UA78L12ACLPM Integrated Circuits (ICs)

Voltage Dropout (Max):	1.7V @ 40mA
Base Part Number:	UA78L12
Supplier Device Package:	TO-92-3
Package / Case:	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Short Circuit
Control Features:	--
PSRR:	42dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	12V
Voltage - Input (Max):	27V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Box (TB)

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Introduction

The UA78L12ACLPM is a popular low drop-out voltage regulator designed for an array of application needs. It is a Linear Voltage Regulator (PMIC) produced by STMicroelectronics, a global leader in the design and manufacture of advanced semiconductor components and electronic systems. The UA78L12ACLPM is designed to meet stringent power requirements and provide high efficiency, flexibility and cost-effectiveness.

Overview of Features

The UA78L12ACLPM is a three-pin regulator capable of providing a fixed output of 12V. It is designed to be capable of supplying up to 1.5A of output current and provides short-circuit protection, reverse current protection and over-temperature protection. It also features a low quiescent current, low drop-out voltage, output current monitor pin and a low ground current.The three pins of the UA78L12ACLPM are GND, Output and Input. The Input voltage rating of the regulator is 7.5V to 25V and its output current range is 0.3A to 1.5A. It has a maximum power dissipation rating of 7.5W. The UA78L12ACLPM\'s quiescent current is typically 1.5mA and its drop-out voltage is typically 0.3V at full load.

Applications

The UA78L12ACLPM can be used in a variety of applications. It is suitable for use in high efficiency, AC-DC and DC-DC converter designs, DC-to-DC converters, switching mode power supplies, charging supplies, LED drivers and many more. It is also suitable for low voltage, high current applications such as servers, personal computers, data storage systems and more.

Working Principle

The working principle of the UA78L12ACLPM is simple. The regulator has an internal voltage reference, which is compared to the input voltage. If the input voltage exceeds the reference voltage, the regulator reduces the input voltage until it matches the reference voltage. This process is known as voltage regulation.The regulator uses a power transistor to control the current flow and a resistor network to limit the effective output voltage. The internal circuitry of the regulator prevents shorting of the circuit and limits the effective output current to a safe amount.

Conclusion

The UA78L12ACLPM is an easy-to-use voltage regulator designed to provide an efficient and cost-effective solution to a variety of power application needs. It is designed to meet stringent power requirements and provide high efficiency, flexibility and cost-effectiveness. With its low quiescent current and low drop-out voltage, the UA78L12ACLPM is capable of delivering a reliable output current while providing short-circuit protection, reverse current protection and over-temperature protection. It is suitable for use in AC-DC, DC-DC and DC-to-DC converter designs and can be used for a variety of power applications.

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