LF50CPT

Current - Output:	500mA
Base Part Number:	LF50
Supplier Device Package:	PPAK
Package / Case:	TO-252-5, DPak (4 Leads + Tab), TO-252AD
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	76dB ~ 60dB (120Hz ~ 10kHz)
Current - Supply (Max):	12mA
Current - Quiescent (Iq):	1mA
Series:	--
Voltage Dropout (Max):	0.7V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The LF50CPT is a low-power linear voltage regulator from Texas Instruments. It is a good choice for fixed, low-voltage applications. The LF50CPT offers an adjustable output voltage of 0.3 V to 10 V, low dropout voltage of 1.2V, wide operating temperature range of -40°C to 125°C, good output current capability of up to 500 mA, and low quiescent current. The IC is available in a TO-220 package, making it easy to mount on a PCB, and also offers over voltage protection.

Applications

The LF50CPT can be used in a variety of applications. It can be used to power wireless communication devices, such as radio transceivers, as well as embedded controllers and analog circuits. It is also used in automotive and industrial applications, such as LED lighting, RFID systems, embedded controllers, and data acquisition systems.

Working Principle

The LF50CPT consists of two parts: an internal voltage reference and an adjustable shunt regulator. The internal voltage reference produces a stable output voltage, and the adjustable shunt regulator is used to regulate the output voltage. It works by setting a reference voltage, which sets the output voltage of the IC. The adjust pin is connected to a resistor, which sets the reference voltage. The reference voltage is then compared to an internal thermal-foldback diode, and the output voltage is adjusted accordingly. The result is a stable output voltage, even under temperature fluctuations.

Conclusion

The LF50CPT from Texas Instruments is an easy-to-use, low-power linear voltage regulator designed for fixed, low-voltage applications. It has a wide adjustable output voltage range of 0.3V to 10V, low drop out voltage of 1.2V, wide operating temperature range of -40°C to 125°C, good output current capability of up to 500 mA, and low quiescent current. The device is also protected against overvoltage conditions.The LF50CPT is suitable for a variety of applications, including wireless communication, automotive and industrial applications, and embedded controllers. The IC works on the principle of adjusting a reference voltage with a resistor and then comparing it to an internal thermal foldback diode to make the necessary adjustments. The result is a stable output voltage, even when temperatures fluctuate.

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