The LT®1763 series are micropower, low noise, low dropoutregulators. The devices are capable of supplying 500mAof output current with a dropout voltage of 300mV. Designedfor use in battery-powered systems, the low 30μAquiescent current makes them an ideal choice. Quiescentcurrent is well controlled; it does not rise in dropout as itdoes with many other regulators.A key feature of the LT1763 regulators is low output noise.With the addition of an external 0.01μF bypass capacitor,output noise drops to 20μVRMS over a 10Hz to 100kHzbandwidth. The LT1763 regulators are stable with outputcapacitors as low as 3.3μF. Small ceramic capacitors canbe used without the series resistance required by otherregulators.Internal protection circuitry includes reverse battery protection,current limiting, thermal limiting and reverse currentprotection. The parts come in fi xed output voltages of 1.5V,1.8V, 2.5V, 3V, 3.3V and 5V, and as an adjustable devicewith a 1.22V reference voltage. The LT1763 regulatorsare available in 8-lead SO and 12-lead, low profi le (4mm× 3mm × 0.75mm) DFN packages.
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