SS6341 Datasheet | Silicon Standard

High Performance, Triple-Output, Auto-Tracking bo Controller n l l l l l Features Provides Three Accurately Regulated Output Voltages Optimized Voltage-Mode PWM Control Dual N-Channel MOSFET Synchronous Drivers Fast Transient Response Adjustable Over-Current Protection Using External MOSFET RDS(ON) - No External Current Sense Resistors Required. Programmable Soft Start Function 200KHz Free-Running Oscillator Robust Output Auto-Tracking Characteristics Sink and Source Capabilities with External Circuit n GENERAL DESCRIPTION The SS6341 bines a synchronous voltage-mode PWM controller with two linear controllers, including the associated monitoring and protection functions. It is able to power CPUs, GPUs, memories, chipsets and multi-voltage applications. The PWM controller regulates the output voltage using a synchronous rectified step-down converter. The built-in N-Channel MOSFET drivers also help to simplify the design of the step-down converter. The PWM controller Features over-current protection using the RDS(ON) of the external MOSFET, improving efficiency and cost, as there is no expensive current sense resistor required. l l l l n l l l l l l l .Data Sheet.net/ APPLICATIONS Advanced PC motherboards Information PCs Servers and Workstations Internet Appliances LCD Monitor PC Add-On Cards DDR Termination Two built-in adjustable linear controllers drive external MOSFETs to form two linear regulators that regulate power for multiple system I/Os. The output voltage of both linear regulators can also be adjusted by means of an external resistor divider. Both linear regulators feature current-limiting. For system I/Os requiring current less than 500m A, the SS6340 is remended as it saves one external MOSFET. The programmable soft-start design provides a controlled output voltage rise, which limits the current during power-on. A shutdown function is also provided, for disabling the bo controller. Rev.2.01 6/26/2003 .Silicon...