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CM8500AIT

Description
3A BUS TERMINATOR
File Size392KB,13 Pages
ManufacturerETC1
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CM8500AIT Overview

3A BUS TERMINATOR

CM8500A
3A B
US
T
ERMINATOR
GENERAL DESCRIPTION
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.
FEATURES
Patent Filed #6,452,366
16 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
2
3
4
5
6
7
8
VCC2
PVDD2
VL2
PGND2
AGND
VFB
VCCQ
AGND
16
15
14
13
12
11
10
9
VCC1
PVDD1
VL1
PGND1
AGND
SD
VIN/2
AGSEN
2004/12/20
Champion Microelectronic Corporation
Page 1

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Description 3A BUS TERMINATOR 3A BUS TERMINATOR 3A BUS TERMINATOR 3A BUS TERMINATOR 3A BUS TERMINATOR 3A BUS TERMINATOR
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