NJM78L12UA

NJM78L12UA belongs to the category of PMIC - Voltage Regulators - Linear. As a linear regulator, it converts input voltage to specific output voltage with low dropout voltage. The voltage output is adjustable and both inversion and amplification of input signal are available in linear voltage regulator applications.

The NJM78L12UA is designed to provide a full range of output current from 1mA to 1A and a full range of input voltage from 2.6V to 11V, with an adjustable output voltage from -12V to +12V. Its usual dropout voltage is 0.7V when the output current is low and 1.4V when the output current is high. It also has thermal shutdown function and short-circuit protection for safe operation.

NJM78L12UA has many application fields. It can be used in the automotive, industrial, communication, and consumer applications. For the automotive field, it is suitable to use in 12V power supplies and various car audio applications. For the industrial field, NJM78L12UA can be used as a power supply used to power industrial process control equipment. It can also be used as a regulator for microelectronics, electronic circuit power supplies or positive power supply. For communication field, NJM78L12UA is applied to reducing unnecessary noise for sensitive components in the communication system, such as power amplifiers, power dividers and filters. For the consumer applications, NJM78L12UA can be used in set-top box, Network Appliance, HDD, etc.

The working principle of the NJM78L12UA is based on the standard voltage regulator configuration. It uses a control element - MOSFET - to control the output voltage. The MOSFET closes or opens according to the error amplifier function which compares the output voltage with an internal reference voltage. When the output voltage is lower than the reference voltage, the MOSFET will open and allow more current to flow through. When the output voltage is higher than the reference voltage, the MOSFET will close and reduce the current flow. The output voltage can be adjusted through an external trim pot resistors. This method is more efficient and cost-effective than the more traditional regulators.

In conclusion, NJM78L12UA is an adjustable linear voltage regulator with the ability to supply 1A output current and a full range of input voltage from 2.6V to 11V. It can be used in a variety of application fields from automotive, industrial, communication to consumer applications. Its working principle is based on the standard voltage regulator configuration with MOSFET as the control element.