LM3243 Description
The LM3243 is a DC-DC converter optimized for powering multi-mode 2G, 3G, and 4G RF power amplifiers (PAs) from a single Lithium-Ion cell. The LM3243 steps down an input voltage from 2.7 V to 5.5 V to a dynamically adjustable output voltage of 0.4 V to 3.6 V. The output voltage is set through a VCON analog input that adjusts the output voltage to ensure efficient operation at all power levels of the RF PA.
LM3243 Key Features
- 1 Input Voltage Range: 2.7 V to 5.5 V
- Analog Bypass Function with Low Dropout
- Maximum Load Current: 2.5 A in PWM Mode
- PWM Switching Frequency: 2.7 MHz (Average)
- Modulated Switching Frequency to Aid Rx Band
- Operates From a Single Li-ion Cell
- Current and Thermal Overload Protection
- ACB Reduces Inductor Requirements and Size
- Minimum Total Solution Size by Using Small