LT1963AET#PBF

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The LT1963AET#PBF is an adjustable linear voltage regulator. It belongs to the category of PMIC (Power Management Integrated Circuits) and is part of the Voltage Regulator-Linear subcategory. It provides a wide range of input and output voltage with five different fixed output voltages and adjustable output voltage features ranging from 1.2V to 18V. This voltage regulator has a high accuracy of 1% and minimum output current of 600mA which makes it ideal for power management applications for computing and consumer devices.

The LT1963AET#PBF is available in a surface-mount, thermally enhanced SOT-223 package. It\'s ideal for use in battery-operated or less-than-ideal power supplies, such as those found in computers or consumer electronics. Additionally, inductor-free configurations are available which reduce parts count and simplify designs.

Features

• Input voltage range: 1.3V to 45V

• Fixed output voltage versions available: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V

• Adjustable output voltage range: 1.2V to 18V

• Maximum output current: 600mA

• Output voltage accuracy: ±1%

• Internal thermal shutdown protection

• Internal current and thermal limits

• SOT-223 packages available with thermal pad for improved power dissipation

Applications

• High accuracy power supplies

• Computers and consumer electronics

• Battery powered equipment

• Data communication equipment

• Portable medical, test and measurement equipment

Working Principle

The LT1963AET#PBF is designed to provide a highly accurate, linear voltage regulation output over a wide input supply voltage range. It is powered by a free-running internal oscillator and can operate in both voltage and current regulation modes.

The internal oscillator is set to a default frequency of approximately 200kHz and this can be adjusted with an external resistor and capacitor. The internal clock frequency is essential for providing accurate output management in the presence of large transients such as load or input supply voltage changes.

The adjustable LT1963AET#PBF has an enable pin to enable the output voltage or disable it for improved efficiency. The output voltage is set with two external resistors and the enable pin can be used for on/off control. The device also provides an internal approach circuit to protect the device from large load-transient spikes.

The LT1963AET#PBF operates in either current or voltage regulation modes. Under normal conditions, the device operates in voltage regulation mode and adjusts the output voltage levels as the output load current changes. In current regulation mode, the device maintains a constant current source regardless of output voltage changes or transients at the output.

Conclusion

The LT1963AET#PBF is a linear voltage regulator ideal for power management applications such as computers and consumer devices. It provides high accuracy, adjustable output voltages and a wide input voltage range. Additionally, it offers inductor-free configurations, an internal thermal shutdown protection, and an enable pin for on/off control. This voltage regulator also is able to operate in either voltage or current regulation modes.

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