SC2596 Low Voltage Integrated DDR Termination Regulator POWER MANAGEMENT Description Features The SC2596 is an integrated linear DDR termination Sourcing or sinking 2.5A for DDR-I device, which provides a complete solution for DDR Sourcing or sinking 1.5A for DDR-II termination regulator designs while meeting the JEDEC AV undervoltage lockout CC Reference output requirements of SSTL-2 and SSTL-18 specifications for DDR-SDRAM termination. Minimum number of external components Accurate internal voltage divider The SC2596 regulates up to +/- 2.5A for DDR-I and +/- Disable function, puts device into sleep mode 1.5A for DDR-II application requirements. Thermal shutdown Over current protection V is regulated to track the V voltage over the entire Available in SOIC8-EDP package TT REF current range with shoot through protection. Pb-free, Halogen free, and RoHS/WEEE compliant A V pin is incorporated to provide excellent load SENSE regulation, along with a buffered reference voltage for internal use. Applications DDR-I and DDR-II memory termination The SC2596 also features a disable function which is to SSTL-2 and SSTL-3 termination tri-state the output during Suspend To Ram (STR) states HSTL termination by pulling the EN pin low. PC motherboards Graphics boards Disk drives CD-ROM drives Typical Application Circuit AVCC SC2596 EN VTT EN VTT VDDQ VDDQ VSENSE VREF PVCC VREF 0 September 24, 2009 1 www.semtech.com GND AVCCSC2596 POWER MANAGEMENT PRELIMINARY Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. PrPPPraaaarrrraaaammmmeeeetttteeeerr SSlSmSlyyyymmmmbbbbooooll MmMMmMsaaaaxxxxiiiimmmmuuuum UUsUsUnnnniiiitttts Parameter Symbol Maximum Units PVCC, AVCC, VDDQ, EN to GND -V0.3 to +6.0 O Thermal Resistance Junction to Case 5.5 C/W JC O Thermal Resistance Junction to Ambient 36.5 C/W JA O MTaximum Junction Temperature Range -40 to +125 C J O STtorage Temperature Range -65 to +150 C STG O PTeak IR Reflow Temperature 10-40S 260 C PKG EDSD Rating (Human Body Model) E2S kV Electrical Characteristics (DDR-I) o o Unless otherwise specified: T = -40 C to +125 C, AV = PV = 2.5V, V = 2.5V. J CC CC DDQ PPPrPrPlaaaaarrrrraaaaammmmmeeeeettttteeeeerrr SSSlSlSsyyyyymmmmmbbbbboooooll TTsTTsTneeeeesssssttttt CCCCCooooonnnnndddddiiiiitttttiiiiiooooonnnnnss MMnMMpMniiiiinn TpTTTxTpyyyyypp MxMMMsMxaaaaaxx UUUsUsUnnnnniiiiitttttss RVeference Voltage I=Q0mA0Q.49VDD0Q.5VDD0V.51VDD REF REF OUT VOZutput Impedance I=0-30uA to +30uA 23 REF VREF REF (1) VTT Output Regulation I = 0A OUT (V - V ) I = -1.5A -025 +V25 m TT REF OUT I = +1.5A OUT QIuiescent Current I=00A 400 7A0 u Q LOAD AV Enable Threshold 22.1 2V. CC VZDDQ Input Impedance 1k00 VDDQ QIuiescent Current in Shutdown E0N = 0 105 2A5 u SD EIN Pin Leakage Current E1N = 0 uA Q SD EHN Threshold Voltage V 2 V VL 0.8 VTT Leakage Current in I SD = 0V, VTT = 1.25V, 6Au VTT L O Shutdown at 25 C 2009 Semtech Corp. 2 www.semtech.com