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The LM3203 is a DC-DC converter optimized for powering 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 of 2.7V to 5.5V to an adjustable output voltage of 0.8V to 3.6V. The output voltage is set using a VCON analog input and external resistor dividers for optimizing efficiency of the RF PA at various power levels.
The LM3203 offers 3 modes for mobile phones and similar RF PA applications. Fixed-frequency PWM mode minimizes RF interference. Bypass mode turns on an internal bypass switch to power the PA directly from the battery. Shutdown mode turns the device off and reduces battery consumption to 0.1µA (typ.).
The LM3203 is available in a 10-pin lead free DSBGA package. A high switching frequency (2MHz) allows use of tiny surface-mount components.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM3203 Step-Dwn DC-DC Converter w/Bypass Mode for CDMA/WCDMA RF Pwr Amp datasheet (Rev. D) | 02 Apr 2013 | |
| EVM User's guide | AN-1390 LM3203 Evaluation Board (Rev. B) | 30 Apr 2013 | ||
| Application note | Optimizing RF Power Amplifier System Efficiency Using DC-DC Converters | 21 Mar 2007 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | Download |
|---|---|---|
| DSBGA (YPA) | 10 | View options |
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