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SC488 - Complete DDR1/2/3 Memory Power Supply

Datasheet Summary

Description

The SC488 is a combination switching regulator and linear source/sink regulator intended for DDR1/2 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 under-voltage 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 preview – SC488

Datasheet Details

Part number SC488
Manufacturer Semtech Corporation
File Size 855.93 KB
Description Complete DDR1/2/3 Memory Power Supply
Datasheet download datasheet SC488 Datasheet
Additional preview pages of the SC488 datasheet.

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Full PDF Text Transcription

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POWER MANAGEMENT Description The SC488 is a combination switching regulator and linear source/sink regulator intended for DDR1/2 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 on-time 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 sink 2.8A peak curwww.DataSheet4U.com rents. 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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