L79L08ACD13TR Integrated Circuits (ICs)

Current - Output:	100mA
Base Part Number:	L79L08
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	--
PSRR:	45dB (120Hz)
Current - Supply (Max):	6mA
Current - Quiescent (Iq):	5.5mA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-8V
Voltage - Input (Max):	-30V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The L79L08ACD13TR is a low-dropout regulator (LDO) integrated circuit that is specially designed for applications that require precise voltage regulation. This device can provide output voltages ranging from 3 to 15 Volts, and is capable of regulating voltages up to 20V under extreme conditions. Its wide range of voltage regulation makes it suitable for a variety of applications in various electronics. In addition, the L79L08ACD13TR also has a low quiescent current and excellent power supply rejection ratio (PSRR) of 70 dB (at 100 kHz). This feature makes the IC ideal for use in low noise and low power systems.

Substrate Configuration

The L79L08ACD13TR IC is powered by a +5 V supply and has an on-chip reference voltage of 2.5 V. It is a 4-terminal device, with the output pin, enable pin and ground pin connected to the drain terminal of the N-MOSFET. A P-N-P bipolar transistor is also incorporated in this device, so that it can be enabled through the enable control pin. The maximum current that can be drawn from the output of the device is limited to 500 mA.

Application Fields

The L79L08ACD13TR linear voltage regulator is mainly used in applications where precise voltage regulation is required. It is suitable for use in battery-powered systems, as its low quiescent current allows for reduced energy consumption. Moreover, its wide regulating range and high current capability make it suitable for automotive and industrial systems.The IC can also be used in areas such as audio and video equipment, telecommunication and consumer electronics. Its high PSRR ensures a good signal quality, while its wide operating temperature range makes it a reliable device to use in harsh environmental conditions.

Working Principle

The L79L08ACD13TR operates on the principle of negative feedback. It is a three-terminal voltage regulator IC, with the output, ground and enable pins connected to a PNP bipolar transistor that has a current gain of around 100.The base of the PNP bipolar transistors is biased by the internal 2.5V reference voltage. This reference voltage provides a precise output voltage. When the input voltage exceeds the precise output voltage, the transistor conducts more current, which reduces the base current and thus reduces the output voltage. This, in turn, allows precise voltage regulation.

Conclusion

The L79L08ACD13TR is a versatile and reliable Linear Voltage Regulator IC, suitable for a wide range of applications. The IC is powered by a +5V supply and has a 2.5V reference voltage. Its wide regulating range and high current capability, combined with its high PSRR and low quiescent current make it an ideal choice for low power and low noise systems. Its working principle is based on a PNP bipolar transistor, and the precise voltage regulation is achieved through negative feedback.

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