2017/10/05 2A Sink/Source Bus Termination Regulator

General Description

The EC9175 is a simple, cost-effective and high-speed linear regulator designed to generate termination voltage

in double data rate (DDR) memory system to comply with the JEDEC SSTL_2 and SSTL_18 or other specific

interfaces such as HSTL, SCSI-2 and SCSI-3 etc. devices requirements. The regulator is capable of actively

sinking or sourcing up to 2A while regulating an output voltage to within 40mV. The output termination voltage cab

be tightly regulated to track 1/2VDDQ by two external voltage divider resistors or the desired output voltage can

be programmed by externally forcing the REFEN pin voltage.

The EC9175 also incorporates a high-speed differential   amplifier to provide ultra-fast response in line/load transient.

Other features include extremely low initial offset voltage, excellent load regulation, current limiting in bi-directions

and on-chip thermal shut-down protection. The EC9175 are available in the ESOP8 (Exposed Pad) surface mount

packages.

 

Features

◆Ideal for DDR-I, DDR-II and DDR-III VTT Applications

◆Sink and Source 2A Continuous Current

◆Integrated Power MOSFETs

◆Generates Termination Voltage for SSTL_2, SSTL _18, HSTL, SCSI-2 and SCSI-3 Interfaces.

◆High Accuracy Output Voltage at Full-Load

◆Output Voltage traces REFEN Pin Voltage.

◆Low External Component Count

◆Shutdown for Suspend to RAM (STR) Functionality with High-Impedance Output

◆Current Limiting Protection

◆Thermal Shutdown Protection

◆ESOP-8   with   exposed   pad   Pb-Free Package.

 

Applications

◆Desktop PCs, Notebooks, and Workstations

◆Graphics Card Memory Termination

◆Set Top Boxes, Digital TVs, Printers

◆Embedded Systems

◆Active Termination Buses

◆DDR-I, DDR-II and DDR-III Memory Systems