CM8562 - Champion Microelectronic Corp.

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 1

GENERAL DESCRIPTION

FEATURES

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-II) or less.

The CM8562 provides low profile 8-pin SOIC package to save

system space.

 Ideal for DDR-I and DDR-II

 8-pin SOIC w/ power pad package, 5-Lead TO-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

VIN

VFB

VOUT

PGND

AGND

VCCA

REFEN

TO-252 (N252)

Top View

123

VIN

VOUT

VCCA

GND

REFEN

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 2

PIN DESCRIPTION

Pin No. Operating Rating

5-Lead 8-Pin Symbol Description Min. Typ. Max. Unit

1 1 VIN Input Power 1 2.5/1.8 6 V

2 VFB Feedback node for the VOUT 6 V

2 3,4 VOUT Output Voltage 6 V

4 5 REFEN Reference Voltage Input and Chip Enable VCCA-1.9 V

5 6 VCCA Voltage supply for internal circuits 6 V

3 7 AGND Analog Ground

8 PGND Power Ground

ORDERING INFORMATION

Part Number Temperature Range Package

CM8562IS -40℃ to 85℃ 8-Pin SOP (S08)

CM8562IN252 -40℃ to 85℃ 5-Lead TO-252 (N252)

CM8562GIS* -40℃ to 85℃ 8-Pin SOP (S08)

CM8562GIN252* -40℃ to 85℃ 5-Lead TO-252 (N252)

*Note: G : Suffix for Pb Free Product

BLOCK DIAGRAM

Current Limit

Thermal

VCCA

GND

VIN

Protection

Control

REFEN

VOUT

5-Pin Block Diagram

REFEN

Control

Current Limit

Protection

VCCA

VFB

PGND

Thermal

VIN

VOUT

8-Pin Block Diagram

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 3

APPLICATION CIRCUITS

VIN

CSS

1uF

VCCA

VOUT

100k

CIN

470uF

VIN

VCCA

REFEN

GND

VOUT

VFB

CVCCA

10uF

8-Pin SOIC Device: with VFB Pin

COUT

200uF

5-Lead TO-252 Device: no VFB Pi

100k

Application Circuit as VTT Termination

CIN

470uF

VIN

VOUT

VIN

VCCA

REFEN

GND

VOUT

VFB

CVCCA

10uF

VCCA

R1 & R2 to fix the Vref,

and Vout will follow Vref

CSS

1uF

COUT

200uF

Application Circuit as Fixed LDO

VIN

VCCA

REFEN

GND

VOUT

VFB

R2 CSS

1uF

VOUT

VIN

CIN

470uF

COUT

200uF

R3 & R4 to set VFB, and

Vout range could be

adjusted from 0V to VIN

CVCCA

10uF

VCCA

Application Circuit as Adjustable LDO

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 4

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, VFB …................................…....……………..7V Lead Temperature (Soldering, 5 sec)……………….. 260°C

Output RMS Current, Source or Sink .....…………........…...2A Thermal Resistance (θJC)………..…… 14°C/W (PSOP-8)

Thermal Resistance (θJC)………..…… 8°C/W (TO-252)

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)

CM8562

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 -> 2A 0.8/1.2 2/3 %

｜ΔVLOAD｜ Load Regulation (DDR I/II) IL: 0A -> -2A 0.8/1.2 2/3 %

VCCA>VOUT+1.9V,

IOUT=2A 0.3 0.4 V

VDROPOUT Dropout Voltage VCCA>VOUT+1.9V,

IOUT=1.5A 0.2 0.25 V

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 2.5/1.8 6 V

VCCA Input Voltage Range (Note 3) RL = 10 Ohm 3.15 3.3 6 V

SHORT CIRCUIT PROTECTION

ILIMIT Current Limit 5 A

ISC,VIN Short Current Sinking 2 A

ISC,GND Short Current Sourcing 2 A

OVER THERMAL PROTECTION

THSD Thermal Shutdown Temperature 3.15V<=VCCA<=6V 125 150 155 ℃

Thermal Shutdown Hysteresis 25 30 35 ℃

REFEN FUNCTION

REFEN Threshold

VREFEN < VIN

VREFEN < VCCA – 1.9V 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

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 5

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.

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.

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.

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 6

PACKAGE DIMENSION

8-Pin SOP w/ Power Pad (PS08)

5-Lead TO-252 (N252)

Front View

Side View

CM8562

2A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR

2004/06/01 Preliminary Rev. 1.2 Champion Microelectronic Corporation Page 7

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.

HsinChu Headquarter Sales & Marketing

5F, No. 11, Park Avenue II,

Science-Based Industrial Park,

HsinChu City, Taiwan 300

11F, No. 306-3, Sec. 1, Ta Tung Rd.,

Hsichih, Taipei Hsien,

Taiwan 221

T E L : +886-3-567 9979 T E L : +886-2-8692 1591

FAX : +886-3-567 9909 F A X : +886-2-8692 1596

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