General Description
The RT9199 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 devices requirements. The regulator is capable of actively sinking or sourcing up to 2A peak while regulating an output voltage to within 20mV. The output termination voltage can be tightly regulated to track 1/2VDDQ by two external voltage divider resistors or the desired output voltage can be pro-grammed by externally forcing the REFEN pin voltage.

FEATUREs
Ideal for DDR-II VTT Applications
Sink and Source 2A Peak Current
Integrated Power MOSFETs
Generate Termination Voltage for DDR Memory Interfaces
High Accuracy Output Voltage at Full-Load
Output Adjustment by Two External Resistors
Low External Component Count
Shutdown for Suspend to RAM (STR) Functionality with High-Impedance Output
Current Limiting Protection
On-Chip Thermal Protection
RoHS Compliant and 100% Lead (Pb)-Free

APPLICATIONs
Desktop PCs, Notebooks, and Workstations
Graphics Card Memory Termination
Set Top Boxes, Digital TVs, Printers
Embedded Systems
Active Termination Buses
DDR/II Memory Systems