AX1250S Datasheet | AXElite

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 mercial 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 ponent 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  BLOCK DIAGRAM VCNTL Power-On Reset POR Error Amplifier and Soft-Start VOUT VIN VREF Enable EN VREF Thermal Shutdown Current Limit THSD  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 GND REFEN VOUT VCNTL Input Voltage pin Ground pin Reference voltage input and chip enable pin Output Voltage pin Supply Input and Gate drive voltage pin Top Marking  ORDER/MARKING INFORMATION Order Information 2/9 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.5 Aug.24, 2011 ...