LM317AH

Current - Output:	1.5A
Base Part Number:	LM317
Supplier Device Package:	TO-39-3
Package / Case:	TO-205AD, TO-39-3 Metal Can
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	80dB ~ 65dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	37V
Voltage - Output (Min/Fixed):	1.25V
Voltage - Input (Max):	40V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Bulk

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LM317AH is a type of linear voltage regulator. It is an adjustable three-terminal positive-voltage regulator capable of supplying in excess of 1.5A over a 1.2V to 37V output range. It has a library of standard application circuits and is typically used for computing, industrial, and consumer applications.

The LM317AH is a monolithic integrated circuit that consists of an adjustable output regulator, current limiting and thermal protection circuitry. Its output voltage is adjustable over a range of 1.2V to 37V. The LM317AH has two terminals, OUT and ADJ, which are used to adjust and control the output voltage. The third terminal is VIN which is used to connect the input voltage.

The LM317AH can be used in many applications: DC to DC converter, DC to AC inverter, switching power supply, battery charger, voltage splitter, current regulator and more.

The LM317AH works by controlling the current flow through the regulator circuit, an internal current-to-voltage converter, and the error amplifier. When voltage is applied to the regulator circuit, a reference voltage is created. This reference voltage is compared with the external reference voltage by the error amplifier. If the difference is greater than the setpoint, the error amplifier will adjust the current flow to reduce the difference.

The output current limit of LM317AH is regulated by the sense resistor. A voltage across the sense resistor is proportional to the output current. The voltage is applied to the error amplifier which will disable the output if the sensed current is too large.

The LM317AH also has a thermal protection circuit which will turn off the output when the regulator temperature exceeds the safe operating temperature. This prevents damage to the circuit and improves reliability.

Overall, the LM317AH is an ideal choice for a variety of linear voltage regulator applications. Its adjustable output voltage and current limit features make it suitable for a wide range of applications. It is also highly reliable, with a built-in thermal protection circuit to guard against damage.

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