NJM79L05L2A

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Output Configuration:	Negative
Output Type:	Fixed
Number of Regulators:	1
Voltage - Input (Max):	-30V
Voltage - Output (Min/Fixed):	-5V
Voltage - Output (Max):	--
Voltage Dropout (Max):	--
Current - Output:	100mA
Current - Quiescent (Iq):	6mA
PSRR:	71dB (120Hz)
Control Features:	--
Protection Features:	Over Temperature, Short Circuit
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package:	TO-92-3

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NJM79L05L2A Application Field and Working Principle

NJM79L05L2A, a general purpose linear regulator, is a highly precise and reliable three-terminal voltage regulator from the company New Japan Radio Corp (NJRC). It is categorized under PMIC – Voltage Regulators – Linear and features an adjustable output voltage of up to 5.4V and an output current of up to 2A, thereby making it suitable for a variety of applications including precision power supplies, voltage control and various other power management applications. This device draws lower quiescent current than competing products, providing a better performance with a high level of efficiency.

Features of NJM79L05L2A Linear Regulator

NJM79L05L2A linear regulator has several key features, including:

• Output voltage range adjustable from 0.8V to 5.4V
• Output current of up to 2A
• High accuracy (typically ±1% maximum deviation)
• Output noise cancellation
• Linear shutdown mode
• Operating junction temperature range of 0°C to +125°C
• Surface mount package

Application Fields for NJM79L05L2A Linear Regulator

NJM79L05L2A linear regulator is suitable for a wide range of applications, including:

• Battery powered systems
• GSM phones
• Wireless handsets
• Cellular phones
• Printers
• Portable media players
• Handheld computers
• USB port applications

Working Principle of NJM79L05L2A Linear Regulator

NJM79L05L2A linear regulator works on a closed-loop control principle. Input voltage is applied to the IN terminal and the output voltage is supplied from the OUT terminal. The internal Error Amplifier (EA) performs a comparison between the sensed output voltage and a preset reference voltage. It then sends the relevant control signal to the Control Element (CE), which in turn adjusts the current flowing through the Output Transistor (OT) accordingly. As a consequence, the output voltage remains constant.

Advantages of NJM79L05L2A Linear Regulator

NJM79L05L2A linear regulator is designed with an advanced monolithic process technology and thus boasts of several advantages, including:

• High current and temperature stability
• Lower quiescent current consumption compared to competing products
• High efficiency at low and medium load current (no power consumed by loss components)
• Excellent line and load regulation
• Extremely low dropout voltage (good for power conservation)
• Built-in noise canceling function
• Integrated linear shutdown mode (for power conservation)

Conclusion

NJM79L05L2A is an adjustable, low-dropout linear regulator that is suitable for a variety of applications. It follows the closed-loop control principle and features several advantages, including stability, low quiescent current, very low dropout voltage, excellent line and load regulation, noise cancellation and a built-in linear shutdown mode. Here, this device proves to be an ideal choice for battery powered, GSM and cellular phone applications, as well as in devices such as printers, portable media players and handheld computers.

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