TL317CDG4

Voltage Dropout (Max):	--
Base Part Number:	TL317
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	65dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	32V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	38V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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TL317CDG4 Application Field and Working Principle

PMIC - Voltage Regulators - Linear encompasses several variations of voltage regulators, including the TL317CDG4.The TL317CDG4 is a precision, three-terminal adjustable regulator featuring adjustable current limit and thermal shutdown protection with the output current limited to 1.5 amps. TL317CDG4 is a linear voltage regulater which provides an adjustable output voltage from 1.2 V to 37 V with guaranteed output current up to 1.5 A. It features an internally trimmed bandgap reference to assure output accuracy and temperature stability.The nominal input voltage range is 5.0 V to 40 V, while the maximum input voltage limit is 18 V. It incorporates an adjustable current limit and thermal shutdown protection. It also has a current limiting feature that limits the output current to a safe value, preventing excessive power dissipation.The TL317CDG4 can be used in a variety of applications to ensure a steady and reliable output voltage. These applications include:1. Local on-card regulation,2. Multiple output power supplies,3. Positive to negative voltage conversion,4. General purpose regulator.The TL317CDG4 operates as an adjustable voltage regulator with an output voltage proportional to a voltage applied at the adjustment terminal. It also incorporates a built-in power-on reset and soft-start functions for circuit protection. The TL317CDG4 consists of three terminals: the input, output, and adjustment. The input voltage is simply the voltage that is powering the circuit, while the output is the desired regulated voltage.The current limit is achieved through the use of a power transistor that is sized to the output current limit. This transistor acts as a current interrupt when the output current exceeds the preset limit. When the current limit is reached, the power transistor will begin to reduce the current flowing through the output. This, in turn, reduces the voltage drop across the output, and the output voltage rises again until the limit is reached and the process continues.The TL317CDG4 also includes an adjustable thermal shutdown protection circuit. This circuit monitors the chip temperature and, when a certain temperature threshold is exceeded, it shuts down the output by turning off the power transistor. Once the chip temperature drops, the power transistor will turn on again, and the output voltage will be set to the original value.The TL317CDG4 is ideal for applications where long-term voltage and current stability are required, such as for powering critical microprocessors. Its low-voltage capability also makes it ideal for low-voltage circuits and applications. With its adjustable current limit and thermal protection, the TL317CDG4 is an efficient and reliable voltage regulator.

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