Description
The LD39050 provides 500 mA maximum current from an input voltage ranging from 1.5 V to 5.5 V with a typical dropout voltage of 200 mV. Stability is provided using ceramic capacitors. The ultra low drop-voltage, low quiescent current and low noise features make it suitable for low power battery-powered applications. Power supply rejection is 65 dB at low frequencies and starts to roll off at 10 kHz. An Enable logic control function puts the LD39050 in shut-down mode allowing a total current consumption lower than 1 µA. The device also includes short-circuit constant current limiting and thermal protection. Typical applications are mobile phones, personal digital assistants (PDAs), cordless phones and similar battery-powered systems.

FEATUREs
■ Input voltage from 1.5 to 5.5 V
■ Ultra low dropout voltage (200 mV typ. at 500
   mA load)
■ Very low quiescent current (20 µA typ. at no
   load, 100 µA typ. at 500 mA load, 1 µA max in
   off mode)
■ Very low noise without bypass capacitor
■ Output voltage tolerance: ± 2.0 % @ 25 °C
■ 500 mA guaranteed output current
■ Wide range of output voltages available on
   request: 0.8 V to 4.5 V with 100 mV step and
   ADJ from 0.8 V
■ Logic-controlled electronic shutdown
■ Compatible with ceramic capacitor
   COUT = 1 µF
■ Internal current and thermal limit
■ Package DFN6 (3 x 3 mm)
■ Temperature range: -40 °C to 125 °C