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LM3481 - High Efficiency Low-Side N-Channel Controller

General Description

The LM3481 is a versatile Low-Side N-FET high performance controller for switching regulators.

It is suitable for use in topologies requiring a low-side FET, such as boost, flyback, SEPIC, etc.

Key Features

  • such as thermal shutdown, short-circuit protection and over voltage protection. Power saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up. Key Specifications.
  • Wide supply voltage range of 2.97V to 48V.
  • 100 kHz to 1 MHz Adjustable and Synchronizable clock frequency.
  • ±1.5% (over temperature) internal reference.
  • 10 µA shutdown current (over temperature) Features.

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LM3481 High Efficiency Low-Side N-Channel Controller for Switching Regulators November 16, 2007 LM3481 High Efficiency Low-Side N-Channel Controller for Switching Regulators General Description The LM3481 is a versatile Low-Side N-FET high performance controller for switching regulators. It is suitable for use in topologies requiring a low-side FET, such as boost, flyback, SEPIC, etc. The LM3481 can be operated at extremely high switching frequencies in order to reduce the overall solution www.DataSheet4U.com size. The switching frequency of the LM3481 can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor or by synchronizing it to an external clock.