Intersil – ISL78227/29: Multi-Phase 55V Synchronous Boost Controllers Simplify Automotive Power System Design

Power Regulation, Conversion and Management

The ISL78227/9 is an automotive grade (AEC-Q100 Grade 1), 2-phase 55V synchronous boost controller family intended to simplify the design of high power boost applications. It integrates strong half bridge drivers, an analog/digital tracking input, and comprehensive protection functions. The ISL78229
also features a PMBusTM interface for added control and telemetry. ISL78227/9 enables a simple, modular design for systems requiring power and thermal scalability. It offers peak-current mode control for fast line response and simple compensation.


  • 5V to 55V input/output voltage range, withstands 60V transients
  • Peak current mode control with adjustable slope compensation
  • Integrated 5V 2A sourcing/3A sinking N-channel MOSFET drivers
  • External synchronization
  • Programmable adaptive dead time control
  • Supports synchronous or standard boost topology
  • Secondary average current control loop
  • 50kHz to 1.1MHz per phase switching frequency
  • Programmable minimum duty cycle
  • AEC-Q100 Grade 1 qualified: -40°C to +125°C