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SC480

Part Number	SC480
Manufacturer	Semtech Corporation
Description	Complete DDR1/2/3 Memory Power Supply
Published	Nov 17, 2008
Detailed Description	POWER MANAGEMENT Description The SC480 is a combination switching regulator and linear source/sink regulator intended fo...
Datasheet	SC480 PDF File

Overview

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.
, frequency, will increase or decrease to counter the transient change in output or input voltage.
After the transient, the frequency will return to steady-state operation.
At lighter loads, the selectable Power-Save Mode enables the PWM converter to reduce its switching frequency and improve efﬁ...

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