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 (1/2V_DDQ) within ±10mV.

The AP2303 supports soft start-up when used to turn on the V_CNTL and V_REFEN. It integrates a shutdown circuit that will be triggered once the voltage of V_IN, V_CNTL or V_REFEN 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.

Application

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

Features

Support DDR-II (V_TT=0.9V), DDR-III (V_TT=0.75V), DDR-IIIL (V_TT=0.675V), DDR-IV (V_TT=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 V_IN, V_CNTLand V_REFEN Rising and Shutdown along with V_IN, V_CNTL and V_REFEN 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

Product Specifications

Product Parameters

Features	N/A
IOUT	N/A A
VIN (Max)	N/A V
VIN (Min)	N/A V
VOUT	N/A V
IQ	0.5 µA
PSRR	N/A dB
VDROPOUT (Max)	0.52 V
Operating Temperature (Ambient)	-40 to 85
Enable Active	N/A
Channels	1

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Orderable Part Number	Authorized Distributor	Quantity	Inventory Date	Buy Online	Region
AP2303MPTR-G1	Digi-Key Electronics	1779	8/11/2020	Buy Now	United States
AP2303MPTR-G1	Mouser Electronics Inc.	6145	8/11/2020	Buy Now	United States
AP2303MTR-G1	Avnet EU	4000	8/11/2020	Buy Now	Germany
AP2303MTR-G1	Digi-Key Electronics	4698	8/11/2020	Buy Now	United States
AP2303MTR-G1	Mouser Electronics Inc.	6672	8/11/2020	Buy Now	United States