AN78L04M

The AN78L04M is a linear voltage regulator optimized for applications powered from either a single or two-cell battery. It offers high efficiency and superior protection features such as reverse polarity protection, short circuit protection and thermal shutdown. This product also features a low quiescent current for better power management. It is suitable for battery powered applications such as cellular phones, PDAs and portable medical instruments where an efficient and reliable power supply is needed.

The AN78L04M is a low power monolithic linear voltage regulator, designed to provide a fixed output voltage of 3.3V with a maximum output current of 1A. It is ideal for applications powered from a single or two-cell battery where ultra-low quiescent current, high efficiency and superior protection features are required. It features an input voltage range of 2.7V to 6.0V, which allows for operation from a single-cell Li-Ion or two-cell non-rechargeable battery. The device offers a wide operating temperature range of -40°C to +85°C and has an internal thermal shutdown protection. Additionally, it offers reverse polarity protection and a current limit of 1A. This makes the device suitable for a variety of portable applications including cellular phones, PDAs, portable navigation systems and medical instruments. Additionally, the device is available in a small SOT-23 packaged option, allowing for direct mounting on a PCB.

The AN78L04M works by regulating the output voltage to a precise value set by an external resistor divider. An integrated error amplifier senses the output voltage and compares it to an internal reference voltage, to ensure that the set voltage is maintained. When the input voltage is lower than the set voltage, the linear regulator operates in a regulation or feedback mode. When the input voltage is higher than the set voltage, the regulator will enter the inversion mode, forcing the base-emitter of the pass transistor to ground and drawing virtually no current from the input source. The device includes an internal protection limit, which limits the output current to 1A and provides short-circuit and thermal protection. Additionally, the device includes reverse polarity protection, which protects the device from damage if the input voltage polarity is reversed.

The AN78L04M is a low power monolithic linear voltage regulator, designed to provide an easily regulated, fixed output voltage of 3.3V with a maximum output current of 1A. It is suitable for applications powered from a single or two-cell battery, such as cell phones, PDAs and medical instruments, where an efficient and reliable power supply is needed. It features an ultra-low quiescent current, wide operating temperature range and a slew of protection features, including reverse polarity protection and current limit of 1A. The device works by regulating the output voltage to a precise value set by an external resistor divider and includes an internal protection limit to provide short-circuit and thermal protection. Additionally, the device is available in a small SOT-23 package, allowing for direct mounting onto a PCB.