
CM8501C
1.5A B
US
 T
ERMINATOR
GENERAL DESCRIPTION 
The CM8501C is a low cost switching regulator designed to 
provide a desired output voltage or termination voltage for 
various applications by converting voltage supplies ranging 
from 2.0V to 4.5V. The CM8501C 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 CM8501C 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 regulated output voltage of 
CM8501C is internally set to be 50% of the applied VCCQ. 
The switching regulator is capable of sourcing or sinking up to 
1.5A of current while regulating an output V 
TT
 voltage to 
within 3% or less. 
The CM8501C provides low profile 8-pin PSOP package to 
save system space. 
2002/09/30 
Rev. 1.0
                 Champion Microelectronic Corporation 
Page 1 
 FEATURES 
! 
Patent Filed #6,452,366 
! 
8-pin SOP packages  
! 
Source and sink up to 1.5A, no heat sink required 
! 
Peak Current to 3A 
! 
Integrated Power MOSFETs 
! 
Output voltage can be programmed by external resistors 
! 
Separate voltages for VCCQ and PVDD 
! 
V OUT of ±3% or less at 1.5A 
! 
Minimum external components 
! 
Shutdown for standby or suspend mode operation 
! 
Thermal shutdown protection 
! 
Soft start 
24 Hours Technical Support---WebSIM 
Champion provides customers an online circuit simulation tool 
called WebSIM. You could simply logon our website at 
www.champion-micro.com for details. 
APPLICATIONS 
! 
Mother Board  
! 
PCI/AGP Graphics  
! 
Game/ Play Station 
! 
Set Top Box 
PIN CONFIGURATION 
! 
IPC 
! 
SCSI-III Bus terminator 
! 
Buck Converter
SOP-8 (S08) 
Top View 
1
2
3
4
8
7
6
5
VCCA
VCCQ
AGND
SD
PVDD
VL
PGND
VFB