PQ20WZ1U

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PMIC – Voltage Regulators – Linear

The PQ20WZ1U is a linear voltage regulator from Panasonic, a established leader in the production of PMICs and other integrated circuits. This particular linear voltage regulator is designed for use in DC-DC voltage converter and AC-DC power supply systems. It offers low power dissipation, low voltage drop and high efficiencies even when operating at very small load currents and output voltages.

Applications

The PQ20WZ1U is used in a wide range of applications. Common examples include AC-DC adapters, DC-DC converters, battery powered systems and mobile devices, such as smartphones and laptops. This device is also suitable for automotive, consumer and industrial electrical systems as well as audio and video equipment.

Device Features

The PQ20WZ1U voltage regulator is a highly efficient device, with a typical efficiency of up to 80%. It offers low power dissipation and can operate in both step-down and step-up modes, from input voltages as low as 0.8V up to the maximum operating voltage of 16V. The device also features a high surge current protection circuit plus current limit and thermal shutdown protection for added safety. In terms of performance, the device can achieve output voltages as low as 0.8V for optimum power consumption and output currents up to 1.2A. The PQ20WZ1U has a very small form factor of just 8.3 x 9.2 mm and its package is compliant with lead-free soldering.

Working Principle

The PQ20WZ1U is a two-terminal electronic component that uses the principle of linear voltage regulation. The device consists of an internal voltage reference, an error amplifier, current-limiting circuitry and a power transistor. The internal voltage reference provides an accurate and stable output voltage, the error amplifier controls the current to the load and the current-limiting circuitry prevents excessive current from flowing through the device. The power transistor acts as a switch and regulates the voltage supplied to the load. The output voltage is then automatically adjusted by the error amplifier to match the output voltage of the reference.

The PQ20WZ1U also offers enhanced protection features such as over-temperature protection, short-circuit protection and overvoltage protection. The device also has an output voltage scale function which automatically adjusts the output voltage in response to changes in the input voltage. This allows the device to maintain a stable output voltage even when the input voltage fluctuates.

Conclusion

The PQ20WZ1U is a low power, high efficiency linear voltage regulator from Panasonic. The device offers low voltage drop and high efficiency when operating at very small loads and output voltages. It is used in a number of applications, from AC-DC adapters and DC-DC converters to automotive, consumer and industrial systems. The device features low power dissipation, step-up and step-down operation, surge current protection, current limit protection and thermal shutdown protection. It is also backed by an efficient working principle based on linear voltage regulation.

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