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I have a custom board that is driven with an MSP4302553 chip and can drive a Piezo Transducer which resonates at 25khz. I am limited to using a single rechargeable Lithium battery which is 3.3v. In order to get the 117dB that I want out of the Piezo Transducer, I need to generate a square wave with a 25khz frequency and 10volts across the 2 Piezo pins. I found a Push Pull library which allows me to get a -3.3v-3.3v range, or a total of 6.6v across the 2 pins on my Piezo. This gives me about 80dB. I need to boost that voltage by just a little bit after the PWM pins, without losing the 25khz frequency that I'm sending to the Piezo. Does anybody have any ideas for doing this? I'm on a tight budget and want to keep my board as tiny as possible with the fewest components possible. Thanks, Curtis