MAX9730

19-0701; Rev 1; 11/07 KIT ATION EVALU E L B AVAILA 2.4W, Single-Supply, Class G Power Amplifier General Description The MAX9730 features a mono Class G power amplifier with an integrated inverting charge-pump power supply. The charge pump can supply up to 500mA of peak output current over a 2.7VDC to 5.5VDC supply voltage range, guaranteeing up to 2.4W output power into an 8Ω load. The 2.4W output power allows for transient audio content to remain unclipped as the battery rail collapses over time. The MAX9730 maximizes battery life by offering highperformance efficiency. Maxim’s proprietary output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers. High efficiency allows the MAX9730 to be packaged in a UCSP™ package without derating the output power handling capability. The device utilizes fully differential inputs and outputs, comprehensive click-and-pop suppression, shutdown control, and soft-start circuitry. The MAX9730 is fully specified over the -40°C to +85°C extended temperature range and is available in ultra-small, lead-free, 20-bump UCSP (2mm x 2.5mm) and 28-pin TQFN (4mm x 4mm) packages. o 2.7V to 5.5V Operation o Integrated Charge-Pump Power Supply o 63% Efficiency (VCC = 5V, POUT = 1W) o 2.4W Output Power into 8Ω at VCC = 3.3V o Up to 2.4W Instantaneous Output Power into 8Ω o Clickless/Popless Operation o Small Thermally Efficient Packages 2mm x 2.5mm 20-Bump UCSP 4mm x 4mm 28-Pin...