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LM2642 - Two-Phase Synchronous Step-Down Switching Controller

General Description

The LM2642 consists of two current mode synchronous buck regulator controllers with a switching frequency of 300kHz.

The two switching regulator controllers operate 180° out of phase.

This feature reduces the input ripple RMS current, thereby significantly reducing the required input capacitance.

Key Features

  • 1.
  • 2 Two Synchronous Buck Regulators.
  • 180° Out of Phase Operation.
  • 4.5V to 30V Input Range.
  • Power Good Function Monitors Ch.1.
  • 37µA Shutdown Current.
  • 0.04% (typical) Line and Load Regulation Error.
  • Current Mode Control With or Without a Sense Resistor.
  • Independent Enable/Soft-start Pins Allow Simple Sequential Startup Configuration.
  • Configurable for Single Output Parallel Operation. (See Figure 3).
  • Adjusta.

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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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LM2642 www.ti.com SNVS203I – MAY 2002 – REVISED APRIL 2013 LM2642 Two-Phase Synchronous Step-Down Switching Controller Check for Samples: LM2642 FEATURES 1 •2 Two Synchronous Buck Regulators • 180° Out of Phase Operation • 4.5V to 30V Input Range • Power Good Function Monitors Ch.1 • 37µA Shutdown Current • 0.04% (typical) Line and Load Regulation Error • Current Mode Control With or Without a Sense Resistor • Independent Enable/Soft-start Pins Allow Simple Sequential Startup Configuration. • Configurable for Single Output Parallel Operation. (See Figure 3).