CM8562A
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
GENERAL DESCRIPTION
The CM8562A 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 1V to 6.0V. The desired output voltage could be
programmable by two external voltage divider resistors.
The CM8562A is capable of sourcing or sinking up to 2A of
current while regulating an output VOUT voltage to within
2%(DDR-I) , 3% (DDR-ll) or less .
The CM8562A provides low profile 8-pin SOIC package to
save system space.
FEATURES
Ideal for DDR-l and DDR-ll
8-pin SOIC w/ power pad package
Source and sink up to 2A , 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
APPLICATIONS
Mother Board
PCI/AGP Graphics
Game/ Play Station
Set Top Box
IPC
SCSI-III Bus terminator
PIN CONFIGURATION
SOP-8 (S08)
Top View
GN D
GN D
VCC A
R EFE N
1
2
3
4
VIN
GN D
NC
VO U T
8
7
6
5
2007/01/30
Rev. 1.0
Champion Microelectronic Corporation
Page 1
CM8562A
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
PIN DESCRIPTION
Pin No.
1
3
4
5
6
2,7,8
Symbol
VIN
NC
VOUT
REFEN
VCCA
GND
Input Power
No Connection
Output Voltage
Reference Voltage Input and Chip Enable
Voltage supply for internal circuits
Ground
VCCA-1.9
VCCA-1.9
6
V
V
Description
Min.
1
Operating Rating
Typ.
Max.
2.5/1.8
6
Unit
V
V
ORDERING INFORMATION
Part Number
CM8562AIS
CM8562AGIS*
*Note : G : Suffix for Pb Free Product
Temperature Range
-40℃ to 85℃
-40℃ to 85℃
Package
8-Pin SOP (S08)
8-Pin SOP (S08)
BLOCK DIAGRAM
VCCA
VIN
Current Limit
Protection
REFEN
Control
+
VOUT
-
Thermal
GND
APPLICATION CIRCUITS
VIN
CEin
200uF
VOUT
4
1
1
U1 CM8562A
C3
4.7uF
VIN
GND
NC
VTT
GND
GND
VCCA
REFEN
8
7
2
2
3
VCCA
6
5
1
2
C1
104
1
CEout
200uF
1
R1
VIN
100K
2
EN
C4
4.7uF
C2
104
1
1
R2
100K
3
2
1
2
2
Q1
2
2007/01/30
Rev. 1.0
Champion Microelectronic Corporation
Page 2
CM8562A
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which the device could be permanently damaged.
VIN, VCCA, VFB
…................................…....……………..7V
Storage Temperature
……................……. -65°C to 125°C
Output RMS Current, Source or Sink .....…………........…...2A
Lead Temperature (Soldering, 5 sec)………….…….. 260°C
Thermal Resistance(
θ
JC
)………...……… 14°C/W (PSOP-8)
Thermal Resistance(
θ
JA
)…….………………...…… 75°C/W
(Unless otherwise stated, these specifications apply T
A
=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)
CM8562A
Min.
-20
0.8/1.2
0.8/1.2
0.3
0.2
190
90
1
3.15
2.5/1.8
3.3
5
Sinking
Sourcing
3.15V<=VCCA<=6V
2
2
125
25
VREFEN < VIN
VREFEN < VCCA – 1.9V
150
30
155
35
Typ.
Max.
20
1
2/3
2/3
0.4
0.25
230
110
6
6
ELECTRICAL CHARACTERISTICS
Symbol
V
OS
I
OP
½ΔV
LOAD
½
Parameter
Output Offset Voltage
Operating Current at VIN
Load Regulation (DDR I/II)
Test Conditions
I
OUT
=0A (Note 2)
No load, Cout=200uF
I
L
: 0A -> 2A
I
L
: 0A -> -2A
VCCA>VOUT+1.9V
Iout=2A
VCCA>VOUT+1.9V
Iout=1.5A
At Room Temp.
REFEN<0.2V, R
L
= 10
Ohm
No Load
R
L
= 10 Ohm
Unit
mV
mA
%
%
V
V
μA
μA
V
V
A
A
A
℃
℃
V
DROPOUT
Dropout Voltage
I
CCQ
I
SHDN
V
IN
V
CCA
I
LIMIT
I
SC,VIN
I
SC,GND
THSD
Quiescent Current at V
CCA
Current in Shutdown Mode
Input Voltage Range (Note 3)
Input Voltage Range (Note 3)
Current Limit
Short Current
Short Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
SHORT CIRCUIT PROTECTION
OVER THERMAL PROTECTION
REFEN FUNCTION
REFEN Threshold
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 + 1.9V on operation power on and power off sequences
Note 4:
Guaranteed by design, not 100% test
2007/01/30
Rev. 1.0
Champion Microelectronic Corporation
Page 3
CM8562A
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
FUNCTIONAL DESCRIPTION
The CM8562A is a linear regulator that is capable of sinking
and sourcing 2A of current without an external heat sink.
The CM8562A integrates power MOSFETs that are capable
of source and sink 2A 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.
INPUTS
The input voltage pins (VIN) determine the output voltages
(VOUT). At CM8562A, 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 CM8562A.
OUTPUTS
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.
2007/01/30
Rev. 1.0
Champion Microelectronic Corporation
Page 4
CM8562A
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
DIFFERENT HEATSINK AREA
Thermal Resistance vs. Different Cooper Area Layout Design
Dog-Bone Layout
Minimum Footprint ,
θ
JA
= 75℃/W
Copper Area = 10mm ,
θ
JA
= 64℃/W
2
Copper Area = 30mm ,
θ
JA
= 54℃/W
2
Copper Area = 50mm ,
θ
JA
= 51℃/W
2
Copper Area = 70mm ,
θ
JA
= 49℃/W
2
2007/01/30
Rev. 1.0
Champion Microelectronic Corporation
Page 5
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