DESCRIPTION
The LX1677 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 (>35A) 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.

KEY FEATURES
◾ High Current Biphase Operation
◾ Outputs As Low As 0.800V
◾ † Biphase LoadSHARETM
◾ ‡ Transient Correction Loop™ Reduces Required Capacitance
◾ Differential Amplifier For Remote Voltage Sensing
◾ Integrated High Current MOSFET Drivers
◾ 200KHz to 1MHz Frequency Operation
◾ Programmable Slew Rate Control For Start-Up Sequence and VID change
◾ VID Changes On The Fly
◾ Power Good Indicator
◾ Short Circuit Protection
◾ Output Over Voltage and Under Voltage Protection
◾ No current-sense resistors

APPLICATIONS
◾ AMD Athlon 64™ and AMD Opteron™ Processors
◾ Processor Core Voltage Supply
◾ Voltage Regulator Modules