Description
●The LM3279 is a buck-boost DC/DC converter designed to generate output voltages above or below a given input voltage and is particularly suitable for Power Amplifiers operating from single-cell Li-Ion batteries in portable applications.
●Features
●• MIPI® RFFE Digital Control Interface
●• High-Efficiency PFM and PWM Modes with Internal Seamless Transition
●• Operates from a Single Li-Ion Cell: 2.7 V to 5.5 V
●• Adjustable Output Voltage:
● – RFFE Digital Control: 0.4 V to 4.2 V
● – Analog Control: 0.5 V to 4.2 V
●• 1-A Maximum Load Capability for VBATT ≥ 3.2 V, VOUT = 3.6 V
●• 2.4-MHz (typ.) Switching Frequency
●• Seamless Buck-Boost Mode Transition
●• Fast Output Voltage Transition: 0.8 V to 4 V in 20µs
●• High-Efficiency: 95% typ. at VBATT = 3.7 V, VOUT = 3.3 V, at 300 mA
●• Input Overcurrent Limit
●• Output Overvoltage Clamp
●• Internal Compensation
●Applications
●• 3G/4G Smartphones
●• RF PC Cards
●• Tablets, eBooks Readers
●• Battery-Powered RF Devices
