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LM3207

National Semiconductor
Part Number LM3207
Manufacturer National Semiconductor
Description Step-Down DC-DC Converter
Published Nov 9, 2006
Detailed Description LM3207 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers April 2007 LM3207 650mA Miniatur...
Datasheet PDF File LM3207 PDF File

LM3207
LM3207

Overview
LM3207 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers April 2007 LM3207 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers with Integrated Vref LDO General Description The LM3207 is a DC-DC converter optimized for powering WCDMA / CDMA RF power amplifiers (PAs) from a single Lithium-Ion cell; however they may be used in many other applications.
It steps down an input voltage from 2.
7V to 5.
5V to a variable output voltage from 0.
8V(typ.
) to 3.
6V(typ.
).
Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA.
The LM3207 also provides a regulated reference voltage (Vref) required by linear RF power amplifiers through an integrated LDO that has a maximum Iref up to 10 mA.
See Ordering Information table on page 2 for Voltage Options.
The LM3207 is available in a 9-pin lead free micro SMD package.
High switching frequency (2MHz) allows use of surfacemount components.
Only four smal...


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