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RAA271041 - Cold Crank Boost and Buck Controller

Datasheet Summary

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.

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.

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Datasheet preview – RAA271041

Datasheet Details

Part number RAA271041
Manufacturer Renesas
File Size 1.15 MB
Description Cold Crank Boost and Buck Controller
Datasheet download datasheet RAA271041 Datasheet
Additional preview pages of the RAA271041 datasheet.

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Full PDF Text Transcription

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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.
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