CM8562P 2A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR

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1 CM856P GENERAL DESCRIPTION The CM856P 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 V to 6.0V. The desired output voltage could be programmable by two external voltage divider resistors. The CM856P is capable of sourcing or sinking up to A of current while regulating an output VOUT voltage to within %(DDR-I), 3% (DDR-ll) or less. The CM856P provides low profile 8-pin SOIC package to save system space. FEATURES Ideal for DDR-l DDR-ll and DDR-lll 8-pin SOIC w/ power pad package Source and sink up to A, no heat sink required Integrated power MOSFETs Programmable output voltage by external resistors Output voltage could go down to 0.6V Iccq at 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 IPC PCI/AGP Graphics SCSI-III Bus terminator Game/ Play Station Set Top Box PIN CONFIGURATION SOP-8 (S08) Top View GN D 8 GN D GN D 7 3 NC VCC A 6 4 VO U T R EFE N 5 007/05/4 Rev. 0.5 Champion Microelectronic Corporation Page

2 CM856P PIN DESCRIPTION Pin No. Symbol Description Operating Rating Min. Typ. Max. Unit Input Power.5/.8/.5 6 V 3 NC No Connection V 4 VOUT Output Voltage REFEN Reference Voltage Input and Chip Enable -.9 V 6 Voltage supply for internal circuits 6 V,7,8 Ground ORDERING INFORMATION Part Number Temperature Range Package CM856PIS -40 to 85 8-Pin SOP (S08) CM856PGIS* -40 to 85 8-Pin SOP (S08) *Note : G : Suffix for Pb Free Product BLOCK DIAGRAM Current Limit Protection Control REFEN - + VOUT Thermal APPLICATION CIRCUITS CEin 00uF VOUT CEout 00uF C3 4.7uF C4 4.7uF 3 U CM856P NC 4 5 VTT REFEN C 04 R 00K C 04 3 Q R 00K EN 007/05/4 Rev. 0.5 Champion Microelectronic Corporation Page

3 CM856P ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged.,, VFB V Lead Temperature (Soldering, 5 sec).. 60 C Output RMS Current, Source or Sink A Thermal Resistance(θ JC ).. 4 C/W (PSOP-8) Storage Temperature C to 5 C Thermal Resistance(θ JA ) 75 C/W ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply T A =5 C; =+.5V and =+3.3V, VREFEN=.5V) maximum ratings are stress ratings only and functional device operation is not implied. (Note ) Symbol Parameter Test Conditions CM856P Min. Typ. Max. VOS Output Offset Voltage IOUT=0A (Note ) -0 0 mv I Operating Current at No load, Cout=00uF ma OP ΔV LOAD V DROPOUT Load Regulation (DDR I/II) Dropout Voltage Unit I L : 0A -> A 0.8/. /3 % I L : 0A -> -A 0.8/. /3 % >VOUT+.9V Iout=A >VOUT+.9V Iout=.5A V V ICCQ Quiescent Current at At Room Temp μa REFEN<0.V, R L = 0 ISHDN Current in Shutdown Mode 90 0 μa Ohm V Input Voltage Range (Note 3) No Load.5/.8 6 V IN Input Voltage Range (Note 3) R L = 0 Ohm V SHORT CIRCUIT PROTECTION I Current Limit 5 A LIMIT I Short Current Sinking A SC, I Short Current Sourcing A SC, OVER THERMAL PROTECTION THSD Thermal Shutdown Temperature 3.5V<=<=6V REFEN FUNCTION Thermal Shutdown Hysteresis REFEN Threshold VREFEN < VREFEN <.9V Note : Limits are guaranteed by 00% testing, sampling, or correlation with worst case test conditions Note : VOS = VREFEN VOUT V Note 3: Keep >= and >=VREFEN +.9V on operation power on and power off sequences Note 4: Guaranteed by design, not 00% test 007/05/4 Rev. 0.5 Champion Microelectronic Corporation Page 3

4 CM856P FUNCTIONAL DESCRIPTION The CM856P is a linear regulator that is capable of sinking and sourcing A of current without an external heat sink. The CM856P integrates power MOSFETs that are capable of source and sink A 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. INPUTS The input voltage pins () determine the output voltages (VOUT). At CM856P, the desired output voltage could be programmable by two external voltage divider resistors. is suggested to connect to VDDQ of memory module for better tracking with memory VDDQ. OTHER SUPPLY VOLTAGES provide the voltage supply to the logic section and internal error amplifiers of CM856P. 007/05/4 Rev. 0.5 Champion Microelectronic Corporation Page 4

5 DIFFERENT HEATSINK AREA CM856P Thermal Resistance vs. Different Cooper Area Layout Design Dog-Bone Layout Minimum Footprint, θ JA = 75 /W Copper Area = 0mm, θ JA = 64 /W Copper Area = 30mm, θ JA = 54 /W Copper Area = 50mm, θ JA = 5 /W Copper Area = 70mm, θ JA = 49 /W 007/05/4 Rev. 0.5 Champion Microelectronic Corporation Page 5

6 CM856P PACKAGE DIMENSION 8-Pin SOP w/ Power Pad (PS08) θ θ 007/05/4 Rev. 0.5 Champion Microelectronic Corporation Page 6

7 CM856P 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., Park Avenue II, 7F-6, No.3, Sec., Chenggong Rd., Science-Based Industrial Park, Nangang District, Taipei City 5, Taiwan HsinChu City, Taiwan 300 T E L : T E L : FAX: F A X : /05/4 Rev. 0.5 Champion Microelectronic Corporation Page 7