Maxim Integrated MAX77501 Piezo Haptic Actuator Boost Driver

Maxim Integrated MAX77501 Piezo Haptic Actuator Boost Driver


Maxim Integrated MAX77501 Piezo Haptic Actuator Boost Driver is a high-efficiency controller driver for piezo haptic actuators. The driver is optimized for driving up to 2µF piezo elements. It can generate a single-ended haptic waveform of up to 110VPK-PK amplitude from a 2.8V to 5.5V input power supply or a single-cell Li+ battery. Memory playback and haptic waveforms in real-time streaming modes are supported.


  • 110VPK-PK haptic waveforms generation
  • Optimized for up to 2µF haptic piezo actuator
  • 2.8V to 5.5V input supply range
  • 600μs start-up time to haptic playback
  • High-efficiency, low IQ extends battery life
    • 75μA standby current/1μA shutdown current
    • Maxim patented ultra-low-power boost architecture
  • 12-bit haptic waveform playback DAC
  • Real-time streaming and RAM playback modes
    • 9k FIFO buffer with FIFO ready status signal
    • 8k RAM buffer for waveforms storage
  • 25MHz SPI interface
    • SPI ready, warning and fault conditions interrupt
  • Protection features
    • Programmable cycle-by-cycle overcurrent limit, 130V overvoltage, UVLO, and thermal protection
  • Small size and low profile
    • 2.42mm x 2.02mm, 30 bump WLP

Application Circuit

About mixos

Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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