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LP3917

Part Number	LP3917
Manufacturer	National Semiconductor
Description	CDMA Cellular Phone Power Management
Published	Mar 10, 2007
Detailed Description	com LP3917 CDMA Cellular Phone Power Management Unit December 2006 LP3917 CDMA Cellular Phone Power M...
Datasheet	LP3917 PDF File

Overview

...anagement Unit General Description LP3917 is a complete Power Management Unit designed for CDMA cellular phones.
LP3917 PMU contains 9 low noise low dropout voltage regulators, 2 buck regulators, an USB Transceiver, two comparators and a high speed serial interface to program on/off conditions and output voltages of individual regulators, and to read status information of the PMU.
Buck regulators have an automatic switch to PFM mode at low load conditions allowing very good efficiency also at low output currents.
LDO regulators provide very low noise, 35 uV typ, ideally suited for supplying voltage to RF section.
Two comparators can be used for detecting external accessories like ear plug et...

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