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.

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
Applications
Mobile phones
Personal digital assistants (PDAs)
Cordless phones and similar battery-powered systems
Digital still cameras