CM8562
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
GENERAL DESCRIPTION
The CM8562 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 CM8562 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 CM8562 provides low profile 8-pin SOIC package to
save system space.
FEATURES
Ideal for DDR-l、DDR-ll and DDR-lll
8-pin SOIC w/ power pad package, 5-Lead SOT-252
package
2 ways to adjust the output, VOUT with VFB pin
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
1
2
3
4
VIN
VFB
VOUT
VOUT
PGND
AGND
VCCA
REFEN
8
7
TO-252 (N252)
Top View
REFEN
6
VOUT
VIN
5
1
2
3
4
2007/05/14
Rev. 1.5
Champion Microelectronic Corporation
VCCA
GND
5
Page 1
CM8562
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
PIN DESCRIPTION
Pin No.
5-Lead
8-Pin
1
1
2
2
4
5
3
3,4
5
6
7
8
Symbol
VIN
VFB
VOUT
REFEN
VCCA
AGND
PGND
Input Power
Feedback node for the V
OUT
Output Voltage
Reference Voltage Input and Chip Enable
Voltage supply for internal circuits
Analog Ground
Power Ground
Description
Min.
1
Operating Rating
Typ.
Max.
2.5/1.8/1.5
6
6
6
VCCA-1.9
6
Unit
V
V
V
V
V
ORDERING INFORMATION
Part Number
CM8562IS
CM8562IN252
CM8562GIS*
CM8562GIN252*
*Note : G : Suffix for Pb Free Product
Temperature Range
-40℃ to 85℃
-40℃ to 85℃
-40℃ to 85℃
-40℃ to 85℃
Package
8-Pin SOP (S08)
5-Lead TO-252 (N252)
8-Pin SOP (S08)
5-Lead TO-252 (N252)
BLOCK DIAGRAM
VCCA
VIN
Current Limit
Protection
REFEN
Control
+
VOUT
-
Thermal
GND
5-Pin Block Diagram
VCCA
VIN
Current Limit
Protection
REFEN
Control
+
VOUT
-
Thermal
PGND
VFB
8-Pin Block Diagram
2007/05/14
Rev. 1.5
Champion Microelectronic Corporation
Page 2
CM8562
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
APPLICATION CIRCUITS
VCCA
VIN
5-Lead TO-252 Device: no VFB Pi
8-Pin SOIC Device: with VFB Pin
R1
100k
VCCA
VIN
CIN
470uF
CVCCA
10uF
GND
REFEN
VOUT
VFB
VOUT
COUT
200uF
*
Q1
R2
100k
EN
CSS
1uF
Application Circuit as VTT Termination
VCCA
VIN
R1 & R2 to fix the Vref,
and Vout will follow Vref
R1
VCCA
VIN
CIN
470uF
CVCCA
10uF
GND
REFEN
VOUT
VFB
COUT
200uF
VOUT
Q1
R2
EN
CSS
1uF
Application Circuit as Fixed LDO
VCCA
VIN
R3 & R4 to set VFB, and
Vout range could be
adjusted from 0V to VIN
R1
VCCA
VIN
CIN
470uF
CVCCA
10uF
GND
REFEN
VOUT
VFB
R3
COUT
200uF
VOUT
Q1
R2
EN
CSS
1uF
R4
Application Circuit as Adjustable LDO
2007/05/14
Rev. 1.5
Champion Microelectronic Corporation
Page 3
CM8562
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
……................……. -65°C to 125°C
Lead Temperature (Soldering, 5 sec)……………….. 260°C
Thermal Resistance(
θ
JC
)………….…… 14°C/W (PSOP-8)
Thermal Resistance(
θ
JC
)…………….…… 8°C/W (TO-252)
Thermal Resistance(
θ
JA
)……………………...…… 75°C/W
Output RMS Current, Source or Sink .....…………........…...2A
Storage Temperature
(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)
CM8562
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
2007/05/14
Rev. 1.5
Champion Microelectronic Corporation
Page 4
CM8562
2A S
INK
& S
OURCE
A
DJUSTABLE
L
INEAR
R
EGULATOR
FUNCTIONAL DESCRIPTION
The CM8562 is a linear regulator that is capable of sinking
and sourcing 2A of current without an external heat sink.
The CM8562 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 CM8562, 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 CM8562.
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.
2007/05/14
Rev. 1.5
Champion Microelectronic Corporation
Page 5
电子工程世界
