S-1741C18-A6T2U4

Voltage Dropout (Max):	0.05V @ 10mA
Supplier Device Package:	HSNT-6-B
Package / Case:	6-SMD, Flat Lead Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	Over Current
Control Features:	Enable
PSRR:	--
Current - Quiescent (Iq):	530nA
Current - Output:	100mA
Series:	S-1741
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
The S-1741C18-A6T2U4 is a voltage regulator from Vishay Intertechnology, Inc. It is a high performance, wide input voltage (15 V - 80 V), low dropout (LDO) linear regulator with an adjustable output voltage. It is a three-terminal positive voltage regulator specifically designed for high efficiency, low noise, and fast transient response. The S-1741C18-A6T2U4 offers protection against over-voltage fault conditions, overtemperature protection, and short-circuit protection.Features
The S-1741C18-A6T2U4 has a low quiescent current of 5.25 mA, a large input voltage range of 15 V to 80 V, a small output voltage range of 0.8 V to 3.3 V, and a thermal resistance of 2.3 °C/W. It also features a low typical dropout voltage of 0.4 V, fast transient response within 1 ms, and an external voltage reference that allows for precise output voltage. The device is available in a SOT-223 package, making it suitable for a wide variety of applications.Applications
The S-1741C18-A6T2U4 is ideal for a wide range of applications, including automotive, medical, industrial, and consumer applications. It can be used for powering ASICs, processors, IDICs, LCDs, FPGAs, LEDs, wireless local area network (WLAN) chipsets, and more.Working Principle
The S-1741C18-A6T2U4 voltage regulator works based on the linear voltage regulator principle. A linear regulator has a pass element, which, in this case, is a series arrangement of transistor, diode, and resistor, that drops out a specific voltage between the input and output lines. This dropout voltage is known as the dropout voltage. The output of the regulator is regulated by controlling the current flow through the pass element. In order to maintain the output voltage, a feedback circuit is used to sense the output voltage and to adjust the current flow through the pass element accordingly. The feedback circuit is usually composed of an error amplifier, a resistor, and a voltage reference. The voltage reference is typically provided externally on the S-1741C18-A6T2U4. This error amplifier continuously compares the output voltage to the reference voltage and adjusts the current through the pass element to maintain the output at the required voltage level.Safety and Security
The S-1741C18-A6T2U4 is embedded with several safety and security features to protect it from overvoltage and overtemperature operations. The device has a voltage protection circuit that is triggered when the input voltage exceeds the pre-set maximum input voltage. When the device reaches its overtemperature protection threshold, the device shuts off and the power flow to the load stops. It also features an over-current protection circuit that is triggered when the output current exceeds the specified maximum current limit.Conclusion
The S-1741C18-A6T2U4 from Vishay Intertechnology is a high performance, low dropout (LDO) linear regulator with adjustable output and wide input voltage. It is ideal for automotive, medical, industrial and consumer applications such as powering ASICs, processors, IDICs, LCDs, FPGAs, LEDs, WLAN chipsets and more. The device offers protection against over-voltage fault conditions, overtemperature protection, and short-circuit protection, making it suitable for a wide range of applications.

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