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02-14-2017

Tiny LDOs from STMicroelectronics Deliver Class-Leading Quiet Power for Precision Sensing

STMicroelectronics » LDLN025

STMicroelectronicsLDLN025 Low-Dropout (LDO) voltage regulators deliver best-in-class noise performance in relation to output current and footprint, generating less than 6.5 µVrms noise at 250 mA full load with an outline of just 0.63 mm × 0.63 mm.

STMicroelectronics - LDLN025

To ensure high accuracy and sensitivity the LDLN025 is designed to supply ultra-smooth and stable voltage to precision ICs like ADCs, VCOs, or sensors. With the advantage of its small footprint, it enables space-constrained products like smartphones, smart watches, fitness monitors, medical sensors, and wireless IoT devices to support new and better functions.

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

The LDLN025 operates with an input voltage from 1.5 V to 5.5 V, with typical dropout of 120 mV. A selection of fixed output voltages from 1.2 V to 5.0 V is available.

In addition to the 0.63 mm × 0.63 mm Flip-Chip 4-bump package, the LDLN025 is available in a 1 mm × 1 mm 4-lead QFN. A 2.95 mm × 1.6 mm SOT23-5L package option is in development. Budgetary pricing is $0.15 for orders of 1000 pieces. Samples and selected output-voltage options can be ordered immediately, with additional voltages available soon.

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