MC7915BTG

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Voltage regulator modules are critical components in many electronic systems. Their primary purpose is to take unregulated power, regulate it to a desired voltage, and protect against shorts and overtemperatures. The MC7915BTG is a three-terminal negative voltage regulator designed specifically for battery powered, general-purpose electronics applications. It is available in two variants: a TO-92 package, and an adjustable version with a Pbfree termination finish. In this article, we\'ll look at the MC7915BTG’s application field and working principle.

The main purpose of the MC7915BTG is to regulate voltages for battery powered and general-purpose electronics applications. It has a wide input voltage range of 4.5V to 40V and an output voltage of -15V with 1.5 amp current capability. It features overload protection and over-temperature protection circuitry. The MC7915BTG operates in the internal pass mode and uses a series-pass element composed of an NPN power transistor, a Zener diode, and a resistor in a voltage-dividing network.

The MC7915BTG also features a built-in low on-resistance current limiter within the current limiting circuit. This circuit monitors the output current and limits it to 1.5A automatically when the rectified output is higher than 1.5A. The current limitation has the effect of limiting the output voltage, allowing the system to operate at a safe voltage current level. In addition, the MC7915BTG has a voltage reset capability. This reset mode quickly shuts down the system if the output voltage exceeds the preset level.

Powering the device is easily done with a single wire and no external source required. The MC7915BTG also features a wide temperature range of -40° to +85°C, perfect for industrial and automotive applications. With a high power-to-size ratio and a low quiescent current of 8mA, the MC7915BTG is a highly efficient drop-in replacement for the existing 7815 regulator.

In terms of performance, the MC7915BTG is able to deliver a stable 15Vdc output with excellent line and load regulation. It has a high output current capability of up to 1.5A with a maximum dropout voltage of 1V at 1A load. The device further exhibits low output noise and ripple under load transients. Furthermore, it has a high efficiency rating of 90% at a 1.5A load.

When used as a negative voltage regulator, the MC7915BTG is able to handle reverse voltages up to -30V, ensuring that it can be used in a wide variety of applications. Its reverse polarity protection is used to protect the device from damage due to external voltage transients. In addition, it has a thermal shutdown function which helps to protect the device from being overwheating.

In terms of advantages of the MC7915BTG, it has a wide operating temperature range, a high current capability, a high efficiency rating, and reverse polarity protection. In addition, it has a low dropout voltage, low output noise and ripple, and a reliable operation. All of these qualities make the MC7915BTG an ideal choice for battery powered and general-purpose electronics applications.

In conclusion, the MC7915BTG is an efficient three-terminal negative voltage regulator designed for battery powered and general-purpose electronics applications. It has a wide input voltage range, high output current capability, low quiescent current, reverse polarity protection, and a wide temperature range. It also features overload protection and over-temperature protection circuitry, as well as a built-in current limiter, making it an ideal choice for a variety of applications.

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