IRU1117CD

Current - Output:	800mA
Base Part Number:	IRU1117CD
Supplier Device Package:	D-Pak
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 150°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	70dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.3V @ 1A
Voltage - Output (Max):	3.6V
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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IRU1117CD is a three-terminal adjustable linear voltage regulator from International Rectifier Corporation. It is designed as a low-dropout and low-power, low-noise linear regulator for a wide range of portable power applications. It offers high output accuracy, excellent load regulation, silent operation, and low quiescent current.The IRU1117CD is a replacement for the popular 78xx and 79xx regulators because of its superior performance and superior output accuracy. It is available in an industry-standard SOT-223 package and provides an output voltage range of 1.25V to 15V.FeaturesThe IRU1117CD offers several key features, including: • Low dropout voltage: 200mV (typical)• Low operating current: 400µA (typical)• Low quiescent current: 45µA (typical)• Output voltage accuracy: 0.1% (max)• Low output noise: 0.2mV (max)• High output current: 1.5A (max)• Operates at up to 70°CApplication FieldThe IRU1117CD is designed for use in a wide range of applications such as cellphones, PDAs, hand-held devices, PCs, and ADSL modems. It can also be used for voltage regulation in lithium-ion and alkaline battery-powered systems. Additionally, it is used to power small motors and solenoids, as well as LCD and LED backlights.Working PrincipleThe IRU1117CD uses a three-terminal adjustable linear regulator. It consists of a series of transistors in order to create a three-terminal regulator with very low quiescent current. This allows the output voltage to remain stable even when the input voltage changes dramatically.The input voltage is applied to the regulator’s input terminal, and the output voltage is taken from the regulator’s output terminal. An internal voltage reference is connected between the input and output terminals. When the output voltage is below the reference voltage, the output transistors are activated, allowing current to flow through the output. When the output voltage is equal to the reference voltage, the output transistors are disabled, preventing current flow.At the same time, the output voltage is also monitored through a feedback pin, connected to the output terminal. If the output voltage is below the reference voltage, the feedback pin will be low, causing the regulator to adjust the output voltage until it matches the reference voltage. This allows the regulator to keep the output voltage stable, providing regulated voltage.The IRU1117CD also includes a number of protection features, such as output over-current, output over-temperature, and output short-circuit protection, making it safe and reliable for use in high-power applications.ConclusionThe IRU1117CD is a high-performance, low-dropout, low-power, low-noise linear voltage regulator from International Rectifier Corporation. It features excellent output accuracy, silent operation, low quiescent current, and a wide range of protection features. It is suitable for a variety of applications, including cellphones, PDAs, hand-held devices, PCs, and ADSL modems.

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