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MAX9738
16VP-P Class G Amplifier with Inverting Boost Converter

Industry's Smallest Inductor-Based Boost Solution to Drive Ceramic Speakers
from a Li-Ion Battery


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Description
The MAX9738 features a mono Class G power amplifier with an integrated inverting boost converter. The Class G amplifier is specifically designed to drive the high capacitance of a ceramic/piezoelectric loud-speaker. The inverting boost converter can typically supply up to 400mA of peak output current, allowing for a constant output of 16VP-P over the 2.7V to 5.5V supply voltage range.

The MAX9738 maximizes battery life by offering high-performance efficiency. Maxim’s proprietary output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers.

The MAX9738 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 MAX9738 is fully specified over the -40°C to +85°C extended temperature range and is available in an ultra-small, lead-free 5x4 WLP (2.5mm x 2mm) package.

Key Features   Applications/Uses
  • Integrated Inverting Boost Converter
  • 2.7V to 5.5V Single-Supply Operation
  • 16VP-P Output Voltage Swing, Ideal for Driving a Ceramic Speaker
  • Maintains Output Voltage Swing as the Battery Decays
  • Clickless/Popless Operation
  • Small, Thermally Efficient 5x4 WLP Package (2.5mm x 2mm)

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

    Application Notes
  • Application Note 4164: Amplifier Considerations in Ceramic Speaker Applications - MAX9738

    Evaluation Kits
    none

    Design Guides
  • AUDIO (PDF)

    Reliability Reports
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    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    MAX9738 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX9738EVKIT+  



    See data sheet
    MAX9738EWP+T  
    WLP;18 pin;
    Dwg: 21-0059A (PDF)
    Use pkgcode/variation: W202A2+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9738EWP+  
    WLP;18 pin;
    Dwg: 21-0059A (PDF)
    Use pkgcode/variation: W202A2+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX9738EWP+TG45  
    WLP;18 pin;
    Dwg: 21-0059A (PDF)
    Use pkgcode/variation: W202A2+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

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     Description 
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    Document Ref.: 19-3700; Rev 0; 2008-04-03
    This page last modified: 2008-04-03




             



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