SS6532
500mA Dual Linear Regulator with V
AUX
Driver
FEATURES
Continuous 3.3V output from three inputs
Complete power management solution
V
CC
, V
SBY
regulator supplies 500mA output
Built-in hysteresis when selecting input supplies
Drive control signal for external V
AUX
switch
Output can be forced higher than input (off-state)
DESCRIPTION
The SS6532 is a dual-input regulator with V
AUX
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: V
CC
, V
SBY
, and V
AUX
.
The SS6532 meets Intel's "Instantly Available"
APPLICATIONS
Desktop Computers
PCI Adapter Cards with Wake-on-LAN
Network Interface Cards (NICs)
Multi-power Systems
Systems with Standby Capabilities
power requirements which follow the ACPI
"Advanced Configuration and Power Interface"
standards.
When either V
CC
or V
SBY
is present, the device
automatically enables the regulator and produces
a stable 3.3V output. When only V
AUX
(3.3V) is
present, the drive control output will turn on an
external P-MOSFET switch from an auxiliary
3.3V supply V
AUX
to maintain V
OUT
.
The IC also prevents excessive current from
flowing back from V
OUT
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
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