more robust solution at a lower total BOM cost. WWW . Microsemi .C OM There is no direct competition to this part. We have a unique topology that offers performance / price advantages over other solutions. Alternative Microsemi Solutions Device LX1677 Description VRM Controller Notes Similar but intended for K8 AMD Processors SALES KIT Copyright © 2001 Rev. 1.0 1/27/03 Page 5 New Product Information and Sales Kit LX1676 Mobile AMD Athlon™ VRM Controller SALES STRATEGY WWW . Microsemi .C OM Find Sockets AMD K7 Processors Supplies with Demanding Transient loads or High Input Voltages Positioning Emphasize total solution cost not IC cost. Key Facts to Remember • Unique Patented Topology • Lower total BOM Cost • Differential Sense Amplifier • Integrated High Current High Voltage FET Drivers • No Current Sense Resistors • The Transient correction loop corrects for positive and negative transients SALES KIT Copyright © 2001 Rev. 1.0 1/27/03 Page 6 New Product Information and Sales Kit LX1676 Mobile AMD Athlon™ VRM Controller SUMMARY Device LX1676-CLQ LX1676-CPW Package DC MLPQ TSSOP Commercial (0 to 70°C) 1000+ $2.37 $3.25 $2.90 $3.75 Note: WWW . Microsemi .C OM Pricing Availability Samples: Production: Now Now Options Packages: Temperature: 38 Pin MLPQ 0 to 70 Deg C 38 Pin TSSOP Technical Support Datasheet: See Microsemi Website Application Note: Evaluation Board: See Data Sheet LX1676 EVAL-XXX (Several Configurations Available) Factory Contacts Marketing Director: Alan Rohrabacher 714-372-8416 [email protected] Paul Pickle 714-372-8365 [email protected] Copyright © 2001 Rev. 1.0 1/27/03 SALES KIT Technical Questions: Page 7 New Product Information and Sales Kit