Linear voltage regulators

ST offers one of the widest selection of fixed and adjustable linear voltage regulators. Beside a complete portfolio of Industry Standard regulators for both Positive and Negative output, we offer an ever-expanding range of High performance LDO regulators addressing all the major trends in the industry.

Among our products, you can find the optimal combination of low dropout voltage and quiescent current - for the highest efficiency design - or dynamic performances for the best transient response, ripple rejection and low noise. All this coupled with a choice of the smallest form factor  packages for size conscious applications.

Low-dropout regulators (LDO)
low dropout voltage regulator design guide

New 200 mA and 1.2A LDOs support up to 18 V input voltage

The LDK320 and LDL212 complete ST’s family of cost-effective LDOs, offering an optimal combination of low dropout voltage, low quiescent current and remarkable dynamic performance at a favorable price.

Thanks to the wide input voltage operating range, as high as 18 V, they can be used as post-regulators in consumer applications (TVs, STBs), home appliances and industrial control modules, or directly attached to medium voltage battery packs in laptops and other battery-operated equipment. The LDK320 is also available in a 0.5% high accuracy version.

Both products are available in tiny packages allowing designers to save PCB space and build smaller systems.

STLQ015 ultra-low quiescent current linear regulators

The STLQ015 ultra-low consumption LDOs provide up to 150 mA current from an input voltage ranging from 1.5 to 5.5 V. They feature a quiescent current of just 1.4 μA at the maximum load and a standby current of typically 1 nA, extending the battery lifetime in those applications requiring very long standby time. Requiring only two small external capacitors, they provide a cost-effective and space-saving solution for powering microcontrollers in portable and battery-powered systems, electronic sensors, home medical instruments and portable entertainment gadgets. The STLQ015 LDOs are available in a wide range of output voltages, from 0.8 V to 3.3 V in 100 mV steps.