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AP2303

Ddr Bus Termination Regulator

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Description

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.

Feature(s)

  • 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 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 & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Application(s)

  • DDR-II/DDR-III/DDR-IIIL/DDR-IV Memory System
  • Desktop PC, Notebook Mother Board
  • Graphic Card
  • STB, LCD-TV, Web-TV

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Output options Adjustable
Iout (A) 1.75
Vin (Max) (V) 6
Vin (Min) (V) 1.2
Vout (min) 0.6
Vout (max) 3.3
Adjustabe VFB (V) VREFIN
Iq (typ) (µA) 1000
Accuracy 25C 1%
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.52
Operating Temperature (Ambient) (°C) -40 to 85 (°C)
Enable Active H
Channels 1
Output Discharge no
Iq (max)(µA) 1500
VCTL function no

Related Content

Quality Documentation

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site