Linear & Low-Dropout (LDO) Regulators

Yes, the LM317 is a classic adjustable linear voltage regulator originally developed by National Semiconductor. It provides an output voltage range of approximately 1.25V to 37V, set by two external resistors. It is widely used in lab power supplies, battery chargers, and general-purpose DC rail regulation. The LM317 is available through LEVEL SOLUTIONS in commercial and Mil-spec grades.

The IC 7812 is a member of the popular 78xx three-terminal fixed positive voltage regulator series, providing a fixed +12V regulated output. It requires minimal external components and is widely used in power supplies for industrial equipment, consumer electronics, and embedded boards. Motorola, Fairchild, and National Semiconductor all produce 78xx-series regulators available through LEVEL SOLUTIONS.

The IC 723 is a general-purpose linear voltage regulator IC capable of both positive and negative output voltages, adjustable from approximately 2V to 37V. It offers excellent line and load regulation with current limiting capability. It is commonly used in precision bench power supplies and industrial voltage regulators. Multiple manufacturers produce the 723, with stock available through LEVEL SOLUTIONS.

A standard linear regulator requires a minimum input-to-output voltage differential (dropout voltage) typically above 2V, while a Low-Dropout (LDO) regulator operates with a much smaller differential — often below 300mV. LDOs are preferred in battery-powered and low-headroom applications such as portable devices, automotive electronics, and MCU power rails where efficiency and minimal input voltage are critical.

Yes. LEVEL SOLUTIONS stocks and sources linear and LDO regulator ICs in military-specification grades from manufacturers including Motorola, Harris Semiconductor, Microsemi, and Fairchild Semiconductor. Mil-spec parts are tested to stricter tolerance and reliability standards, making them suitable for aerospace, defense, and satellite applications requiring high-reliability power management solutions.

Linear and LDO regulators serve a broad range of industries, including consumer and commercial electronics, industrial automation and embedded systems, automotive electronics, aerospace and defense, computing and processor platforms, and telecommunications. Applications span fixed power rails, battery-powered devices, microprocessor core voltage supplies, and radiation-hardened aerospace power conditioning systems.