Description The LDK120 low drop voltage regulator provides 200 mA of maximum current from an input supply voltage in the range of 1.9 V to 5.5 V， with a typical dropout voltage of 100 mV. It is stabilized with a ceramic capacitor on the output. The very low drop voltage， low quiescent current and low noise features make it suitable for low power battery-powered applications. An enable logic control function puts the LDK120 in shutdown mode allowing a total current consumption lower than 1 μA. The device also includes a short-circuit constant current limiting and thermal protection.

　　Features ? Input voltage from 1.9 to 5.5 V ? Very low dropout voltage （100 mV typ. at 100 mA load） ? Low quiescent current （max. 100 μA， 1 μA in OFF mode） ? Very low noise ? Output voltage tolerance： ± 2.0% @ 25 °C ? 200 mA guaranteed output current ? Wide range of fixed output voltages available on request： from 0.8 V to 3.5 V with 100 mV step ? Adjustable version： from 0.8 V to VIN-Vdrop ? Logic-controlled electronic shutdown ? Compatible with ceramic capacitor COUT = 1 μF ? Internal current and thermal limit ? Available in SOT23-5L， SOT323-5L and DFN6 （1.2 x 1.3 mm） packages ? Temperature range： -40 °C to 125 °C