Description
The LD59030 high accuracy voltage regulator provides 300 mA of maximum current
from an input voltage ranging from 1.5 V to 5.5 V, with a typical dropout voltage of
135 mV at VOUT = 3.3 V.
It is available in DFN4 1x1 package, allowing the maximum space saving.
The device works with a ceramic capacitor on the output. The ultra-low drop voltage,
low quiescent current and low noise features, together with the internal soft-start
circuit and output current fold-back protection, make the LD59030 suitable for low
power battery-operated applications.
An enable logic control function puts the LD59030 in shutdown mode allowing a total
current consumption lower than 0.03 µA.

Features
• Input voltage from 1.5 to 5.5 V
• Ultra low dropout voltage (135 mV typ. at 300 mA load)
• Very low quiescent current (28 µA typ. at no load, 0.03 µA typ. in off mode)
• Internal current fold-back
• Output voltage tolerance: ± 1 % @ 25 °C
• 300 mA guaranteed output current
• High PSRR: 75 dB@1 kHz
• Wide range of output voltages available on request: from 0.8 V up to 5.0 V in 50
mV step
• Logic-controlled electronic shutdown
• Internal soft-start
• Optional output voltage discharge feature
• Compatible with ceramic capacitor COUT = 0.47 µF
• Thermal protection
• Available in DFN4 1x1
• Operating temperature range: -40 °C to 125 °C