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LM3281 - 6-MHz Miniature Step-Down DC-DC Converter

General Description

The LM3281 is a high-efficiency low-noise miniature DC-DC converter optimized for powering noisesensitive wireless connectivity chipsets and RF Front End Modules (FEMs) from a single Lithium-Ion cell.

Key Features

  • 1 Operates from a Single Li-Ion Cell (3 V to 5.5 V).
  • 6-MHz (typ. ) PWM Switching Frequency.
  • Fixed Output Voltage: 3.3 V.
  • Up to 1.2-A Maximum Load Capability.
  • High Efficiency: 94% (typ. ) with 3.8-V VIN at 300 mA.
  • Analog Bypass: 60-mV (typ. ) Drop-Out at 600 mA.
  • Low IQ: 16 µA typical, 25 µA maximum.
  • Automatic ECO/PWM/Bypass Mode Change.
  • Forced PWM Mode for Low Output-Voltage Ripple.
  • Soft-Start Limits Input Curr.

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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 LM3281 SNVSA38 – NOVEMBER 2014 LM3281 3.3-V, 1.2-A, 6-MHz Miniature Step-Down DC-DC Converter for Wireless Connectivity Solutions 1 Features •1 Operates from a Single Li-Ion Cell (3 V to 5.5 V) • 6-MHz (typ.) PWM Switching Frequency • Fixed Output Voltage: 3.3 V • Up to 1.2-A Maximum Load Capability • High Efficiency: 94% (typ.) with 3.8-V VIN at 300 mA • Analog Bypass: 60-mV (typ.) Drop-Out at 600 mA • Low IQ: 16 µA typical, 25 µA maximum • Automatic ECO/PWM/Bypass Mode Change • Forced PWM Mode for Low Output-Voltage Ripple • Soft-Start Limits Input Current on Start-Up • Current Overload Protection • Thermal Overload Protection • Small Total Solution Size: < 7.