Technical Reference Note (APC08)
Basic Operation and Features
The APC08 family was designed specifically to address applications where on board distributed power with Point-of-Load
Converters (Conversion needed as close to the IC, usually DSP’s and ASIC’s) is employed. With its wide range input and
flexible programmable output, any change in the load becomes very manageable with little to no impact on time to market. All
of the converters in this family are buck converters. The APC08x03 versions allow 1.8V to 6V input voltage and the
APC08x08 versions allow a 5V to 12V input with 14V max surge.
MODULE PIN ASSIGNMENT
There are 4 to 7 surface mount pins on a Centauri module. The availability of pins from individual modules is relevant
to its version / selected option.
PIN #
P1
P2
P3
P4
P5
P6
P7
DESIGNATION
V
IN
V
O
GND
TRIM
ENABLE
PGood
P
Input Voltage
Output Voltage
Common Ground
Output Voltage Adjustment [OPTION]
Output Voltage Enable
Power Good [OPTION]
Load Current Active Sharing [OPTION]
INDUSTRY STANDARD PINOUT
When ordered with no options, the module comes with only 4 pins – Vin, Gnd, Vout and Enable – and is compatible
with other leading manufacturer’s footprint. The PGood, Active Current Share, and Trim pins are options that can be
ordered with any model number. For the optional trim function add a (-9) to the end of the standard part number. For
the optional current share and PGood signal in addition to the trim function, add (-9MA) to the end of the part
number. Please refer to the Part Number Ordering Scheme section.
Note: When using the trim function, this module offers much more trim flexibility than the competitive footprint and also
requires a jumper between the two footprints to be source compatible. Contact Factory for applications note.
V
IN
Current
Share
Enable
Trim
GND V
O
PGood
Figure 1. Pin Assignment Viewed from Top of Board.
MODEL: APC08 SERIES
OCTOBER 4, 2004 - REVISION 03
SHEET 7 OF 23
ASTEC [ Astec America, Inc ]
