LM3218 650 mA Miniature, Adjustable, Step-Down DC-DC Converter with Integrated Inductor for RF Power
Amplifiers
January 21, 2009
LM3218 650 mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power
Amplifiers
General Description
The LM3218 is a DC-DC converter with inductor which is optimized for powering RF power
amplifiers (PAs) from a single Lithium-Ion cell.
It steps down an input
voltage in the range from 2.
7V to 5.
5V to an adjustable output
voltage of 0.
8V to 3.
6V.
Output
voltage is set by using a VCON analog input to control power levels and efficiency of the RF PA.
The LM3218 offers superior electrical performance for mobile phones and similar RF PA applications with a reduc...