Texas Instruments (TI) has added two new RF DC/DC switching converters to its portfolio of RF power management integrated circuits (ICs).
The new National LM3242 and LM3243 are designed to meet stringent RF performance requirements and enable dynamic optimisation of the PA output power, saving up to 50% or more battery current consumption and reducing the PA heat by up to 30 degrees C.
LM3242 and LM3243 together with the National LM3241 extend battery life and reduce heat dissipated in battery-powered 2G, 3G and 4G long term evolution (LTE) portable devices such as smartphones and tablets.
The LM3242 is compatible with 3G and 4G applications and features a 9-mm square solution size.
The LM3243 includes an active current assist and analogue bypass mode, which enables support for 2G, 3G and 4G applications while maintaining output regulation and minimal solution size.
The duo RF DC/DC switching converters provides an automatic transition between modes of operation and optimises efficiency during all load and battery conditions.
LM3242 supports up to 1-A and is compatible with 3G and 4G applications while LM3243 supports up to 2.5-A and is compatible with 2G, 3G and 4G applications.
