CM8561 1.5A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR GENERAL DESCRIPTION FEATURES The CM8561 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. ! Ideal for DDR-I and DDR-II ! 8-pin SOIC package ! Source and sink up to 1.5A, no heat sink required ! Integrated power MOSFETs ! Programmable output voltage by external resistors ! Output voltage could go down to 0.6V ! Iccq at VCCA ~ 230uA ! Current limit protection and Short Circuit protection ! Thermal shutdown protection ! Shutdown for standby or suspend mode operation ! Minimum external components The CM8561 is capable of sourcing or sinking up to 1.5A of current while regulating an output VOUT voltage to within 2% (DDR-I), 3% (DDR-II) or less. The CM8561 provides low profile 8-pin SOIC package to save system space. APPLICATIONS ! Mother Board ! IPC ! PCI/AGP Graphics ! SCSI-III Bus terminator ! Game/ Play Station ! Set Top Box PIN CONFIGURATION SOP-8 (S08) Top View 2003/07/15 Preliminary Rev. 1.0 1 V IN G ND 8 2 VOUT G ND 7 3 R E FE N G ND 6 4 VCCA G ND 5 Champion Microelectronic Corporation Page 1 CM8561 1.5A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR PIN DESCRIPTION Pin No. Symbol Description Min. 1 VIN Input Power 2 VOUT Output Voltage 5,6,7,8 GND Ground 3 REFEN Reference Voltage Input and Chip Enable 4 VCCA Voltage supply for internal circuits Operating Rating Typ. Max. 2.5/1.8 6 V 6 V VCCA-1.9 V 6 V ORDERING INFORMATION Part Number Temperature Range Package CM8561IS -40℃ to 85℃ 8-Pin SOP (S08) BLOCK DIAGRAM VIN VCCA Current Limit Protection Control REFEN + VOUT - Thermal GND APPLICATION CIRCUITS VCCA VIN EN Q1 R2 GND VIN REFEN CIN 470uF VCCA R1 100k CVCCA 10uF VOUT VOUT CSS 1uF COUT 200uF 100k 2003/07/15 Preliminary Rev. 1.0 Champion Microelectronic Corporation Unit Page 2 CM8561 1.5A 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 VIN, VCCA Lead Temperature (Soldering, 5 sec)……………….. 260°C Thermal Resistance (θ JC )….. ……..………….. .15.7°C/W …….....................................…....……………..7V Output RMS Current, Source or Sink .....…………........…...1.5A ……................……. -65°C to 125°C 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) Symbol Parameter Test Conditions CM8561 Min. VOS Output Offset Voltage IOUT=0A (Note 2) IOP Operating Current at VIN No load, Cout=200uF ｜ΔVLOAD｜ Load Regulation (DDR I/II) ICCQ Quiescent Current at VCCA ISHDN Current in Shutdown Mode VIN Input Voltage Range (Note 3) No Load VCCA Input Voltage Range (Note 3) RL = 10 Ohm 3.15 Typ. -20 Max. Unit 20 mV 1 mA IL: 0A -> 1.5A 0.8/1.2 2/3 % IL: 0A -> -1.5A 0.8/1.2 2/3 % At Room Temp. 190 230 µA 90 110 µA 2.5/1.8 6 V 3.3 6 V REFEN<0.2V, RL = 10 Ohm SHORT CIRCUIT PROTECTION ILIMIT Current Limit ISC,VIN Short Current Sinking 1.5 5 A A ISC,GND Short Current Sourcing 1.5 A 3.15V<=VCCA<=6V 125 150 155 ℃ 25 30 35 ℃ 0.4 0.5 0.6 V OVER THERMAL PROTECTION THSD Thermal Shutdown Temperature Thermal Shutdown Hysteresis REFEN FUNCTION REFEN Threshold VREFEN < VIN VREFEN < VCCA – 1.9V 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 2003/07/15 Preliminary Rev. 1.0 Champion Microelectronic Corporation Page 3 CM8561 1.5A SINK & SOURCE ADJUSTABLE LINEAR BUS TERMINATOR FUNCTIONAL DESCRIPTION The CM8561 is a linear regulator that is capable of sinking INPUTS and sourcing 1.5A of current without an external heat sink. The input voltage pins (VIN) determine the output voltages (VOUT). At CM8561, the desired output voltage could be The CM8561 integrates power MOSFETs that are capable of programmable by two external voltage divider resistors. VIN is source and sink 1.5A of current while maintaining excellent suggested to connect to VDDQ of memory module for better voltage regulation. The output voltage can be regulated within tracking with memory VDDQ. 3% or less by using the external feedback. Separate voltage supply inputs have been added to fit applications with various OTHER SUPPLY VOLTAGES power supplies for the databus and power buses. VCCA provide the voltage supply to the logic section and internal error amplifiers of CM8561. 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. PACKAGE DIMENSION 8-Pin SOP (S08) PIN 1 ID θ θ 2003/07/15 Preliminary Rev. 1.0 Champion Microelectronic Corporation Page 4 CM8561 1.5A 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. CMC products in such applications is understood to be fully at the risk of the customer. Use of 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 F A X : +886-3-567 9909 http://www.champion-micro.com T E L : +886-2-8692 1591 F A X : +886-2-8692 1596 2003/07/15 Preliminary Rev. 1.0 Champion Microelectronic Corporation Page 5