FT533DA

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FT533DA, classified as PMIC - Voltage Regulators - Linear, is a high performance low voltage regulator that offers high accuracy, low noise and low power consumption. The device can be used to regulate the output of a battery or AC adapter, or as an adjustable voltage reference, enabling precise voltage control and regulation.

Application Field

FT533DA is suitable for portable products such as Portable Medical and Wearable Devices, Smart Meters, and Industrial Automation systems. It is also used in applications that require precise control of output voltage for system power supply. FT533DA is widely used in various applications, such as telecommunications, computers, consumer electronics, automotive, and industrial markets.

Working Principle

FT533DA is a linear voltage regulator, which uses an external error amplifier to control the output voltage. This error amplifier senses the output voltage and compares it to the reference voltage. Then the error amplifier controls the output voltage by adjusting the base voltage for the external regulator. This allows for precise control of the output voltage within a certain range.

The output voltage can be adjusted with a single-ended input voltage or an external voltage divider. In the single-ended input voltage mode, the output voltage can be adjusted by applying a positive control voltage to the FT533DA control pin. In the voltage divider mode, the external voltage divider is used to adjust the output voltage.

FT533DA also features internal current limit. The current limit feature limits the maximum current while supplying power to the device by sensing the voltage across the current sense resistor. This eliminates the need for an external current limit circuit, providing an extra layer of protection for the device.

FT533DA also incorporates a thermal protection circuit. It senses the temperature of the regulator and shuts off the output voltage if it exceeds the Thermal Protection Threshold (TPT). This helps to protect the regulator from thermal overload.

The FT533DA is an excellent choice for applications that require precise control of output voltage and low noise operation. It is available in both fixed output voltage and adjustable output voltage versions, allowing for flexibility in design and implementation.

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