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LM3243 - Step-Down DC-DC Converter

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.

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 Compliance.
  • Operates From a Si.

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LM3241 Step-Down DC-DC Converter

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3243 SNVS782C – OCTOBER 2010 – REVISED AUGUST 2015 LM3243 High-Current Step-Down Converter for 2G, 3G, and 4G RF Power Amplifiers 1 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 Compliance • Operates From a Single Li-ion Cell (2.7 V to 5.
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