LDO regulators deliver 6.5μVrms noise

Article By : STMicroelectronics

The LDLN025 combines low-noise operations with a high PSRR of 80dB at 120Hz.

STMicroelectronics’LDLN025 Low-Dropout (LDO) voltage regulators deliver noise control in relation to output, generates less than 6.5µVrms noise at 250mA full load with an outline of just 0.63mm x 0.63mm Flip-Chip 4-bump footprint.

To ensure accuracy and sensitivity, the LDLN025 is designed to supply voltage to precision ICs like ADCs, VCOs or sensors. With small footprint advantage, it enables space-constrained products like smartphones, smart watches, fitness monitors, medical sensors and wireless IoT devices to support updates and upgrades.

The LDLN025 combines low-noise operations with a high PSRR of 80dB at 120Hz. It can operate with no output filter—stable with only two small ceramic capacitors that simplify design and effect costs and board real estate. Quiescent current of just 12µA at no load, and 0.2µA in shutdown mode controlled by an external Enable pin, minimise overall power consumption and help prolong battery life in portable applications.

The LDLN025 operates with an input voltage from 1.5V to 5.5V, with typical dropout of 120mV; and has a selection of fixed output voltages from 1.2V to 5.0V.