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Diodes Incorporated AP2303 DDR LDO Regulator

Diodes Incorporated AP2303 DDR LDO Regulator is a low dropout linear regulators to generate termination voltage of DDR-SDRAM systems. The regulator can source or sink up to 1.75A current continuously. The output voltage is regulated to track tightly with the reference voltage (1/2VDDQ) within ±10mV. The AP2303 supports soft start-up when used to turn on the VCNTL and VREFEN. It integrates a shutdown circuit that will be triggered once the voltage of VIN, VCNTL or VREFEN falls below a certain value. The AP2303 features over temperature protection and current limit protection for both source and sink. AP2303 is available in packages of SOIC-8 and PSOP-8.

Features

  • Support DDR-II (VTT =0.9V), DDR-III (VTT =0.75V), DDR-IIIL (VTT =0.675V), DDR-IV (VTT =0.6V) application
  • Source and sink up to 1.75A current
  • ±2% (Max.) Output voltage accuracy over full load
  • Soft start - up and shutdown along with VIN , VCNTL and VREFEN rising and shutdown along with VIN , VCNTL and VREFEN dropping
  • Flexible output by 2 external resistors
  • Requires minimum 10μF output ceramic capacitor for application
  • Current limit protection for both source and sink
  • OTSD Protection
  • Totally lead - free and fully RoHS compliant
  • Halo gen and antimony free. "Green" device

Features

  • DDR-II/DDR-III/DDR-IIIL/DDR-IV Memory system
  • Desktop PC, notebook mother board
  • Graphic card
  • STB, LCD-TV, web-TV

Block Diagram

Block Diagram - Diodes Incorporated AP2303 DDR LDO Regulator

Typical Application Circuit

Application Circuit Diagram - Diodes Incorporated AP2303 DDR LDO Regulator
Published: 2015-01-06 | Updated: 2022-03-11