AIC1384

FEATURES Source and Sink Current Capability Suspend To RAM Functionality Support DDR (1.25VTT) and DDR (0.9VTT) Requirements Low Output Voltage Offset, ±20mV High Accuracy Output Voltage at Full-Load Low External Component Count No external resistor required Current Limit protection Thermal Protection SOP-8 and SOP-8 Exposed Pad (Heat Sink) Package APPLICATIONS Mother board Graphic cards DDR and DDR termination voltage AIC1384 DDR Termination Regulator DESCRIPTION The AIC1384 linear regulator is designed to deliver 1.5A continuous current and up to 3A peak transient currents for termination of DDRSRAM. The AIC1384 contains a high-speed operational amplifier to supply superior load transient response. It also includes a VSENSE to provide excellent load regulation and VREF output as a reference for the chipset and DIMMs. The AIC1384 supply accurate VTT and VREF without external resistors that save PCB areas. The AIC1384 also features an active low shutdown pin that provides Suspend To RAM (STR) functionality. The VTT will remain high impedance when in shutdown, but VREF will keep active. The advantage of power saving can be obtained through low 150µA (DDR ) quiescent current. Built in current limiting in source and sink mode, with thermal shutdown provide maximal protection to the AIC1384 against fault conditions. TYPICAL APPLICATION CIRCUIT SD VREF=1.25V 1 2 3 4 10nF GND VTT 8 SD PVIN VSENSE AVIN 7 6 VREF VDDQ 5 VDDQ=2.5V AIC1384 VTT=1.25V Cout 22uF VIN=2.5V Cin ...