UA78L08CDR

The UA78L08CDR is a linear voltage regulator from Texas Instruments that is designed to control voltages in a range of 3V to 24V. It operates on a wide input voltage range of 8V to 36V and delivers regulated output currents up to 100mA. The outputs are resistant to transient load and thermal fluctuations and the output can be adjusted to a reference voltage of 1.25V, 1.5V, 1.8V, 2.5V and 3.3V. The device has low dropout, low ground current, low ripple rejection and excellent line regulation performance, while providing over-current and short-circuit protection.

Application Field

The UA78L08CDR is typically utilised in consumer, industrial and medical applications such as battery-powered equipment, 3V to 24V power supply systems, corded and cordless telephones, laptop and handheld computers and gaming systems. The device is also used in automotive applications such as automotive body systems and consumer electronics.

Working Principle

The working principle of the UA78L08CDR is based on the principle of Voltage Regulation. The device utilises the output current and dropout voltage of the regulator to keep the input voltage at a constant level. This is achieved through a circuitry of resistors, transistors, and zener diodes that keep the output at a specified level. The device also has an optional current limiting feature that allows it to limit the current flow to protect itself from overloads in current supply.

The UA78L08CDR regulates the output current over a wide input voltage range of 8V to 36V. It allows the output voltage to be adjusted to reference voltages of 1.25V, 1.5V, 1.8V, 2.5V and 3.3V with external resistors. The device also delivers a ground current that is much lower than other similar regulators, and it features a low dropout voltage, low ripple rejection and excellent line regulation performance.

Overall, the UA78L08CDR is a reliable, long-lasting and efficient linear voltage regulator. It is easy to use and setup and is suitable for a wide range of applications.