CM8500A Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – 3A BUS TERMINATOR

CM8500A
3A BUS TERMINATOR
GENERAL DESCRIPTION
FEATURES
The CM8500A is a switching regulator designed to provide a
desired output voltage or termination voltage for various
applications by converting voltage supplies ranging from 2.0V
to 5.0V. The CM8500A can be implemented to produce
regulated output voltages in two different modes. In the
default mode, when the VIN/2 pin is open, the output voltage
is 50% of the VCCQ. The CM8500A can also be used to
produce various user-defined voltages by forcing a voltage on
the VIN/2 pin. In this case, the output voltage follows the
VIN/2 pin input voltage. The switching regulator is capable of
sourcing or sinking up to 3A of current while regulating an
output V _TT voltage to within 3% or less.
The CM8500A, used in conjunction with series termination
resistors, provides an excellent voltage source for active
termination schemes of high speed transmission lines as
those seen in high speed memory buses and distributed
backplane designs.
The voltage output of the regulator can be used as a
termination voltage for other bus interface standards such as
SSTL, CMOS, Rambus ™ ,GTL+, VME, LV-CMOS, LV-TTL,
and PECL.
◆ Patent Filed #6,452,366
◆ pin PTSSOP and PSOP package
◆ Source and sink up to 3A, no heat sink required
◆ Peak Current to 6A
◆ Integrated Power MOSFETs
◆ Output voltage can be programmed by external resistors
◆ Separate voltages for VCCQ and PVDD
◆ V OUT of ±3% or less at 3A
◆ Minimum external components
◆ Shutdown for standby or suspend mode operation
◆ Thermal shutdown protection
◆ 6A Low Noise Current Limit Protection
◆ External Soft Start
◆ Rail to Rail output Buck Converter
APPLICATIONS
◆ Mother Board
◆ PCI / AGP Graphics
◆ Game / Play Station
◆ Set Top Box
◆ IPC
◆ SCSI-III Bus terminator
◆ Buck Converter
PIN CONFIGURATION
PSOP-16 (PS16)/PTSSOP-16 (PT16)
Top View
1
VCC 1
VC C2
16
2
PVDD1
PVDD2
15
3
VL1
VL2
14
4
PG N D 1
PG N D 2
13
5
AG N D
AG N D
12
6
SD
VFB
11
7
V IN /2
VC CQ
10
8
AGSEN
AG N D
9
2008/01/16
Champion Microelectronic Corporation
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