Description
The LD56100 high accuracy voltage regulator provides 1 A of current from an input
voltage ranging from 1.8 V to 5.5 V, with a typical dropout voltage of 120 mV.
It is available in DFN8 (1.2 x 1.6 mm) package, allowing the maximum space saving.
The device is stabilized with a ceramic capacitor on the output. The ultra-low drop
voltage, low quiescent current and fast transient response, together with the internal
soft-start circuit, make the LD56100 suitable for low power battery-operated
applications.
An enable logic control function puts the LD56100 in shutdown mode allowing a total
current consumption lower than 0.1 µA. Short-circuit protection with current limit
foldback and thermal protection are also included.

Features
• Input voltage from 1.8 to 5.5 V
• Ultra-low dropout voltage (120 mV typ. at 1 A load and VOUT = 3.3 V)
• Very low quiescent current (100 µA typ. at no-load, 0.03 µA typ. in off mode)
• Output voltage tolerance: ± 1% from -40 °C to +85 °C
• Ultra-low Noise: 13 µV RMS Noise from 10 Hz to 100 kHz at VOUT = 3.0 V
• High PSRR (70 dB@1 kHz)
• Wide range of output voltages available on request: from 1.0 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 = 1 µF
• Internal current limit foldback and thermal protections
• Available in DFN8 (1.2 x 1.6 mm)
• Operating temperature range: -40 °C to 125 °C

Applications
• Mobile phones
• Tablets
• Battery-powered systems
• Camera supply