CM8566 2A ADJUSTABLE LINEAR REGULATOR GENERAL DESCRIPTION FEATURES The CM8566 is a low cost linear regulator designed to 8-pin SOIC w/ power pad package provide a desired output voltage or termination voltage for 2 ways to adjust the output, VOUT with VFB pin various applications by converting voltage supplies ranging Source and sink up to 2A , no heat sink required from 1.6V to 6.0V. The desired output voltage could be Integrated power MOSFETs programmable by two external voltage divider resistors. Programmable output voltage by external resistors The CM8566 is capable of sourcing or sinking up to 2A of Output voltage could go down to 0.6V current while regulating an output VOUT voltage . Iccq at VCCA less than 500uA The CM8566 provides low profile 8-pin SOIC package to Current limit protection and Short Circuit protection save system space. Thermal shutdown protection Shutdown for standby or suspend mode operation Minimum external components APPLICATIONS Mother Board IPC PCI/AGP Graphics SCSI-III Bus terminator Game/ Play Station Set Top Box PIN CONFIGURATION SOP-8 (S08) Top View 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 1 CM8566 2A ADJUSTABLE LINEAR REGULATOR PIN DESCRIPTION Pin No. 8-Pin Symbol Operating Rating Description Min. Typ. Max. Unit 2.5/1.8 6 V 1 VIN Input Power 2 GND Power Ground 3 REFEN Reference Voltage Input and Chip Enable 6 V 4 VOUT Output Voltage 6 V Voltage supply for internal circuits 6 V 5/7/8 6 NC VCNTL ORDERING INFORMATION Part Number Temperature Range Package CM8566IS -40℃ to 85℃ 8-Pin SOP (S08) CM8566GIS -40℃ to 85℃ 8-Pin SOP (S08) BLOCK DIAGRAM VIN VCCA Current Limit Protection Control REFEN + VOUT - Thermal GND 5-Pin Block Diagram VIN VCCA Current Limit Protection Control REFEN + VOUT - Thermal PGND VFB 8-Pin Block Diagram 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 2 CM8566 2A ADJUSTABLE LINEAR REGULATOR APPLICATION CIRCUITS VCCA R1 & R2 to fix the Vref, and Vout will follow Vref VIN Q1 R2 EN CVCCA 10uF VOUT VOUT VFB GND VIN REFEN CIN 470uF VCCA R1 COUT 200uF CSS 1uF Application Circuit as Fixed LDO VCCA R3 & R4 to set VFB, and Vout range could be adjusted from 0V to VIN VIN Q1 EN R2 CVCCA 10uF VOUT VOUT VFB GND VIN REFEN CIN 470uF VCCA R1 R3 CSS 1uF COUT 200uF R4 Application Circuit as Adjustable LDO 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 3 CM8566 2A ADJUSTABLE LINEAR REGULATOR ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. VIN, VCCA, VFB …................................…....….…………..6V Lead Temperature (Soldering, 5 sec)……….……….. 260°C Output RMS Current, Source or Sink .....………….........…...2A Thermal Resistance(θJC)………..……..… 14°C/W (PSOP-8) Storage Temperature ……...................…….. -65°C to 125°C Thermal Resistance(θJA)……………………….…… 75°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) CM8566 Symbol Parameter Test Conditions Unit Min. Typ. Max. IOUT=0A (Note 2) -20 -5 20 IL: 0A -> 2A -- 0.5 2 IL: 0A -> -2A -- 0.5 2 REFEN<0.2V, RL = 180Ω -- 1 90 Keep VCNTL≧VIN on 1.6 2.5/1.8 -- 3.3 6 -- 2.5 -- A IL=2.0A -- 1.4 3 mA Thermal Shutdown Temperature 3.3V≦VCNTL≦5V -- 100 -- ℃ Thermal Shutdown Hysterresis Guaranteed by design -- 30 -- ℃ Output = High 0.8 -- -- Output = Low -- -- 0.2 VOS Output Offset Voltage ｜ΔVLOAD｜ Load Regulation (DDR I/II) ISHDN Current in Shutdown Mode VIN Input Voltage Range (DDR l/ll) VCNTL mV % μA V operation power on and power off sequences SHORT CIRCUIT PROTECTION ILIMIT Current Limit IQ Quiescent Current OVER THERMAL PROTECTION TCASE SHUTDOWN FUNCTION Shutdown Threshold Trigger V Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: VOS Offset is the voltage measurement defined as VOUT subtracted from VREFEN. 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 4 CM8566 2A ADJUSTABLE LINEAR REGULATOR FUNCTIONAL DESCRIPTION The CM8566 is a linear regulator that is capable of sinking INPUTS and sourcing 2A of current without an external heat sink. The input voltage pins (VIN) determine the output voltages (VOUT). At CM8566, the desired output voltage could be The CM8566 integrates power MOSFETs that are capable of programmable by two external voltage divider resistors. VIN is source and sink2A 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 power supplies for the databus and power buses. OTHER SUPPLY VOLTAGES VCCA provide the voltage supply to the logic section and internal error amplifiers of CM8566. 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. 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 5 CM8566 2A ADJUSTABLE LINEAR REGULATOR DIFFERENT HEATSINK AREA Thermal Resistance vs. Different Cooper Area Layout Design Dog-Bone Layout Minimum Footprint , θJA = 75℃/W 2 Copper Area = 30mm , θJA = 54℃/W 2 Copper Area = 10mm , θJA = 64℃/W 2 Copper Area = 50mm , θJA = 51℃/W 2 Copper Area = 70mm , θJA = 49℃/W 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 6 CM8566 2A ADJUSTABLE LINEAR REGULATOR PACKAGE DIMENSION 8-Pin SOP w/ Power Pad (PS08) θ θ 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 7 CM8566 2A ADJUSTABLE LINEAR REGULATOR 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 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 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 8