MAX9730

The MAX9730 maximizes battery life by offering highperformance efficiency. 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 WLP (2mm x 2.5mm)and 28-pin TQFN (4mm x 4mm)packages. The MAX9730 features a mono Class G power amplifier with an integrated inverting charge-pump power supply. The 2.4W output power allows for transient audio content to remain unclipped as the battery rail collapses over time. Maxim's proprietary output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers. The MAX9730 utilizes fully differential inputs and outputs, comprehensive click-and-pop suppression, shutdown control, and soft-start circuitry. 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 8 load. High efficiency allows the MAX9730 to be packaged in a WLP package without derating the output power handling capability.

The features of MAX9730 can be summarized as (1)2.7V to 5.5V operation; (2)integrated charge-pump power supply; (3)63% efficiency (VCC = 5V, POUT = 1W); (4)2.4W output power into 8 at VCC = 5V; (5)clickless/popless operation; (6)small thermally efficient packages 2mm x 2.5mm 20-bump WLP / 4mm x 4mm 28-pin TQFN.

The absolute maximum ratings of MAX9730 are (1)VCC, CPVDD: -0.3V to +6V; (2)PVSS, SVSS: -6V to +0.3V; (3)CPGND: -0.3V to +0.3V; (4)OUT+, OUT-: (SVS- 0.3V)to (VCC + 0.3V); (5)IN+, IN-, FB+, FB-: -0.3V to (VCC + 0.3V); (6)C1N: (PVS- 0.3V)to (CPGND + 0.3V); (7)C1P: (CPGND - 0.3V)to (CPVDD + 0.3V); (8)FS, SHDN: -0.3V to (VCC + 0.3V); (9)continuous current into/out of OUT+, OUT-, VCC, GND, SVSS: 800mA / CPVDD, CPGND, C1P, C1N, PVSS: 800mA / any other pin: 20mA; (10)continuous power dissipation (TA = +70°C)20-bump WLP (derate 10.3mW/°C above +70°C): 827mW / 28-pin TQFN (derate 20.8mW/°C above +70°C): 1667mW; (11)operating temperature range: -40°C to +85°C; (12)storage temperature range: -65°C to +150°C; (13)lead temperature (soldering, 10s): +300°C; (14)bump temperature (soldering)reflow: +260°C.