LM3279TLE/NOPB

开关稳压器 Buck-Boost Cnvtr w/ MIPI RFFE IF

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