MAX77501

110VPK-PK High-Efficiency Piezo Haptic Actuator Boost Driver

Lowest Power Piezo Haptic Actuator Driver


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Description

The MAX77501 is a high-efficiency controller driver for piezo haptic actuators and 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 real-time streaming modes are supported.

A 25MHz SPI interface provides full system access and control, including fault reporting and monitoring. This allows for a rapid 600µs playback start-up time from shutdown. The on-board memory can be dynamically allocated as multiple waveforms storage or as a FIFO buffer. The IC also implements an ultra-low power boost architecture providing the lowest power consumption solution for a haptic actuator driver.

Built-in undervoltage lockout (UVLO), cycle-by-cycle overcurrent limit, overvoltage and thermal shutdown protections ensure safe operation under abnormal operating conditions.

The MAX77501 is available in a 30-bump, 0.4mm pitch, wafer-level package (WLP).

Design Solution: Piezo Haptic Driver Extends Portables’ Battery Life ›

MAX77501: Simplified Application Circuit MAX77501: Simplified Application Circuit Enlarge+

Key Features

  • 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 Protections
  • Small Size and Low Profile
    • 2.45mm x 2.05mm, 30 Bump WLP

Applications/Uses

  • Smartphones, Tablets/E-readers, Game Consoles
  • Keyboard, Mice, Remote Controls, and Peripherals
  • Haptic/Tactile Feedback Enabled Equipment

See parametric specs for Step-Up Switching Regulators (101)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Switch TypeOper. Freq.
(kHz)
FeaturesPackage/Pins
minmaxminmax
MAX77501 2.85.51100External1000
Current Limit
Fixed Freq./PWM
Output OVP
Output UVP
WLP/30

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX77501EVKIT: Evaluation Kit for the MAX77501
Request Reliability Report for: MAX77501 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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