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SC480 - Complete DDR1/2/3 Memory Power Supply

Description

The SC480 is a combination switching regulator and linear source/sink regulator intended for DDR1/2/3 memory systems.

The purpose of the switching regulator is to generate the supply voltage, VDDQ, for the memory system.

Features

  • include cycle-by-cycle current limiting, digital soft-start, over-voltage and undervoltage protection and a power good flag. For the VTT regulator, the output voltage tracks REF, which is ½ VDDQ to provide an accurate termination voltage. The VTT output is generated from a 1.2V to VDDQ input by a linear source/sink regulator which is designed for high DC accuracy, fast transient response, and low external component count. All three outputs (VDDQ, VTT and REF) are actively discharged when VDDQ is.

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Datasheet Details

Part number SC480
Manufacturer SEMTECH
File Size 895.82 KB
Description Complete DDR1/2/3 Memory Power Supply
Datasheet download datasheet SC480 Datasheet

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Full PDF Text Transcription

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POWER MANAGEMENT Description The SC480 is a combination switching regulator and linear source/sink regulator intended for DDR1/2/3 memory systems. The purpose of the switching regulator is to generate the supply voltage, VDDQ, for the memory system. It is a pseudo-fixed frequency constant ontime controller designed for high efficiency, superior DC accuracy, and fast transient response. The purpose of the linear source/sink regulator is to generate the memory termination voltage, VTT, with the ability to source and www.DataSheet4U.com sink a 3A peak current. For the VDDQ regulator, the switching frequency is constant until a step in load or line voltage occurs at which time the pulse density, i.e.
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