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LM3477 - High Efficiency High-Side N-Channel Controller for Switching Regulator

Download the LM3477 datasheet PDF. This datasheet also covers the LM3 variant, as both devices belong to the same high efficiency high-side n-channel controller for switching regulator family and are provided as variant models within a single manufacturer datasheet.

Description

The LM3477/A is a high-side N-channel MOSFET switching regulator controller.

It can be used in topologies requiring a high side MOSFET such as buck, inverting (buck-boost) and zeta regulators.

The LM3477/A’s internal push pull driver allows compatibility with a wide range of MOSFETs.

Features

  • include internal soft-start and output over voltage protection. The internal soft-start reduces inrush current. Over voltage protection is a safety feature to ensure that the output voltage stays within regulation. The LM3477A is similar to the LM3477. The primary difference between the two is the point at which the device transitions into hysteretic mode. The hysteretic threshold of the LM3477A is one-third of the LM3477. n Frequency compensation optimized with a single capacitor and resistor n.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3-477.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM3477 High Efficiency High-Side N-Channel Controller Texas Instruments
LM3475 Hysteretic PFET Buck Controller Texas Instruments
LM3478 High-Efficiency Low-Side N-Channel Controller Texas Instruments
LM3478Q-Q1 High-Efficiency Low-Side N-Channel Controller Texas Instruments
LM34 Precision Fahrenheit Temperature Sensors Texas Instruments

Other Datasheets by National Semiconductor (Texas Instruments)

Part Number Description
LM3477A High Efficiency High-Side N-Channel Controller for Switching Regulator
LM3475 Hysteretic PFET Buck Controller
LM3478 High Efficiency Low-Side N-Channel Controller
LM3478Q High Efficiency Low-Side N-Channel Controller
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
LM3477/LM3477A High Efficiency High-Side N-Channel Controller for Switching Regulator June 2002 LM3477/LM3477A High Efficiency High-Side N-Channel Controller for Switching Regulator General Description The LM3477/A is a high-side N-channel MOSFET switching regulator controller. It can be used in topologies requiring a high side MOSFET such as buck, inverting (buck-boost) and zeta regulators. The LM3477/A’s internal push pull driver allows compatibility with a wide range of MOSFETs. This, the wide input voltage range, use of discrete power components and adjustable current limit allows the LM3477/A to be optimized for a wide variety of applications. The LM3477/A uses a high switching frequency of 500kHz to reduce the overall solution size.
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