SS6341 Datasheet, PDF (1/14 Pages) Silicon Standard Corp. – High Performance, Triple-Output, Auto-Tracking Combo Controller

SS6341
High Performance, Triple-Output,
Auto-Tracking Combo Controller
n ^FEATURES
l Provides Three Accurately Regulated Output
Voltages
l Optimized Voltage-Mode PWM Control
l Dual N-Channel MOSFET Synchronous Drivers
l Fast Transient Response
l Adjustable Over-Current Protection Using External
MOSFET R_DS(ON) - No External Current Sense
Resistors Required.
l Programmable Soft Start Function
l 200KHz Free-Running Oscillator
l Robust Output Auto-Tracking Characteristics
l Sink and Source Capabilities with External Circuit
n ^{GENERAL DESCRIPTION}
The SS6341 combines 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 R_DS(ON) of the external MOSFET,
improving efficiency and cost, as there is no
expensive current sense resistor required.
n ^APPLICATIONS
l Advanced PC motherboards
l Information PCs
l Servers and Workstations
l Internet Appliances
l LCD Monitor
l PC Add-On Cards
l 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 500mA, the
SS6340 is recommended 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 combo controller.
Rev.2.01 6/26/2003
www.SiliconStandard.com
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