S-817B27AY-B-G

Voltage Dropout (Max):	0.51V @ 10mA
Supplier Device Package:	TO-92-3
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Protection Features:	--
Control Features:	--
PSRR:	--
Current - Quiescent (Iq):	2.5µA
Current - Output:	35mA
Series:	S-817
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.7V
Voltage - Input (Max):	10V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Bulk

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Introduction

The S-817B27AY-B-G is part of a series of Linear Voltage Regulators (LVRs) manufactured by STMicroelectronics. It is described as a high-side constant current LVR, which provides a regulated output current with a wide input voltage range of 6.0V to 25V. The S-817B27AY-B-G is available in a convenient, ultra-small 3mmx3mm package, making it ideal for a variety of low-power, industrial and automotive applications.

Application Fields

The S-817B27AY-B-G is well suited for use in a variety of applications due to its wide input range, small package, and ease of use. This LVR can be used in a variety of automotive systems, including infotainment, active safety, ADAS, and body electronics. In addition, it can be used in industrial settings such as HVAC and white goods, as well as in communication equipment. This LVR is also suitable for use in low power portable equipment, including Bluetooth audio applications, smartphones, and wearable devices.

Features and Benefits

The S-817B27AY-B-G features a wide input voltage range, allowing it to be used in a variety of applications. In addition, the LVR has a low drop-out voltage, making it ideal for low-power applications. This LVR is also designed to be protected from over-temperature and over-load conditions, allowing it to be used in a variety of conditions. Furthermore, the S-817B27AY-B-G has an adjustable current limit, making it suitable for applications that require a precise current level.

Working Principle

The S-817B27AY-B-G is a linear voltage regulator, meaning it uses a linear voltage regulator circuit to step down the input voltage to the desired output voltage. The input voltage passes through an error amplifier, which regulates the output voltage by comparing it to a reference voltage. The output of the error amplifier is then sent to the voltage regulator, which adjusts the output current accordingly. The output current is then passed through the current limit circuit, which sets the maximum current output of the regulator.The S-817B27AY-B-G also features an over-temperature protection circuit, which limits the output current when the IC temperature reaches a certain level. Additionally, the LVR has an over-load protection circuit, which automatically shuts down the output when the output current is higher than a certain threshold. Furthermore, the LVR is also protected from electromagnetic interference, ensuring that the output current will remain regulated even when exposed to external EM interference.

Conclusion

The S-817B27AY-B-G is a high-end linear voltage regulator designed for applications requiring a constant current output. This regulator is well suited for use in a variety of automotive, industrial and consumer applications due to its wide input range, small package, and reliable protection features. It is simple to integrate and can be adjusted to provide a precise output current, making it a great choice for any low-power applications.

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