Low Dropout Regulators (LDOs) are an integral part of automotive electronics, particularly during the modern era. They are used in electronic circuits to provide a stable and precise output voltage, though, unlike regular voltage regulators, LDOs can operate with a very small difference between the input and output voltage (known as dropout voltage). This makes them crucial for powering sensors, infotainment systems, and Advanced Driver-Assistance Systems (ADAS).
Nexperia, a semiconductor company located in the Netherlands, just introduced new ultra-efficient LDOs that set new standards in the industry. The AEC-Q100 qualified low-dropout (LDO) voltage regulators combine ultra-low quiescent current (Iq), high accuracy, and robust output protection. They are specifically engineered for infotainment systems, ADAS, telematics, lighting systems, and zone controller units, and consume just 5.3 μA at light loads and an astonishingly low 300 nA in deep-sleep mode. As such, they are ideal for standby and CAN-wake systems.
Beyond energy efficiency, these high-accuracy tracking LDOs bring other advancements that suit automotive environments. Their wide input voltage range (3-40V) allows direct connection to vehicle batteries without the need for pre-regulation, ensuring seamless power delivery even in cold-crank conditions. Moreover, they provide stable voltage outputs (±2% accuracy) to prevent voltage fluctuations that could impact system performance.
Still, one of the standout features of the new AEC-Q100-qualified model family is its comprehensive output protection. Namely, these regulators can prevent electrical failures that could disrupt system functionality, while also ensuring components remain protected from voltage spikes. In addition, the AEC-Q100 regulators prevent unwanted current flow that could damage sensitive electronics in modern vehicles. Furthermore, these LDOs can operate over a -40 °C to 125 °C (ambient) and -40 °C to 150 °C (junction) temperature range. Thus, they are an excellent solution for off-board loads, including sensors and ratiometric sensing applications where precise voltage tracking is critical.
Nexperia’s AEC-Q100-qualified portfolio now includes several models. The NEX90x30-Q100 offers 300mA output in compact thermally enhanced HTSSOP (3mm x 3mm) and DFN6 (2mm x 2mm) packages. Meanwhile, the NEX90x15-Q100 is a more cost-effective 150mA solution, available in SOT23-5, SOT223-4, and HWSON6 (DFN-6) packages. Finally, the NEX91207-Q100 is a tracking LDO with 70mA output, perfect for precise voltage tracking in SOT23-5 and SOT23-5S packages.
