With an ultra-compact size of 0.63 x 0.63mm, it is suitable for space-constrained products.
Designed to supply a stable voltage to precision ICs

STMicroelectronics (hereinafter ST) has released the LDLN025, a Low-Dropout (LDO) voltage regulator that provides best-in-class noise performance relative to output current and footprint.

ST stated that the LDLN025 measures 0.63 x 0.63 mm and is designed to provide a constant, stable voltage to precision ICs such as ADCs, VCOs, and sensors to ensure high accuracy and sensitivity, with noise at a full 250 mA load being less than 6.5 µVrms. Additionally, it is designed with a small footprint, making it suitable for space-constrained products such as smartphones, smartwatches, fitness monitors, medical sensors, and wireless IoT (Internet of Things) devices.



The LDLN025 provides low-noise operation and excellent PSRR (Power Supply Rejection Ratio) performance of 80dB at 120MHz. In addition, it can operate without an output filter and can be stabilized with two small ceramic capacitors, which simplifies the design and reduces Bill of Materials (BoM) costs and board space.

Since the quiescent current is 12µA when no load and only 0.2µA in shutdown mode controlled by an external enable pin, overall power consumption can be minimized and battery life in portable applications can be extended.

The LDLN025 operates at an input voltage of 1.5V to 5.5V, and the dropout voltage is typically 120mV. The fixed output voltage can be selected from 1.2V to 5.0V.