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LM3557 - Step-Up Converter

Download the LM3557 datasheet PDF. This datasheet also covers the LM3 variant, as both devices belong to the same step-up converter family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM3557 is a complete solution for white LED drive applications.

Key Features

  • n VIN Range: 2.7V.
  • 7.5V n Small External Components Typical.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3-557.pdf) that lists specifications for multiple related part numbers.

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
LM3557 Step-Up Converter for White LED Applications November 2004 LM3557 Step-Up Converter for White LED Applications General Description The LM3557 is a complete solution for white LED drive applications. With minimal external component count, no DC current leakage paths to ground, cycle-by-cycle current limit protection, and output over-voltage protection circuitry, the LM3557 offer superior performance and cost savings over standard DC/DC boost component implementations. The LM3557 switches at a fixed-frequency of 1.25 MHz, which allows for the use of small external components. Also, the LM3557 has a wide input voltage range to take advantage of multi-cell input applications.