ISL81801FVEZ-T7A, DC/DC Controller, Synchronous Buck-Boost, 4.5 V to 80 V Supply, 1 Output, 575 kHz, HTSSOP-38

True bidirectional 4-switch synchronous buck-boost controller with peak and average current sensing and monitoring at both ends. Its wide input and output voltage ranges make it suitable for industrial, telecommunication, after-market automotive, battery back-up, UPS/storage systems, battery powered industrial applications, renewable energy, redundant power supplies, robot and drones, medical equipment, building/industrial automation and security surveillance applications. The ISL81801 uses the proprietary buck-boost control algorithm with valley current modulation for boost mode and peak current modulation for buck mode control. It has four independent control loops for input and output voltages and currents. Inherent peak current sensing at both ends and cycle-by-cycle current limit of this family of products ensures high operational reliability by providing instant current limit in fast transient conditions at either ends and in both directions.

• On-the-fly bidirectional operation with independent control of voltage and current on both ends
• Proprietary algorithm for smoothest mode transition
• MOSFET drivers with adaptive shoot through protection
• Wide input voltage range from 4.5V to 80V
• Wide output voltage range from 0.8V to 80V
• Supports pre-biased output with SR soft-start
• Programmable frequency range from 100KHz to 600KHz
• Supports parallel operation current sharing with cascade phase interleaving
• Output and input current monitor
• Selectable PWM mode operation between PWM/DE/burst modes