AX1250S

AX1250S 1.5A Sink/Source Bus Termination Regulator  GENERAL DESCRIPTION AX1250S is a linear regulator designed as a cost-effective solution for active termination of DDR SDRAM. The converting voltage range is from 1.3V to 5.5V into a desired output voltage, which is adjusted by two external resistors. The current sourcing and sinking capability of the regulator is up to 1.5A while the output voltage within 2%. This device provides on-chip thermal shutdown and current limit functions for circuit tolerance of the output fault conditions. SOP-8L package is available for all commercial and industrial surface mount applications.  FEATURES - Ideal for DDR-I, DDR-II and DDR-III applications - Capable of sourcing and sinking current 1.5A - Integrated power MOSFETs - Current limiting protection - Thermal shutdown protection - High accuracy output voltage at full load - Output Voltage Traces REFEN Pin Voltage - Low external component count - Shutdown for standby or suspend mode operation with high-Impedance output - SOP-8L Pb-Free Package. 1/9 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.5 Aug.24, 2011 AX1250S  BLOCK DIAGRAM VCNTL Power-OnReset POR Error Amplifier and Soft-Start VOUT VIN VREF Enable EN VREF Thermal Shutdown CurrentLimit THSD GND  PIN ASSIGNMENT The package of AX1250S is SOP-8L; the pin assignment is given by: Name Description ( Top View ) VIN GND REFEN VOUT 1 2 3 4 SOP-8L 8 VCNTL 7 VCNTL 6 VCNTL 5 VCNTL VIN GN...