May 2004 www.DataSheet4U.com
LP3941A Cellular Phone Power Management Unit
LP3941A Cellular Phone Power Management Unit...
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...