UA78L15ACLPE3

The UA78L15ACLPE3 is part of a family of linear voltage regulators designed and manufactured by the Texas Instruments Corporation. It is a three-terminal, very low drop-out (VLDO) regulator with an output voltage range of 1.5V to 15V. The UA78L15ACLPE3 is a monolithic integrated circuit that includes both the regulator and protection circuits, allowing it to be used in a variety of applications.

Application Field of UA78L15ACLPE3

The UA78L15ACLPE3 is used in a variety of applications, including medical and consumer electronics. It is particularly suited for embedded systems where the regulated voltage is needed for communication, clock and sensor functions, as well as for powering of logic circuits and peripheral devices. This device has a high accuracy, low quiescent current, low dropout voltage and fast transient response, providing a reliable and efficient solution for these applications.

This device can also be used in automotive, industrial, and avionics applications where reliable and accurate low voltage regulation is required. It can be used in battery-powered systems, providing a wide operating range with an input voltage of up to 60V, and it meets automotive grade safety requirements. This device has a wide temperature range with an extended operating range of - 40 to +125 degrees Celsius, offering reliable operation in harsh environments.

Working Principle of UA78L15ACLPE3

The UA78L15ACLPE3 is a monolithic linear voltage regulator integrated circuit (IC). It consists of an error amplifier, a reference voltage source, a voltage divider made from two resistors, and a series pass element. The error amplifier compares the actual output voltage with a reference voltage, amplifies the difference, and drives the pass element which regulates the output voltage.

The error amplifier can operate in two modes, an internal voltage reference or a voltage divider to achieve an external reference voltage. When operating with the internal voltage reference, the device produces a fixed output voltage of 1.5V +/- 2mV of accuracy. When operating in the external reference mode, the device is set up to produce any output voltage between 1.5V and 15V with a typical accuracy of +/- 10mV.

The UA78L15ACLPE3 is designed with a very low quiescent current. The current consumption is typically 2 mA in normal operation and less than 1 μA in shutdown mode. This allows the device to be used in power-sensitive applications where low power consumption is critical. The device is also designed with a low dropout voltage, typically less than 100 mV, allowing the output voltage to be maintained at its nominal value even with a large differential between the input and output voltages.

The UA78L15ACLPE3 offers fast transient response and excellent load and line regulation. It can deliver up to 500mA of continuous current and has a wide operating temperature range of -40 to +125 degrees Celsius. The device is also designed to meet automotive grade requirements, which makes it ideal for automotive and avionics applications.

Conclusion

The UA78L15ACLPE3 is an advanced monolithic linear voltage regulator with very low dropout voltage, low quiescent current, fast transient response and excellent load and line regulation. It is designed to meet automotive grade specifications, making it an ideal regulator for automotive and avionics applications. This device can be used in a variety of applications, including medical, consumer electronics, and embedded systems where high accuracy and reliable low voltage regulation is required.