L4931ABDT80-TR Integrated Circuits (ICs)

Current - Output:	250mA
Base Part Number:	L4931AB
Supplier Device Package:	DPAK
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	67dB ~ 55dB (120Hz ~ 10kHz)
Current - Supply (Max):	7mA
Current - Quiescent (Iq):	1.6mA
Series:	--
Voltage Dropout (Max):	0.8V @ 250mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	8V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The L4931ABDT80-TR is an adjustable low dropout positive regulator chipset manufactured by STMicroelectronics. Trademarked as the STSPIN Low Dropout Motor Libo, this chipset is intended to provide a variable voltage output with a high degree of flexibility in an affordable, small form factor. It is designed to provide up to 3A of current and an adjustable output voltage ranging from 1.5V to 8V, making it a suitable choice for designers in a range of industries. This paper will discuss the application field and working principle of the L4931ABDT80-TR.

Application Field

The L4931ABDT80-TR has broad application potential due to its adjustable output voltage and high current capabilities. It is most commonly used in motor control systems, where a range of voltages is required to control different elements. This makes it a great choice for industrial automation applications and robotics. It is also ideal for medical equipment, wearable health monitoring systems and other types of wearable and portable electronics. It is exceptionally suitable for use in mobile and low power applications due to its low on-resistance and fixed-voltage option. It can also be used to provide 15V or higher output in distributed power systems, providing a wide range of applications.

Working Principle

The L4931ABDT80-TR features a positive-output regulator combined with a negative-output regulator and a precision reference input stage. This combination allows for precise, low dropout output voltage regulation. A wide range of voltage adjustment can be obtained by varying the reference voltage on the pin REF+.The negative-output regulator combines low dropout and low input/output ratio performance. It is designed to provide a wide range of output voltage levels, providing smooth voltage regulation over a range from 0.6V to 8V. The positive-output regulator combines several features that allow for a high degree of flexibility and power efficiency. It is configured for low-voltage operation. This enables it to deliver higher current compared to other devices, further expanding its range of applications.

Conclusion

In conclusion, the L4931ABDT80-TR is a versatile and efficient voltage regulator chipset suitable for a range of applications. Its adjustable output voltage, low input/output ratio performance and low on-resistance features make it suitable for industrial automation, medical systems, distributed power systems and a range of other applications. Its combination of positive- and negative-output regulators and precision reference input stage allows for precise, low dropout output voltage regulation.

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