60V Bidirectional 4-Switch Synchronous Buck-Boost Controller


  • Buck-Boost Controller steps voltage up or down with only one Inductor
  • On-the-fly Operation Dynamically Controls Voltage and Current Flow in two directions
  • Proprietary Algorithm enables clean Buck-Boost Transitions
  • Wide Input Voltage Range: 4.5 V to 60 V

The ISL81601 by Renesas is a "UPS on a chip": a bi-directional buck-boost controller that can both charge a battery and when the input power is lost, direct the battery power to a load. The ISL81601 automatically steps voltage up or down, always supplying the target load voltage, even when the input varies above and below that target. With current sense amplifiers on both input and output, the ISL81601 protects against faults, regardless of the direction of power flow. The ISL81601 has a wide input range of 4.5 V to 60 V and is perfect for industrial battery systems up to 48 V.

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  • Wide Output Voltage Range: 0.8 V to 60 V 
  • Supports Pre-biased Output with Synchronous Rectifier Soft-Start
  • Programmable Frequency: 100 kHz to 600 kHz
  • Supports Parallel Operation Current Sharing with Cascade Phase Interleaving
  • External Sync with Clock Out or Frequency Dithering
  • External Bias for Higher Efficiency Supports 8 V to 36 V Input
  • Output and Input Current Monitor
  • Selectable PWM Mode Operation between PWM/DE/Burst Modes
  • Accurate EN/UVLO and PGOOD Indicator
  • Low Shutdown Current: 2.7 µa
  • Complete Protection: OCP, SCP, OVP, OTP, and UVP
    • Dual-Level OCP Protection with Average Current and Pulse-By-Pulse Peak Current Limit
    • Selectable OCP Response with Either Hiccup or Constant Current Mode
    • Negative Pulse-by-Pulse Peak Current Limit
  • Battery - Solar Systems
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