LP3939 Datasheet, PDF (1/7 Pages) National Semiconductor (TI) – Power Amplifier Driver For Dual Band CDMA Handsets

November 2003
LP3939
Power Amplifier Driver for Dual Band CDMA Handsets
General Description
Designed specifically for Qualcomm’s MSM3xxx and
MSM5xxx series, the LP3939 is an integrated device that
provides interface to the baseband processor to power-
switch two independent power amplifiers in dual band appli-
cations. By integrating the discrete components necessary
to achieve the same functions, the LP3939 drastically re-
duces board space and component cost.
Features
n Power-switch for dual band CDMA power amplifier
Key Specifications
n 0.002 µA Quiescent Current (typ)
n LLP16 Package
Applications
n Dual-band CDMA phones with MSM3xxx or MSM5xxx
platform
LP3939 Application Circuit
Note: This application circuit shows the connection interface to a typical Skyworks PA. Connections to other PA vendors may vary slightly.
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© 2003 National Semiconductor Corporation DS200831
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