GENERAL DESCRIPTION
The voltage output of the regulator can be used as a termination voltage for DDR SDRAM. Current limits in both sourcing and sinking mode, plus on-chip thermal shutdown make the circuit tolerant of the output fault conditions. Bus Termination Regulator n FEATURES
l Support Both DDR 1 (1.25VTT), DDR 2 (0.9VTT) & DDR 3 (0.75VTT) Requirements l Capable of Sourcing and Sinking Current l Current-limiting Protection l Thermal Protection l Integrated Power MOSFETs l Generates Termination Voltages for SSTL-2 l High Accuracy Output Voltage at Full-Load l Adjustable VOUT by External Resistors l Minimum External Components l Shutdown for Standby or Suspend Mode Operation with High-impedance Output l All AME’s Lead Free Products Meet RoHS Standards n APPLICATIONS
l DDR Memory Termination Supply l Active Termination Buses l Desktop PC/AGP Graphics l Supply Splitters l Set Top Box/IPC 1 Rev. A.01 AME, Inc. AME9172 n Block Diagram VCNTL VIN Bus Termination Regulator Thermal Sensor Thermal + - VOUT & Over Current REFEN Protection circuit + - VCNTL GND 2 Rev.
Analog Microelectronics
