CM8560
3A SINK LINEAR BUS TERMINATOR
& SOURCE ADJUSTABLE
2004/10/13 Rev. 1.1 Champion Microelectronic Corporation Page 1
GENERAL DESCRIPTION
FEATURES
Ideal for DDR-I and DDR-II
5-Lead TO-263 packages
Source and sink up to 3A, no heat sink required
Integrated power MOSFETs
Programmable output voltage by external resistors
Output voltage could go down to 0.6V
Iccq at VCCA less than 500uA
Current limit protection and Short Circuit protection
Thermal shutdown protection
Shutdown for standby or suspend mode operation
Minimum external components
The CM8560 is a low cost linear regulator designed to provide
a desired output voltage or termination voltage for various
applications by converting voltage supplies ranging from 1.6V
to 6.0V. The desired output voltage could be programmable
by two external voltage divider resistors.
The CM8560 is capable of sourcing or sinking up to 3A of
current while regulating an output VOUT voltage to within 2%
(DDR-I), 3% (DDR-II) or less.
The CM8560 provides low profile 5-lead TO-263 package to
save system space.
APPLICATIONS
Mother Board
PCI/AGP Graphics
Game/ Play Station
Set Top Box
IPC
SCSI-III Bus terminator
PIN CONFIGURATION
TO-263 (N263)
Top View
3
2
1
VIN
4
5
VOUT
GND
REFEN
VCCA
CM8560
3A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR
PIN DESCRIPTION Operating Rating
Pin No. Symbol Description Min. Typ. Max. Unit
1 VIN Input Power 2.5/1.8 V
2 VOUT Output Voltage 6 V
3 GND Ground
4 REFEN Reference Voltage Input and Chip Enable VCCA-2.5 V
5 VCCA Voltage supply for internal circuits V
ORDERING INFORMATION
Part Number Temperature Range Package
CM8560IN263 -40℃ to 85℃ 5-Lead TO-263 (N263)
CM8560GIN263* -40℃ to 85℃ 5-Lead TO-263 (N263)
*Note: Add suffix “G” for Pb Free Product
BLOCK DIAGRAM
Current Limit
Thermal
VCCA
GND
+
-
VIN
Protection
Control
REFEN
VOUT
APPLICATION CIRCUITS
EN
VCCA
VOUT
VIN
COUT
200uF
CIN
470uF
R2
100k
CVCCA
10uF
CSS
1uF
Q1
R1
100k
VIN
VCCA
REFEN
GND
VOUT
2004/10/13 Rev. 1.1 Champion Microelectronic Corporation Page 2
CM8560
3A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which the
device could be permanently damaged. Storage Temperature ……................……. -65°C to 125°C
VIN, VCCA …….....................................…....……………..7V Lead Temperature (Soldering, 5 sec)……………….. 260°C
Output RMS Current, Source or Sink .....…………........…...3A Thermal Resistance(θJC )….. ……..…………….. .7.7°C/W
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply TA=25°C;
VIN=+2.5V and VCCA=+3.3V, VREFEN=1.25V) maximum ratings are stress ratings only and functional device operation is not
implied. (Note 1)
CM8560
Symbol Parameter Test Conditions
Min. Typ. Max.
Unit
VOS Output Offset Voltage IOUT=0A (Note 2) -20 20 mV
IOP Operating Current at VIN No load, Cout=200uF 1 mA
IL: 0A -> 3A 0.8/1.2 2/3 %
｜ΔVLOAD｜ Load Regulation (DDR I/II) IL: 0A -> -3A 0.8/1.2 2/3 %
ICCQ Quiescent Current at VCCA At Room Temp. 190 230 µA
ISHDN Current in Shutdown Mode REFEN<0.2V, RL = 10
Ohm 90 110 µA
VIN Input Voltage Range (Note 3) No Load 1.35/1 2.5/1.8 6 V
VCCA Input Voltage Range (Note 3) RL = 10 Ohm 3.75 6 V
SHORT CIRCUIT PROTECTION
ILIMIT Current Limit 5 A
ISC,VIN Short Current Sinking 2 A
ISC,GND Short Current Sourcing 3 A
OVER THERMAL PROTECTION
THSD Thermal Shutdown Temperature 3.75V<=VCCA<=6V 125 150 ℃
Thermal Shutdown Hysteresis 25 30 35 ℃
REFEN FUNCTION
REFEN Threshold
VREFEN < VIN
VREFEN < VCCA – 2.5V 0.4 0.5 0.6 V
Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions
Note 2: VOS = VREFEN – VOUT
Note 3: Keep VCCA >= VIN and VCCA >= VREFEN + 2.5V on operation power on and power off sequences
Note 4: Guaranteed by design, not 100% test
2004/10/13 Rev. 1.1 Champion Microelectronic Corporation Page 3
CM8560
3A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR
FUNCTIONAL DESCRIPTION
The CM8560 is a linear regulator that is capable of sinking
and sourcing 3A of current without an external heat sink.
The CM8560 integrates power MOSFETs that are capable of
source and sink 3A of current while maintaining excellent
voltage regulation. The output voltage can be regulated within
3% or less by using the external feedback. Separate voltage
supply inputs have been added to fit applications with various
power supplies for the databus and power buses.
OUPUTS
The output voltage pins (VOUT) are tied to the databus,
address, or clock lines via an external inductor. Output voltage
is determined by the VIN.
INPUTS
The input voltage pins (VIN) determine the output voltages
(VOUT). At CM8560, the desired output voltage could be
programmable by two external voltage divider resistors. VIN is
suggested to connect to VDDQ of memory module for better
tracking with memory VDDQ.
OTHER SUPPLY VOLTAGES
VCCA provide the voltage supply to the logic section and
internal error amplifiers of CM8560.
PACKAGE DIMENSION
5-Lead TO-263 (N263)
AD
C
B
I
E
L
F
G
K
2004/10/13 Rev. 1.1 Champion Microelectronic Corporation Page 4
CM8560
3A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue
any integrated circuit product or service without notice, and advises its customers to obtain the latest version of
relevant information to verify, before placing orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe
property or environmental damage. CMC integrated circuit products are not designed, intended, authorized, or
warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of
CMC products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer’s applications, the customer should provide adequate design and operating
safeguards.
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Taiwan 221
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2004/10/13 Rev. 1.1 Champion Microelectronic Corporation Page 5
