LM317AT

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LM317AT is a three terminal adjustable linear voltage regulator that offers a wide range of output voltage selections with excellent line and load regulations. It is suitable for a wide range of applications, especially those that require low voltage, high ripple current and high current capability.

The LM317AT series offers a low input voltage range of 2.5 to 40 V and total output power dissipation of up to 9.5 W. In addition, it offers a wide selection of output voltage selections ranging from 1.25 V to 36 V with maximum output current of 1.25 A. Its low quiescent current capability makes it ideal for low current, battery powered applications.

The LM317AT regulator uses an internal long-term reliability pass transistor to provide high output current capability, and provide the added benefits of improved line and load regulation. It features a wide bandwidth of ±20 mV, maximum output voltage tolerance of ±7 mV and a temperature drift of ±10 mV/°C of rated output voltage.

The LM317AT regulator can be used in a wide range of applications, including high-side and low-side regulators, DC-DC converters and low drop regulator. It is also ideal for use in high power, high current switching and linear applications.

The LM317AT regulator works using a closed-loop feedback system to ensure a stable, fixed output voltage even while the input voltage and load current changes. This type of regulator works on the principle of Negative Feedback, wherein the output voltage is compared with an internal reference voltage. If the output voltage changes, the feedback system sends a signal to the error amplifier, which adjusts the internal pass transistor to bring the output voltage back to the reference voltage.

The LM317AT regulator also offers good protection features such as short circuit protection and thermal overload protection. The integrated short-circuit protection prevents over-current from flowing through the output and the regulator, while the thermal overload protection ensures that the device does not overheat and protects it from any damage caused by excessive current.

Thus, the LM317AT regulator is an ideal solution for applications where a stable, low voltage, high current, regulated power supply is required. It is a versatile and cost-effective option, and offers excellent line and load regulation, low quiescent current and good protection features.

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