LM78L15ACZ/LFT4

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The LM78L15ACZ/LFT4 is a linear voltage regulator that belongs to the family of PMIC (Power Management and Integration Circuitry) voltage regulators. It is a voltage regulator that can provide output voltages from 1.5 volts to 15 volts in fixed output or adjustable output configurations. It is ideal for small and medium-power designs for a variety of applications.

The LM78L15ACZ/LFT4 is a three-terminal linear adjustable regulatordevice. It maintains a constant preset output voltageregardless of input voltage variations, temperature changes, or loadvariations. The device has a wide input voltage range of 3 V to 26 V and comes with one load-sharing output with a peak current capability of up to 1A. The device has an active low enable input which enables user-defined power savings and reduces power load loss. Additionally, its output current limit is set externally via a sense resistor which ensures reliable operation.

LM78L15ACZ/LFT4 operates over an extended ambient temperature range of –40°C to +125°C. These features make the device suitable for a broad range of automatic-load sharing and automotive applications such as battery-operated portable devices, DC-DC converters, and distributed power systems in automotive, as well as telecom, industrial, and consumer applications.

The device is adjustable with an external resistor divider. The user can set the output voltage within a range of ±2.5% accuracy to compensate for the current drift effect caused by changes in device temperature. The device also features an over-voltage crowbar latch protection and thermal shutdown.

The LM78L15ACZ/LFT4 device uses a voltage feedback loop to regulate the output voltage. It compares the actual output voltage to the voltage reference, which is set with a small external resistor divider. If the load current increases or if the input voltage decreases, the output voltage will decrease in order to keep the output voltage constant. This mechanism helps to maintain a steady output voltage even under varying input voltages and load currents.

The LM78L15ACZ/LFT4 device comes in a TO-220 package for surface mounting and an easy-to-mount TO-263 package for ample thermal dissipation. The device is lead-free and halogen-free compliant, making it a suitable choice for energy-efficient products.

In conclusion, the LM78L15ACZ/LFT4 is an excellent choice for regulating a low-power supply for applications such as battery-operated portable devices, DC-DC converters and distributed power systems. Its features such as adjustable output voltage, wide input voltage range, and over-voltage crowbar latch protection, make it a reliable and energy-efficient device.

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