LM3243
Features
- 1 Input Voltage Range: 2.7 V to 5.5 V
- High-Efficiency PFM and PWM Modes With
Internal Synchronous Rectification
- Analog Bypass Function with Low Dropout
Resistance (45 mΩ Typical)
- Dynamically Adjustable Output Voltage: 0.4 V to
3.6 V (Typical) in PFM and PWM Modes
- Maximum Load Current: 2.5 A in PWM Mode
- PWM Switching Frequency: 2.7 MHz (Average)
- Modulated Switching Frequency to Aid Rx Band pliance
- Operates From a Single Li-ion Cell
(2.7 V to 5.5 V)
- Current and Thermal Overload Protection
- ACB Reduces Inductor Requirements and Size
- Minimum Total Solution Size by Using Small
Footprint and Case Size Inductor and Capacitors
2 Applications
- Cellular Phones
- Hand-Held Radios
- RF PC Cards
- Battery-Powered RF Devices
3 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...
