UA78L12ACLPRE3

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The UA78L12ACLPRE3 is an adjustable 3-terminal positive voltage regulator integrated circuit. It is designed for a wide range of applications such as for use in battery powered systems, general purpose supplies, or anywhere a very low dropout voltage is required. This voltage regulator can output a constant voltage from 1.2V to 3.3V with a ground current of only 2.2mA, making it energy efficient and perfect for applications which require low voltage and low power consumption.

The UA78L12ACLPRE3 falls into the category of PMIC (Power Management ICs) and Voltage Regulators. Its specific type is Linear; hence it achieves voltage regulation by using a variable resistor. The regulator is able to take an input voltage range of 3.0V to 25V and output a voltage that is stable and adjustable. This voltage is set by using a single external resistor connected between VOUT and ADJ pins.

The working principle of the UA78L12ACLPRE3 is relatively simple. The input voltage is fed into a three lead device connected at the respective pins – In, Out and Adj. Adj is connected to a resistor and this helps determine the output voltage. This voltage regulator should have a minimum stability of 1.2V and a maximum of 3.3V. Next, the voltage across the output is compared to an internal reference voltage. The difference signal between the two is then amplified and fed to an error amplifier.

The error amplifier then modifies the output voltage output by the voltage reference in order to ensure the output voltage remains steady and at the desired voltage (determined by the external resistor). Finally, the amplified signal is sent to a series pass transistor, which acts as a switch and regulates the input to the output, allowing only the desired amount of current to pass.

The UA78L12ACLPRE3 can handle an input voltage of up to 25V and output current of up to 800mA, which is enough for most realistic applications. This voltage regulator also has a fantastic power saving design and offers excellent thermal performance thanks to its improved thermal shut-down protection. Furthermore, it has an improved line/load regulation of 0.4% and temperature stability of 0.2%.

In summary, the UA78L12ACLPRE3 is a highly efficient and reliable linear voltage regulator integrated circuit. It has a wide range of applications such as for use in battery powered systems, general purpose supplies, or anywhere that a very low dropout voltage is required. Its features make it an ideal choice for many PMIC applications, due to its excellent power saving capabilities and its ability to output a steady and adjustable output voltage.

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