DESCRIPTION
The LX1671 is a highly integrated power supply controller IC featuring three PWM switching regulator stages with an additional onboard linear regulator driver.
Two of the constant frequency voltage-mode PWM phases can be easily configured for a single Bi-Phase high current output or two independently regulated outputs. Each phase incorporates a fully programmable soft-start sequence. This versatility yields either three or four independently regulated outputs with full power sequencing capability giving system designers the ultimate flexibility in power supply design.

KEY FEATURES
◾ Up to Four Independently Regulated Outputs
◾ Outputs As Low As 0.8V Generated From An Internal 1% Reference
◾ Multiphase High Current Output Reduces Required Capacitance
◾ Integrated High Current MOSFET Drivers
◾ 300kHz High Frequency Operation Minimizes External Component Requirements
◾ Independent Phase Programmable Soft-Start and Power Sequencing
◾ Adjustable Linear Regulator Driver Output
◾ No current-sense resistors
◾ DDR Termination Compliant

APPLICATIONS/BENEFITS
◾ Multi-Output Power Supplies
◾ Video Card Power Supplies
◾ PC Peripherals
◾ Portable PC Processor and I/O Supply