MC7905ACTG

Voltage Dropout (Max):	1.3V @ 1A (Typ)
Base Part Number:	MC79
Supplier Device Package:	TO-220AB
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	70dB (120Hz)
Current - Output:	1A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-5V
Voltage - Input (Max):	-35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Active
Packaging:	Tube

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Introduction

MC7905ACTG is a voltage regulator chip from On Semiconductor, designed to replace traditional three-terminal linear regulators. It features low stand-by current, ultra-low dropout voltage with wide input voltage range, low internal noise and fast transient response. The device is available in five different versions ranging from 1.5V to 15V, allowing it to be used in a wide range of applications, such as computers and peripherals, consumer electronics, and telecommunications systems.

Application Field

MC7905ACTG voltage regulators are mainly used to provide reliable, low noise and low ripple voltage regulation for a variety of electronic systems, including computers, laptops, mobile phones and other consumer electronic products. The device can also be used in automotive and industrial applications, as it has a low dropout voltage and excellent thermal performance. Additionally, the device has been designed to be particularly suitable for battery powered systems, thanks to its low quiescent current consumption, and its ability to regulate output voltage even in wide input voltage ranges.

Working Principle

MC7905ACTG voltage regulators work by comparing a reference voltage to the input or output voltage, in order to adjust the output voltage according to a set input-output regulation. This regulation ensures that the output voltage remains within the specified range and does not become too high or too low at any point, thus ensuring proper operation of the system. The device also features a feedback loop to regulate the current drawn from the power supply, and to monitor the system\'s performance.To further improve the performance and reliability of the voltage regulation, the device contains a P_OK (power-on) signal pin that provides an active-low output signal every time the input voltage reaches a pre-set threshold. This signal can be used to enable a system\'s power supply or reset its operation, as needed.

Conclusion

Overall, MC7905ACTG voltage regulators are a reliable and efficient solution for providing precise voltage regulation in a variety of applications. Due to its low dropout voltage and wide input voltage range, the device can be used in battery-powered systems, as well as a variety of industrial and automotive settings. The P-OK signal pin helps ensure proper operation of the system, making MC7905ACTG a reliable and effective choice for voltage regulation.

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