LD1117D18

Current - Output:	800mA
Base Part Number:	LD1117
Supplier Device Package:	8-SO
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:	75dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.2V @ 800mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	15V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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LD1117D18 Application Field and Working Principle

Linear Voltage Regulators (LD1117D18) are utilized in a variety of devices and applications. Common applications include DC/DC converters, mobile devices, and audio amplifiers. They are primarily used in power management and power supply solutions for regulating the input voltage and current. They are also sometimes used for voltage monitoring and voltage tracking.The LD1117D18 is a popular low dropout voltage regulator (LDO) developed by STMicroelectronics. It is a low dropout, high current device that can deliver up to 1.5A at a regulated output voltage from 1.2V to 15V. The device has an extremely low dropout voltage of 150mV and excellent transient response for voltage regulation and can operate over an input voltage range of 1.2V to 20V.The working principle of the LD1117D18 is based on the standard regulator design. It consists of an error amplifier, a reference voltage, and a P-channel power MOSFET. The error amplifier monitors the output voltage and compares it to the reference voltage. When the output voltage changes, the error amplifier adjusts the gate voltage of the P-channel MOSFET which adjusts the current from the input to the output.The LD1117D18 is designed to be a very robust and reliable device and offers a number of features to ensure a reliable output voltage and current. It has an active voltage positioning circuit that ensures an accurate and stable output voltage, even under transient or load changes. It also has an ultra-low quiescent current of 10μA (typical) which makes it suitable for battery-powered applications. It has excellent thermal characteristics with a maximum junction temperature of 125°C, allowing it to operate in extreme temperature applications.In summary, the LD1117D18 is a robust and reliable low dropout linear voltage regulator. It offers a regulated voltage and current output with accurate and stable voltage positioning, low quiescent current, and excellent thermal characteristics. It is widely used in power management and power supply solutions for regulating the input voltage and current and for voltage monitoring and voltage tracking.

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