TL317CDRE4

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:	Tape & Reel (TR)

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Introduction

TL317CDRE4 is a Linear Voltage Regulator from Texas Instruments, with a wide variety of applications. It is a versatile device, suitable for applications like low dropout and low noise power supplies, voltage scaling, voltage referencing, and other types of voltage regulation in consumer and industrial applications.

Features

The TL317CDRE4 is a low dropout regulator featuring simultaneous tracking of multiple output voltages. It has an adjustable voltage output range of 0.88V to 26V and a rated output current of 200mA. It is capable of providing simultaneous tracking and regulation of multiple supply voltage levels while featuring a low dropout voltage at a maximum load current of 200mA.Other features include low noise operation, 3.0V to 26.5V input voltage range, and a high Power Supply Rejection Ratio (PSRR) of 62dB. The device also features short circuit protection and over temperature protection.

TL317CDRE4 Application Field

The TL317CDRE4 can be used in a wide range of applications such as:• Low-input voltage portable devices• Automotive• Industrial• Medical• Networking• Renewables• Security • Telecommunications• Portable Computing• Flat Panel Displays• Digital TVsThe device is suitable for applications like converting a battery voltage to an adjustable level, powering audio circuits from variable DC sources, providing regulated output from non-regulated AC input sources, and low power supplies for instrumentation equipment, such as data loggers.

Working Principle

The TL317CDRE4 is a linear regulator, meaning it regulates the output voltage using a fixed ratio between input and output voltage, as determined by an external resistor divider circuit. In basic linear regulators, a pass transistor reduces the input voltage to match the desired output voltage. The TL317CDRE4 has the additional capability of tracking multiple output voltage levels. This is accomplished by configuring an external set of resistors to serve as voltage dividers connected to the IC’s tracking inputs.The device also features a low dropout voltage, providing a low resistance path to ground when the input voltage is close to the desired output voltage. This feature minimizes the power loss through the device, resulting in improved efficiency and longer battery life.Finally, the device also has high PSRR, meaning it has high immunity to noise on the input voltage. This results in improved system performance, especially in battery-powered applications.

Conclusion

The TL317CDRE4 is a versatile linear voltage regulator, featuring simultaneous tracking of multiple output voltages, low noise and input voltage operation, and high power supply rejection ratio. It is suitable for a wide range of applications, such as portable devices and automotive, industrial, and telecommunications. The device features a low dropout voltage, and high PSRR, resulting in improved efficiency and system performance.

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