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Introduction The ft6203 family is 1.25W mono fully differential audio power amplifier designed for driving a speaker of 8Ω impedance or above with optimized PCB area consumption. The ft6203 can operate from 2.5V to 5.5V, drawing only 1.9mA of quiescent supply current. Available packages include 2mm x 2mm WCSP, 3mm x 3mm DFN, and 3mm x 4.8mm MSOP packages. The ft6203 provides multiple features including 85dB PSRR from 90Hz to 5Kz, improved RF-rectification immunity and the optimized PCB consumption which altogether build up an ideal solution for mobile phones, PDAs or other handheld devices. Features ♦ 1.25W into 8Ω from a 5-V supply at 1% THD (Typical) ♦ Supply current: 1.9mA (typical) ♦ Shutdown Pin has 1.8V Compatible Thresholds ♦ Shutdown current: less than 0.1uA ♦ PSSR: 90dB ♦ Wide supply voltage: 2.5V to 5.5V ♦ Fully differential design to reduce RF rectification ♦ Improved CMRR design to save the cost of two input coupling capacitors ♦ Packages: – ft6203W in 2mm x 2mm WCSP package – ft6203D in 3mm x 3mm DFN package – ft6203M in 3mm x 4.8mm MSOP package Applications ♦ Mobile Phones ♦ PDAs ♦ Portable electronic device