SS6532 Datasheet, PDF (1/9 Pages) Silicon Standard Corp. – 500mA Dual Linear Regulator with VAUX Driver

SS6532
500mA Dual Linear Regulator with V_AUX Driver
FEATURES
Continuous 3.3V output from three inputs
Complete power management solution
VCC, VSBY regulator supplies 500mA output
Built-in hysteresis when selecting input supplies
Drive control signal for external VAUX switch
Output can be forced higher than input (off-state)
APPLICATIONS
Desktop Computers
PCI Adapter Cards with Wake-on-LAN
Network Interface Cards (NICs)
Multi-power Systems
Systems with Standby Capabilities
DESCRIPTION
The SS6532 is a dual-input regulator with VAUX
drive control capable of delivering 3.3V/500mA
continuously. The output power is provided from
three independent input voltage sources on a
prioritized basis. Power is always taken in priority
using the following order: VCC, VSBY, and VAUX.
The SS6532 meets Intel's "Instantly Available"
power requirements which follow the ACPI
"Advanced Configuration and Power Interface"
standards.
When either VCC or VSBY is present, the device
automatically enables the regulator and produces
a stable 3.3V output. When only VAUX (3.3V) is
present, the drive control output will turn on an
external P-MOSFET switch from an auxiliary
3.3V supply VAUX to maintain VOUT.
The IC also prevents excessive current from
flowing back from VOUT to either input or ground
when the output voltage is greater than the input
voltage.
All the control circuitry needed to provide a
a smooth and automatic transition between all
three supplies has been incorporated. This allows
both VCC and VSBY to be dynamically switched
without loss of output voltage.
Rev.2.02 3/21/2004
www.SiliconStandard.com
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