LT1175IT-5#PBF

Current - Output:	500mA
Base Part Number:	LT1175
Supplier Device Package:	TO-220-5
Package / Case:	TO-220-5 Formed Leads
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C
Protection Features:	--
Control Features:	Current Limit, Enable
PSRR:	60db ~ 15dB (1kHz ~ 100kHz)
Current - Quiescent (Iq):	80µA
Series:	--
Voltage Dropout (Max):	0.7V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-5V
Voltage - Input (Max):	-20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Active
Packaging:	Tube

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Introduction

LT1175IT-5#PBF is a monolithic voltage regulator chip produced by Linear Technology Corporation. As a low-profile, advanced-performance power management chip, this chip is widely used in various types of special occasions and provides one-stop power management solutions.

Application Field

LT1175IT-5#PBF has a variety of application fields, including telecommunications, server computing, automotive and portable power, industrial system power and embedded control.

• Telecommunications: The chip is widely used in communication systems such as power supplies, CPU power supplies, and network equipment. The low-power feature ensures the quality of the transmission signal.
• Server Computing: With its high stability, the chip can operate stably in high-temperature environment, providing reliable power supply for high-power computer server.
• Automotive and Portable Power: The chip is also suitable for use in harsh environment such as high temperature, dust and vibration, providing stable power supply for automotive systems and portable electronic products.
• Industrial System Power: LT1175IT-5#PBF is also widely used in industrial control systems, providing low standby power consumption and high efficiency.
• Embedded Control: Based on its low cost and highly integrated design, this chip can provide power supply solutions for various embedded control applications.

Working Principle

LT1175IT-5#PBF takes the output voltage as the reference, connects to a controllable current source, and applies a current proportional to the total input voltage. When the output voltage is lower than the reference voltage, the chip’s current source will increase to offer greater output voltage, and vice versa.The internal circuit of the chip is designed in a certain way, like a loop. The main parameters of this loop are voltage and the current, the voltage is provided by the reference and the current is the product of the error amplifier. The whole loop is a typical Feedback System.The input voltage, the reference voltage, and the amplifier output are compared in an error amplifier ,and when the two inputs are equal, the amplifier will output a representation of “0”. When the input voltage is greater than the reference voltage, the error amplifier will output a larger gain, which causes the current source be increased and the output voltage be regulated to the same level as the reference had.When the input voltage is lower than the reference voltage, the opposite action will occur, the error amplifier will output a smaller gain and the output voltage is then adjusted accordingly. This loop allows the chip to work stably at a lower power dissipation and in a wide temperature range.

Conclusion

In conclusion, LT1175IT-5#PBF is a low-profiled monolithic voltage regulator chip that is suitable for a wide range of applications. It has a wide temperature range, low power dissipation, and high efficiency. With its high stability and low cost, it provides one-stop power management solutions.

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