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The AP2303 is a low dropout linear regulator to generate termination voltage of DDR-SDRAM system. 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.
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.
DDR-II/DDR-III/DDR-IIIL/DDR-IV Memory System
Desktop PC, Notebook Mother Board
STB, LCD-TV, Web-TV
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
Output Voltage Accuracy Over Full Load: ±2% (Max.)
Soft Start-up and Shutdown along with VIN, VCNTL and VREFENRising 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
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device
Compliance (Only Automotive supports PPAP)
VIN (Max) (V)
VIN (Min) (V)
Adjustabe VFB (V)
Iq (typ) (µA)
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage