LM140LAH-15

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Linear voltage regulators are used to regulate the output voltage of power supplies. The LM140LAH-15 is a linear voltage regulator specifically designed for a wide range of applications, especially when space and cost are considerations. In this article, we will look at the application field and working principle of the LM140LAH-15.

The LM140LAH-15 is designed for a wide range of applications, from microprocessors and memory in digital systems to audio and communications products. The adjustable version of the LM140LAH-15 is capable of providing regulated output voltages up to 15V, and adjustable from 1.2V to 15V with an external voltage divider. The fixed version is available in 3V, 5V, 8V, 10V, 12V and 15V versions. The LM140LAH-15 is capable of supplying up to 100mA of current.

The LM140LAH-15 is a 3-terminal adjustable linear voltage regulator. It has two input pins, the Output Voltage pin and the Adjust pin, and one output pin, the Input Voltage pin. The Input Voltage pin is connected to the power source and the Output Voltage pin is connected to the load. The Adjust pin is connected to a voltage divider that is used to set the output voltage. Internally, the LM140LAH-15 incorporates an element of negative feedback to ensure the voltage regulation.

When the voltage on the Input Voltage pin is greater than the reference voltage on the Adjust pin, the LM140LAH-15 will begin to reduce the output voltage, trying to make it equal to the reference voltage on the Adjust pin. When the voltage on the Input Voltage pin is lower than the reference voltage on the Adjust pin, the LM140LAH-15 will begin to increase the output voltage, trying to make it equal to the reference voltage on the Adjust pin.

The LM140LAH-15 is a low-dropout device, meaning that the output voltage can be adjusted to be just a few millivolts different from the input voltage. This makes it ideal for applications with noisy input lines, where the output voltage needs to be tightly regulated. The LM140LAH-15 also has a low quiescent current and low supply current, making it ideal for battery-powered applications.

The LM140LAH-15 also has built-in thermal protection. When the voltage on the Input Voltage pin is too high, the LM140LAH-15 will shut down, protecting the device from overheating. This thermal protection feature makes the LM140LAH-15 ideal for applications that require robust thermal performance.

In summary, the LM140LAH-15 is a low-dropout linear voltage regulator, designed for a wide range of applications such as microprocessors and memory in digital systems to audio and communications products. It has an adjustable output voltage range of 1.2V to 15V, and a fixed output voltage range of 3V to 15V, and is capable of supplying up to 100mA of current. It also has a low quiescent current and low supply current, and incorporates thermal protection. The LM140LAH-15 makes an ideal choice for applications requiring robust thermal performance and tightly regulated output voltages.

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