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RAA271041 - Cold Crank Boost and Buck Controller

General Description

The RAA271041 is a controller for a dual regulator system capable of supporting ASIL-D automotive systems which must operate during battery dropout conditions.

Key Features

  • ASIL-D Functional Safety.
  • 40V boost and buck integrated driver controller.
  • FET drivers support source/sink current of 2A/3A.
  • Low IQ with ECM mode of 8µA typical (buck Channel 1 only).
  • Separate or Combined Wake (Enable) inputs for each channel.
  • Minimized FET ON and OFF times (25ns and 45ns).
  • High-efficiency buck exceeding 80% at 10mA.
  • Buck frequency options 440kHz or 2.2MHz.
  • Boost frequency options 440kHz or 2.2MHz (2.2MHz Boost requires 2.2MHz Buck f.

📥 Download Datasheet

Datasheet Details

Part number RAA271041
Manufacturer Renesas
File Size 1.15 MB
Description Cold Crank Boost and Buck Controller
Datasheet download datasheet RAA271041 Datasheet

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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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RAA271041 Cold Crank Boost and Buck Controller with Drivers for ASIL-D Automotive Applications Datasheet Description The RAA271041 is a controller for a dual regulator system capable of supporting ASIL-D automotive systems which must operate during battery dropout conditions. The Channel 2 boost regulator maintains the voltage rail which supplies the downstream Channel 1 buck regulator, allowing the buck output to maintain regulation during a battery dropout event such as cold cranking. For Cold Crank applications, the Channel 2 Boost has an adjustable output and is active when the VBAT input voltage falls below a user-programmable threshold. The boost channel can also be configured as an independent boost with separate Enable (WAKE2) control.