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LP3941A

National Semiconductor
Part Number LP3941A
Manufacturer National Semiconductor
Description Cellular Phone Power Management
Published Apr 4, 2010
Detailed Description May 2004 www.DataSheet4U.com LP3941A Cellular Phone Power Management Unit LP3941A Cellular Phone Power Management Unit...
Datasheet PDF File LP3941A PDF File

LP3941A
LP3941A

Overview
May 2004 www.
DataSheet4U.
com LP3941A Cellular Phone Power Management Unit LP3941A Cellular Phone Power Management Unit General Description LP3941A is a complete power management IC designed for a cellular phone.
It contains 11 low noise low dropout regulators, a linear charger for Li-Ion battery, a backup battery charger, real time clock supply regulator, three open drain drivers, two comparators and high speed I2C compatible serial interface to program individual regulator output voltages as well as on/off control.
LP3941 is available in a LLP48 package.
n Three open drain drivers to control a RGB LED n I2C compatible serial interface for maximum flexibility Applications n GSM/EDGE cellular handsets n Wideband CDMA cellular handsets Key Specifications n n n n 3.
0V to 5.
5V Input Voltage Range 27 µVRMS Output noise 2% (typical) Output Voltage Accuracy 1% Charger Voltage Accuracy Features n n n n 11 low dropout, low noise LDOs.
Dedicated low current LDO for real time clock supply.
Back-up battery charger A constant current / constant voltage battery charger controller with charge status indication via I2C compatible interface.
Typical Application 20094501 © 2004 National Semiconductor Corporation DS200945 www.
national.
com LP3941A Connection Diagrams and Package Mark Information 48-Pin Leadless Leadframe Package See NS Package Number LQA48B www.
DataSheet4U.
com 20094503 20094502 Note: Circle marks pin 1 position.
Pin 1 name is N/C.
Bottom View Top View 20094517 Note: The actual physical placement of the package marking will vary from part to part.
The package markings “UZYY” designate assembly and manufacturing information.
“TT” is a NSC internal code for die traceability.
Both will vary considerably.
“3941LQA” identifies the device.
Package Mark — Top View Ordering Information Order Number LP3941LQ-A LP3941LQX-A Package Marking LP3941LQA LP3941LQA Supplied As 250 units, Tape-and-Reel 2500 units, Tape-and-Reel Note: *See LP3941A register table and...


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