RAA271041 Overview
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...
RAA271041 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
- Minimized FET ON and OFF times (25ns
- High-efficiency buck exceeding 80% at 10mA
- Buck frequency options 440kHz or 2.2MHz
- Boost frequency options 440kHz or 2.2MHz
- VBATS sense for Boost Enable during Cold Crank
- Optional pseudo-random spread spectrum clocking