UR6515DG-SH2-R

UNISONIC TECHNOLOGIES CO., LTD UR6515D 3A DDR BUS TERMINATION REGULATOR DESCRIPTION The UR6515D is a linear regulator sourcing or sinking continuous 2A or up to 3A transient peak current while regulating an output voltage to within 40mV in the DDR SDRAM bus terminator applications. It contains a high speed operational amplifier which provides fast load transient response and only requires 10uF of ceramic output capacitance. The UR6515D output termination voltage tracks the reference voltage applied at VREF pin. A resistor divider connected to VIN, GND and VREF pins is used to force the reference voltage to VREF pin. Additional features include current limiting protection and thermal shutdown protection. LINEAR INTEGRATED CIRCUIT FEATURES *DDR1/ DDR2/DDR3 termination voltage applications *Sink and Source Current -2A Continues Current -Peak 3A for DDR1&DDR2 -Peak 2.5A for DDR3 *Low output voltage offset within 20mV *Source and sink 3A peak current *Adjustable output voltage by external resistors *Integrated power MOS devices *Suspend to RAM(STR) functionality *Current Limiting Protection *Thermal Shutdown Protection *Cost-effective and easy to use *Halogen Free ORDERING INFORMATION Order Number UR6515DG-SH2-R Package HSOP-8 Packing Tape Reel www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd 1 of 9 QW-R101-029.A UR6515D PIN CONFIGURATIONS VIN GND VREF VOUT 1 2 GND 3 4 LINEAR INTEGRATED CIRCUIT 8 7 6 5 NC NC VCNTL NC PIN DESCRIPTION PIN NAME VCNTL GND VIN VREF VOUT PIN TYPE I O I I O PIN DESCRIPTION Power supply pin for the internal control circuits Ground pin Power supply pin for the VOUT output Reference voltage input and active-low shutdown control pin Output voltage pin UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R101-029.A UR6515D BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R101-029.A UR6515D LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT VCNTL Control Voltage VCNTL 6 V VIN Supply Voltage VIN 6 V Power Dissipation (Ta=25°C) PD 1.33 W Junction Temperature TJ 125 °C Storage Temperature TSTG -65 ~ +150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. THERMAL DATA PARAMETER SYMBOL MIN TYP MAX UNIT Junction to Ambient (Note 1) θJA 75 °C/W Junction to Case θJC 28 °C/W Note: 1. θJA is measured in the natural convection at Ta = 25°C on a high effective thermal conductivity test board of JEDEC 51-7 thermal measurement standard RECOMMENDED OPERATING CONDITIONS (Note 1) PARAMETER SYMBOL RATINGS VCNTL Control Voltage VCNTL 5 or 3.3±5% VIN Supply Voltage VIN 2.5~1.5±3% VREF Input Voltage VREF 1.25~0.75±3% Junction Temperature TJ -40~+125 Notes: 1. All voltage values are with respect to the network ground terminal unless otherwise noted. UNIT V V V °C ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified) (VIN=2.5V/1.8V/1.5V, VCNTL=3.3V, VREF=1.25V/0.9V/0.75V, COUT = 10µF (Ceramic)) PARAMETER SYMBOL TEST CONDITIONS INPUT CURRENT Operation Current of VCNTL ICNTL IOUT =0A Standby Current ISTB VREF