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User's Guide
SNOI158AP–January 2011–Revised MARCH 2013
AN-2105 LM3243 DSBGA Evaluation Board
1 Introduction
The Texas Instruments LM3243 evaluation board is a working demonstration of a step-down DC-DC
converter optimized for powering multi-mode 2G/3G/4G RF power amplifiers (PAs) from a single Lithium-
Ion cell. Output voltage is set using a VCON analog input for controlling power levels and efficiency of the
RF PA.
This user's guide contains information about the evaluation board. For more details and electrical
characteristics, please refer to LM3243 High-Current Step-Down Converter for 2G/3G/4G RF Power
Amplifiers (SNVS782). If you are considering using the LM3243 in a system design, please review the
"PCB Layout Considerations” section of the data sheet.
2 Operating Conditions
The device will operate under the following conditions:
• VIN range: 2.7V to 5.5V
• VOUT Range: 0.4V to 3.6V
• VCON range: 0.16V to 1.44V
• VOUT = 2.5 × VCON
• IOUT range: 0mA to 2.5A
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SNOI158AP–January 2011–Revised MARCH 2013 AN-2105 LM3243 DSBGA Evaluation Board
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