Power Electronics / Power Management


Linear regulator power supply IC

30 November 2005 Power Electronics / Power Management

Maxim's MAX8761, a complete linear-regulator power-supply solution for thin-film transistor (TFT) LCD panels used in monitors and TVs, is highly integrated to save cost and space. The device includes a high-performance linear regulator, a positive and a negative charge-pump regulator, built-in power-up sequence control, and a high-current operational amplifier. Additionally, the MAX8761 provides logic-controlled high-voltage switches to control the positive charge-pump output. The device's linear regulator directly steps down the input voltage to generate the supply voltage for the source-driver ICs. Output accuracy is 1,6% with a fast transient response. The two built-in charge-pump regulators generate the TFT gate-on and gate-off supplies. The operational amplifier features high-output current (150 mA), fast slew rate (12 V/μs), and wide bandwidth (12 MHz). It is available in a 24-pin thin QFN package.



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