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LM3269 - Seamless-Transition Buck-Boost Converter

Description

The LM3269 is buck-boost DC-DC converter designed to generate output voltages above or below a given input voltage and is particularly suitable for portable applications powered by a single-cell Li-ion battery.

Features

  • 1 Operates From a Single Li-Ion Cell: 2.7 V to 5.5 V.
  • Adjustable Output Voltage: 0.6 V to 4.2 V.
  • Automatic PFM or PWM Mode Change.
  • 750-mA Maximum Load Capability for VBATT ≥ 3 V, VOUT = 3.8 V.
  • 2.4-MHz (typical) Switching Frequency.
  • Seamless Buck-Boost Mode Transition.
  • Fast Output Voltage Transition: 1.4 V to 3 V in 10 µs.
  • High-Efficiency: 95% typical at VBATT = 3.7 V, VOUT = 3.3 V, at 300 mA.
  • Input Overcurrent Limit.

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Full PDF Text Transcription

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3269 SNVS793D – NOVEMBER 2011 – REVISED MAY 2015 LM3269 Seamless-Transition Buck-Boost Converter for 3G and 4G RF Power Amplifiers 1 Features •1 Operates From a Single Li-Ion Cell: 2.7 V to 5.5 V • Adjustable Output Voltage: 0.6 V to 4.2 V • Automatic PFM or PWM Mode Change • 750-mA Maximum Load Capability for VBATT ≥ 3 V, VOUT = 3.8 V • 2.4-MHz (typical) Switching Frequency • Seamless Buck-Boost Mode Transition • Fast Output Voltage Transition: 1.4 V to 3 V in 10 µs • High-Efficiency: 95% typical at VBATT = 3.7 V, VOUT = 3.
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