L78LR05EL-TL-E

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The L78LR05EL-TL-E is an advanced linear voltage regulator with an adjustable output voltage, high output current capability and low external parts count. In terms of application fields and working principle, the L78LR05EL-TL-E belongs to the category of PMIC (Power Management ICs) - Voltage Regulators - Linear.

The L78LR05EL-TL-E is typically used in Automotive, Computing and Storage and Industrial applications requiring servo motors and precision control loops. Wide input voltage range of 4.5V to 18V, allows the L78LR05EL-TL-E to be applicable to a variety of sources ranging from car batteries, to AC adapters. The output voltage can be adjusted from 0.8V to 3.2V. The device provides up to 18A peak capability and a steady output current of up to 5A.

The working principle of the L78LR05EL-TL-E is based on a voltage regulator feedback loop. This feedback loop works by comparing the output voltage to the reference voltage and taking corrective action to maintain the output voltage close to the reference voltage.

The L78LR05EL-TL-E operates in a PWM buck topology and is equipped with an integrated buck switch which can be enabled/disabled via an external pin. Shut down mode, power good signal and soft start provide a complete control of the power supply.

The device comprises a reference voltage, shunts, error amplifier, signal from the error amplifier and output comparators. The reference voltage source provides a constant set point for the output voltage. The shunts are used to sense the current flowing through them, providing an output voltage proportional to the current. The error amplifier takes the output voltage and compares it to the reference voltage, generating a signal proportional to the difference between the two. This signal is used to control the buck switch, allowing it to respond to any deviations from the set output voltage. Finally, the output comparators are used to compare the output voltage to the reference voltage, triggering the buck switch to shut down at higher voltages.

In summary, the L78LR05EL-TL-E is a linear voltage regulator that is typically used in a variety of Automotive, Computing and Storage and Industrial applications. It is a PMIC (Power Management IC) - Voltage Regulators - Linear, with a feedback loop based on a voltage regulator. It is equipped with an integrated buck switch, shut down mode, power good signal and soft start. Its output voltage can be adjusted from 0.8V to 3.2V and it has a wide input voltage range of 4.5V to 18V.

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