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LP3941LQX-A Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LP3941LQX-A Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 32 page 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 regu- lators, 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 I 2C compatible serial interface to program individual regulator output volt- ages as well as on/off control. LP3941 is available in a LLP48 package. Features n 11 low dropout, low noise LDOs. n Dedicated low current LDO for real time clock supply. n Back-up battery charger n A constant current / constant voltage battery charger controller with charge status indication via I 2C compatible interface. n Three open drain drivers to control a RGB LED n I 2C compatible serial interface for maximum flexibility Applications n GSM/EDGE cellular handsets n Wideband CDMA cellular handsets Key Specifications n 3.0V to 5.5V Input Voltage Range n 27 µV RMS Output noise n 2% (typical) Output Voltage Accuracy n 1% Charger Voltage Accuracy Typical Application 20094501 May 2004 © 2004 National Semiconductor Corporation DS200945 www.national.com |
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