FAN2512S27X

Current - Output:	150mA
Base Part Number:	FAN2512
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature
Control Features:	Enable
PSRR:	43dB (120Hz)
Current - Quiescent (Iq):	50µA
Series:	--
Voltage Dropout (Max):	0.18V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.7V
Voltage - Input (Max):	6.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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FAN2512S27X Application Field and Working Principle

The FAN2512S27X, from Fairchild Semiconductor, is a 3A adjustable voltage regulator. It is suitable for an array of applications, including, but not limited to, DC/DC converters, or as a post regulator in step-down DC/DC converters. This voltage regulator IC has minimal external components, and is extremely reliable with minimal standby power consumption.The FAN2512S27X is a linear, adjustable 3-terminal negative voltage regulator. Its nominal output voltage is -2.7V but its output voltage can be adjusted to meet other requirements. It is designed around an N-channel MOSFET based circuitry, ensuring consistently high efficiency and low output noise, making it suitable for a variety of applications. It also incorporates a foldback current-limiting feature, and an enable/shut down function. The output voltage of the FAN2512S27X is adjustable with two external resistors, and this provides flexibility in setting the output voltage. The current through the adjust pin is roughly a few hundred microamps, so the resistance can be around hundreds of kilo-ohms with appropriate power rating. The enable/shutdown feature can be used to shut down the regulator from an active state to a quiescent state, with high logic signal used for enable and low logic signals used for shut down. The FAN2512S27X has a very low quiescent current of 0.5μA, with the maximum operating temperature of 125°C. It has an adjustable output current up to 2.7A, output voltage of -2.7V, and an over voltage protection of -44V. The FAN2512S27X also has a built-in thermal protection circuit, which enhances its reliability and safety.In terms of application, the FAN2512S27X is suitable for linear voltage regulators. The 3-adjustable pins provide current, output voltage and enable/shutdown features. Generally, a linear regulator requires an input voltage supply of at least 3V higher than the output voltage. The device is designed to operate at a temperature range of -40°C to +125°C, and can be combined with various external components to form a complete regulator system.In terms of installation, two types of gate-drive source can be provided for the FAN2512S27X. The first type is the external source via the Gate pin, which is suitable for light loads. The second one is the internal DC/DC converter with an internal reference voltage and low quiescent current. It is suitable for heavy loads and provides protection from thermal overloads, as well as reverse-voltage protection. The intended application field of the FAN2512S27X is in DC/DC converters, power management and various other applications, including cell phone battery chareges. It is suitable for linear voltage regulation applications where the output voltage can be precisely controlled or regulated within a specified minimum limit. Furthermore, it is also suitable for controlling LED lighting, automotive power management, temperature control systems, and medical electronic equipment.In conclusion, the FAN2512S27X is an adjustable 3-terminal negative voltage regulator that offers flexibility with its adjustable output voltage and minimal external components. It is suitable for a wide range of applications, from cell phone battery chargers to automotive power management. The device is particularly suitable for linear voltage regulation applications, and offers high reliability with its foldback current-limiting feature and thermal protection circuit.

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