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SC486 - Complete DDR1/2/3 Memory Power Supply

General Description

The SC486 is a combination switching regulator and linear source/sink regulator intended for DDR1/2/3 memory systems.

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

Key Features

  • include cycle-by-cycle current limiting, digital soft-start, power good (all VDDQ only) and over-voltage and under-voltage protection (VDDQ and VTT). All 3 outputs (VDDQ, VTT and REF) are actively discharged when VDDQ is disabled, reducing external component count and cost. The SC486 is available in a 24 pin MLPQ 4mmx4mm Lead-free package. SC486 Features ‹ DDR1, DDR2 and DDR3 compatible ‹ Constant on-time controller for fast dynamic ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ response on VDDQ Programmab.

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Datasheet Details

Part number SC486
Manufacturer SEMTECH
File Size 420.63 KB
Description Complete DDR1/2/3 Memory Power Supply
Datasheet download datasheet SC486 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Complete DDR1/2/3 Memory Power Supply POWER MANAGEMENT Description The SC486 is a combination switching regulator and linear source/sink regulator intended for DDR1/2/3 memory systems. The switching regulator is used 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 linear source/sink regulator is used to generate the memory termination voltage, VTT, with the ability to source and sink a 3A peak current. www.DataSheet4U.com 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.