LD56100 Ultralow Noise Linear Regulator STMicroelectronics LD56100 Ultralow Noise Linear Regulator provides 1A of current from a 1.8V to 5.5V input voltage range with a typical dropout voltage of 120mV. The LD56100 is housed in a DFN8 (1.2mm x 1.6mm) package, allowing maximum space saving. The device is stabilized with a ceramic capacitor on the output. STMicroelectronics LD56100 Ultralow Noise Linear Regulator is suitable for low-power battery-operated applications with features like an ultralow drop voltage, low quiescent current, fast transient response, and internal soft-start circuit.