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| CM8562B 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR GENERAL DESCRIPTION The CM8562B 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 CM8562B is capable of sourcing or sinking up to 1.8A of current while regulating an output VOUT voltage to within 2%(DDR-I) , 3% (DDR-ll) or less . The CM8562B provides low profile 8-pin SOIC package to save system space. FEATURES Ideal for DDR-lDDR-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 1.8A , 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 VO UT VIN 5 1 2 3 GND 4 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation VCCA 5 Page 1 CM8562B 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR 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 VOUT 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 CM8562BIS CM8562BIN252 CM8562BGIS* CM8562BGIN252* *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 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation Page 2 CM8562B 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR 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 VIN VCCA CIN 470uF CVCCA 10uF GND REFEN VOUT VFB R3 COUT 200uF VOUT Q1 R2 EN CSS 1uF R4 Application Circuit as Adjustable LDO 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation Page 3 CM8562B 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. VIN, VCCA, VFB ...........................................................7V ............................. -65C to 125C Lead Temperature (Soldering, 5 sec).................... 260C Thermal Resistance(JC)................... 14C/W (PSOP-8) Thermal Resistance(JC)...................... 8C/W (TO-252) Thermal Resistance(JA)................................. 75C/W Output RMS Current, Source or Sink ...............................1.8A Storage Temperature 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) CM8562B 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 2 110 25 VREFEN < VIN VREFEN < VCCA - 1.9V 125 30 135 35 Typ. Max. 20 1 2/3 2/3 0.4 0.25 230 110 6 6 Symbol VOS IOP VLOAD Parameter Output Offset Voltage Operating Current at VIN Load Regulation (DDR I/II) Test Conditions IOUT=0A (Note 2) No load, Cout=200uF IL: 0A -> 1.8A IL: 0A -> -1.8A VCCA>VOUT+1.9V Iout=1.8A VCCA>VOUT+1.9V Iout=1.5A At Room Temp. REFEN<0.2V, RL = 10 Ohm No Load RL = 10 Ohm Unit mV mA % % V V A A V V A A A VDROPOUT Dropout Voltage ICCQ ISHDN VIN VCCA ILIMIT ISC,VIN ISC,GND THSD Quiescent Current at VCCA 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 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation Page 4 CM8562B 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR FUNCTIONAL DESCRIPTION The CM8562B is a linear regulator that is capable of sinking and sourcing 1.8A of current without an external heat sink. The CM8562B integrates power MOSFETs that are capable of source and sink 1.8A 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 CM8562B, 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 CM8562B. 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. 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation Page 5 CM8562B 1.8A SINK & SOURCE 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 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation Page 6 CM8562B 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR PACKAGE DIMENSION 8-Pin SOP w/ Power Pad (PS08) 5-Lead TO-252 (N252) A B H J C M D S P G Side View K Front View 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation L M Page 7 CM8562B 1.8A SINK & SOURCE 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 7F-6, No.32, Sec. 1, Chenggong Rd., Nangang District, Taipei City 115, Taiwan T E L : +886-2-2788 0558 F A X : +886-2-2788 2985 2008/04/15 Rev. 1.0 Champion Microelectronic Corporation Page 8 |
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