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LM3478Q - High Efficiency Low-Side N-Channel Controller

Download the LM3478Q datasheet PDF. This datasheet also covers the LM3478 variant, as both devices belong to the same high efficiency low-side n-channel controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM3478 is a versatile Low-Side N-Channel MOSFET controller for switching regulators.

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

Key Features

  • such as thermal shutdown, short-circuit protection, over voltage protection, etc. 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 40V.
  • 100kHz to 1MHz Adjustable clock frequency.
  • ±2.5% (over temperature) internal reference.
  • 10µA shutdown current (over temperature) Features.
  • LM3478Q in MSOP-8 package is.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3478_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM3478Q-Q1 High-Efficiency Low-Side N-Channel Controller Texas Instruments
LM3478 High-Efficiency Low-Side N-Channel Controller Texas Instruments
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Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM3478 High Efficiency Low-Side N-Channel Controller
LM3475 Hysteretic PFET Buck Controller
LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator
LM3477A High Efficiency High-Side N-Channel Controller for Switching Regulator
LM34 Precision Fahrenheit Temperature Sensors

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.

View original datasheet text
LM3478/LM3478Q High Efficiency Low-Side N-Channel Controller for Switching Regulator LM3478/LM3478Q May 25, 2011 High Efficiency Low-Side N-Channel Controller for Switching Regulator General Description The LM3478 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use in topologies requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478 can be operated at extremely high switching frequency in order to reduce the overall solution size. The switching frequency of the LM3478 can be adjusted to any value between 100kHz and 1MHz by using a single external resistor. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting.