FT511AB Integrated Circuits (ICs)

Voltage Dropout (Max):	0.7V @ 100mA
Supplier Device Package:	SOT-89-3LA
Package / Case:	TO-243AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current
Control Features:	--
PSRR:	--
Current - Quiescent (Iq):	1.6µA
Current - Output:	150mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction to FT511AB

FT511AB is a linear voltage regulator from ON Semiconductor, designed to supply regulated power to a wide range of applications. It has a wide operating temperature range of -20°C to +85°C and a low quiescent current of 1µA typical making it highly suitable for power-sensitive applications. FT511AB provides an adjustable output from a minimum of 0.5V up to a maximum of 20V with a voltage tolerance of ±2%. It is capable of providing up to 800mA of output current, making it suitable for a wide range of applications.

Applications

FT511AB is highly suited to a wide range of applications, ranging from light-duty regulated power supplies, up to industrial-grade power supply designs. Some of the common applications of FT511AB are:

• Battery-powered electronics
• Small consumer electronics such as speakers, headphones, digital audio players, etc.
• USB-powered gadgets, such as external storage devices
• Experimental electronics, such as development boards, microcontroller systems and prototyping
• Automotive infotainment systems
• Security systems such as access control and CCTV
• Medical equipment
• Industrial applications such as factory automation and motor control systems

Features

FT511AB provides a wide range of features and capabilities to make it suitable for a wide range of applications, including:

• Wide 2.0V to 20V operating voltage range
• Adjustable voltage output from 0.5V to 20V
• Low quiescent current of 1µA typical @25°C
• Operating temperature range of -20°C to +85°C
• Voltage tolerance of ±2%
• ESD (Electrostatic Discharge) protection
• Reverse-voltage protection
• Over-temperature protection
• Over-current protection
• Over-voltage protection
• Output short-circuit protection
• Thermal shutdown
• Lightweight, small package

Working Principle

The working principle of FT511AB is based on a classic Linear Regulator (LDO), where it regulates the input voltage to a set output voltage. It consists of a feedback circuit and a pass transistor. The feedback circuit adjusts itself to maintain the output at the desired level.When the input voltage is greater than the output voltage, the regulator will start to operate and the output voltage will be regulated at the desired value. The pass transistor, which is connected to the output, will be activated and it will start to draw current from the output of the regulator. This current is then delivered to the load, while the unused current is re-fed back to the input. The result of this process is that the output voltage is maintained at the desired level.Moreover, FT511AB also comes with basic protection features such as short-circuit and over-voltage protection. This allows the regulator to protect itself and the connected load from unsafe operating conditions.

Conclusion

FT511AB is a linear voltage regulator that offers a wide range of features and performance capabilities. It is suitable for a wide range of applications, and its low quiescent current and wide temperature range make it ideal for power-sensitive applications. It is also equipped with protection features such as short-circuit and over-voltage protection. Overall, FT511AB is a great choice for a wide range of voltage regulation applications from light-duty regulated power supplies, to industrial-grade power supply designs.

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