STMicroelectronics | LD39050PU33R

The LD39050PU33R 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 noload, 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