Catalyst Semiconductor announced two additions to its low dropout (LDO) regulator product line. The CAT6217 and CAT6218 LDO regulators source 150 mA and 300 mA output currents, respectively, in a five-lead, 1 mm profile thin SOT-23 package. The regulators offer a low quiescent current combined with a low typical dropout voltage of 90mV at a 150 mA load for the CAT6217 and 180 mV at a 300 mA load for the CAT6218. Additionally, an external bypass capacitor reduces overall output noise. These products are designed with a “quick start” feature to ensure a fast turn-on time of less than 150 µs. The CAT6217 and CAT6218 eliminate battery drain when not in use by entering a “zero” current shutdown mode. They also offer a low typical quiescent current of 55 µA and protection against short-circuit and thermal overload fault conditions. The CAT6217 is available in output voltages of 1.5V, 1.8V, 2.5V, 2.8V, 2.85V and 3.3V. The CAT6218 offers output voltages of 1.8V, 2.4V, 2.7V, 2.85V, 3.0V, 3.2V and 3.3V.