14VP-P, Class G Ceramic Speaker Driver

Class G, CeraMax Technology Drives Ceramic Speakers in the Smallest Footprint

Please check latest availability status for a specific part variant.


The MAX9788 features a mono Class G power amplifier with an integrated inverting charge-pump power supply specifically designed to drive the high capacitance of a ceramic loudspeaker. The charge pump can supply greater than 700mA of peak output current at 5.5VDC, guaranteeing an output of 14VP-P.

The MAX9788 maximizes battery life by offering high-performance efficiency. Maxim's proprietary Class G output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers.

The MAX9788 is ideally suited to deliver the high output-voltage swing required to drive ceramic/piezoelectric speakers.

The device utilizes fully differential inputs and outputs, comprehensive click-and-pop suppression, shutdown control, and soft-start circuitry. The MAX9788 is fully specified over the -40°C to +85°C extended temperature range and is available in small lead-free 28-pin TQFN (4mm x 4mm) or 20-bump WLP (2mm x 2.5mm) packages.
MAX9788: Simplified Block Diagram MAX9788: Simplified Block Diagram Enlarge+

Key Features

  • Integrated Charge-Pump Power Supply—No Inductor Required
  • 14VP-P Voltage Swing into Piezoelectric Speaker
  • 2.7V to 5.5V Single-Supply Operation
  • Clickless/Popless Operation
  • Small Thermally Efficient Packages
    • 4mm x 4mm 28-Pin TQFN
    • 2mm x 2.5mm 20-Bump WLP


  • Cellular Phones
  • Handheld Gaming Consoles
  • MP3 Players
  • Notebook Computers
  • Personal Media Players
  • Smartphones

See parametric specs for Speaker Amplifiers (36)

Part NumberClassSpkr. Amp. VCC
Spkr. Amp. VCC
Spkr. Amp. ICC
POUT into 8Ω @ 1% THD+N
POUT into 8Ω @ 10% THD+N
Spkr. Amp. Half Pwr. THD+N
minmaxtypminminA- WeightedminSee Notes
MAX9788 Boosted/G2.75.582.42.80.0710877
UCSP (B)/20
$1.13 @1k

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.

MAX9788EVKIT: Evaluation Kit for the MAX9788
Product Reliability Reports: MAX9788.pdf 
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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Environmental Management System >


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