LM3279
Overview
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. The LM3279 has four modes of operation: Pulse Width Modulation (PWM), Pulse Frequency Modulation (PFM), standby, and shutdown.
- 1 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 20 µs
- High-Efficiency: 95% typ. at VBATT = 3.7 V, VOUT = 3.3 V, at 300 mA
- Input Overcurrent Limit
