MC7915CD2TG

Voltage Dropout (Max):	1.3V @ 1A (Typ)
Base Part Number:	MC79
Supplier Device Package:	D2PAK
Package / Case:	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	60dB (120Hz)
Current - Output:	1A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-15V
Voltage - Input (Max):	-35V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Active
Packaging:	Tube

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MC7915CD2TG Application Field and Working Principle

MC7915CD2TG is a linear voltage regulator designed for general-purpose and specialized power management applications. It is in the family of Monolithic integrated circuits from Texas Instruments. MC7915CD2TG is ideal for a variety of applications, such as industrial, automotive, and consumer electronics equipment.

Functional Attributes

MC7915CD2TG provides a stable output voltage of 15V over a wide range of input and load conditions. It is designed to operate as a constant voltage source or Fixed-Voltage Regulator (FVR). Its maximum output current capability is 1A. Its temperature range is between -40˚C and 125˚C and its load transient response is less than 5µs. Its quiescent current consumption is extremel y low, typically 0.2 mA.The device also offers under-voltage and over-voltage protection as well as current limiting. If a load demand exceeds 1A, the regulator will enter into its current limiting mode.

Features and Benefits

MC7915CD2TG offers a wide range of advantages for the user: • It offers a low quiescent current and thermal performance.• It can provide a very stable 15V output voltage. • Its wide temperature range allows for improved efficiency and reliability. • Its low EMI performance and low power dissipation compare favorably to other linear regulators. • Its fast response time and current limiting feature make it suitable for applications where quick power management is needed.• Its wide input voltage range of 5V to 16V covers many applications.• With its monolithic construction, it integrates several functional blocks that reduce design complexity.• With its low drop out voltage and its highly accurate output voltage capability, MC7915CD2TG is a great choice for power related applications.

Design Considerations

When designing a system that uses a MC7915CD2TG linear voltage regulator, several considerations should be taken into account. • Due to its high accuracy and low output noise, MC7915CD2TG is suitable for use in sensitive audio and video applications. • To ensure stability and accuracy, the output voltage should be monitored and trimmed if necessary. • It is important to ensure that the voltage on the input side is within the maximum specified range and is sufficiently higher than the output voltage. • A suitable heatsink should be provided in order to maintain the regulator’s temperature within limits. • Appropriate capacitance should be incorporated at the input and output pins in order to improve the low frequency response and reduce the output noise. • Decoupling caps should be used to provide a path for high frequency noise and reduce the effect of noise on the regulator. • Appropriate current limiting should be applied in order to protect the regulator from excessive current surges.

Applications

MC7915CD2TG is ideal for a wide array of applications. It is an excellent choice for industrial, automotive, consumer electronics and special purpose applications where a clean, stable and reliable 15V output is required. • Automotive electronics. • Automated test equipment. • Process control and instrumentation. • Personal computers and peripheral equipment. • Audio-video equipment. • Switching power supplies.• Battery powered applications.• Telecommunications equipment.

Working Principle

MC7915CD2TG is a three-terminal linear voltage regulator. It operates according to a straightforward principle. The voltage between the regulator’s input terminal and ground is always higher than the voltage at the output terminal. This difference between the input and output is known as the drop-out voltage and is determined by the amount of current supplied by the regulator. The device works by comparing the regulated voltage at its output terminal to a reference voltage produced by an internal reference. If the output voltage is too low, then the internal circuitry of the regulator starts to increase the voltage by diverting some of the input current through a pass device. This process continues until the output voltage is equal to the reference voltage. The regulator also has an internal current limitation circuit, which prevents it from supplying more than the specified output current. If the output current exceeds the limit, the regulator will enter into its current limiting mode and reduce the output current until the maximum allowable current is reached. Thus, MC7915CD2TG is an efficient and reliable linear voltage regulator, offering stable output voltage over a wide range of inputs and load conditions. Its wide temperature range and low input/output voltage difference make it ideal for a variety of applications.

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