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CM8566 2A ADJUSTABLE LINEAR REGULATOR GENERAL DESCRIPTION The CM8566 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. The CM8566 is capable of sourcing or sinking up to 2A of current while regulating an output VOUT voltage . The CM8566 provides low profile 8-pin SOIC package to save system space. FEATURES 8-pin SOIC w/ power pad 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 2007/02/01 Rev. 1.0 Champion Microelectronic Corporation Page 1 CM8566 2A ADJUSTABLE LINEAR REGULATOR PIN DESCRIPTION Pin No. 8-Pin 1 2 3 4 5/7/8 6 Symbol VIN GND REFEN VOUT NC VCNTL Voltage supply for internal circuits 6 V Input Power Power Ground Reference Voltage Input and Chip Enable Output Voltage 6 6 V V Description Operating Rating Min. Typ. 2.5/1.8 Max. 6 Unit V ORDERING INFORMATION Part Number CM8566IS CM8566GIS 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 5-Pin Block Diagram VCCA VIN Current Limit Protection REFEN Control + 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 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 2007/02/01 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)..................... 260C Thermal Resistance(JC)...................... 14C/W (PSOP-8) Thermal Resistance(JA).................................. 75C/W Output RMS Current, Source or Sink ................................2A Storage Temperature ................................. -65C to 125C ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply TA=25C; 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 VOS VLOAD ISHDN VIN Input Voltage Range (DDR l/ll) VCNTL SHORT CIRCUIT PROTECTION ILIMIT IQ Current Limit Quiescent Current IL=2.0A --2.5 1.4 -3 A mA Parameter Output Offset Voltage Load Regulation (DDR I/II) Current in Shutdown Mode Test Conditions Min. IOUT=0A (Note 2) IL: 0A -> 2A IL: 0A -> -2A REFEN<0.2V, RL = 180 Keep VCNTLVIN on operation power on and power off sequences 3.3 6 -20 ---1.6 Typ. -5 0.5 0.5 1 2.5/1.8 Max. 20 2 2 90 -V A mV % Unit OVER THERMAL PROTECTION TCASE Thermal Shutdown Temperature Thermal Shutdown Hysterresis SHUTDOWN FUNCTION Shutdown Threshold Trigger Output = High Output = Low 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. 0.8 ----0.2 V 3.3VVCNTL5V Guaranteed by design --100 30 -- 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 and sourcing 2A of current without an external heat sink. The CM8566 integrates power MOSFETs that are capable of source and sink2A 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 CM8566, 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 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 , JA = 75/W Copper Area = 10mm , JA = 64/W 2 Copper Area = 30mm , JA = 54/W 2 Copper Area = 50mm , JA = 51/W 2 Copper Area = 70mm , JA = 49/W 2 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) 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 5F, No. 11, Park Avenue II, Science-Based Industrial Park, HsinChu City, Taiwan 300 T E L : +886-3-567 9979 F A X : +886-3-567 9909 http://www.champion-micro.com Sales & Marketing 11F, No. 306-3, Sec. 1, Ta Tung Rd., Hsichih, Taipei Hsien, Taiwan 221 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 |
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