CAT6243-ADJMT5T3

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Introduction to CAT6243-ADJMT5T3

The CAT6243-ADJMT5T3 is a high-performance 3 terminal adjustable voltage regulator which is essentially current-based and was manufactured by CAT. It’s an adjustable, positive voltage regulator with current limiting capabilities and it was primarily designed for local linear voltage regulation applications. The device operates from an input voltage of 4V to 32V and produces an output voltage that is adjustable between 1.2V and 20V. The device features a temperature-compensated, 0.4% accuracy output voltage over a full temperature range of -40°C to 125°C.

Application Field and Working Principle

The CAT6243-ADJMT5T3 is ideal for a wide range of voltage regulation applications including personal computers, notebook computers, portable battery powered equipment, active power filter control, automotive, telecommunications and measuring instruments. As a linear regulator, it can provide a cost-effectively precise voltage regulation or constant current source over a wide range of conditions. The device is also an excellent general-purpose controller for short circuit protection or current limit control.

The CAT6243-ADJMT5T3 is an adjustable linear regulator which regulates its output voltage by sensing the voltage dropped across a power resistor. It requires a minimum input voltage differential of 2V and will provide a maximum output current of 5A. The CAT6243-ADJMT5T3 features an adjustable current limit and is able to monitor its output voltage against the voltage reference. The device also features overvoltage protection, reverse polarity protection, overcurrent protection and current-limiting shutdown.

The CAT6243-ADJMT5T3 has two modes of operation. The first mode is the normal, fixed dropout mode which is used for normal operation. In this mode, the dropout voltage of the device is fixed and the output voltage is determined by the output resistor value. The second mode is the current limiting mode, which is used to provide current limiter control to the device. In this mode, the output voltage is determined by the voltage reference and the maximum output current is limited by the current limit setting.

The CAT6243-ADJMT5T3 feature Thermal Shutdown (TSD) which enables the device to shut off in case of over temperature. The device also features a thermal warning flag output which indicates that the temperature has reached the Thermal Shutdown threshold. The thermal warning flag is useful to alert the user that the device is becoming over-temperature and corrective action is required.

The CAT6243-ADJMT5T3 also features Current Limiting which allows the user to set a current limit threshold. This can be used to protect the device from damage caused by an over-current condition. When the current limit threshold is exceeded, the device turns off to protect itself. This feature can be enabled by setting the current limit resistor to the proper value.

The CAT6243-ADJMT5T3 is also fast transient response, meaning that the output voltage can respond quickly to a change in input voltage. This is important for applications that require very accurate output voltage control over a wide range of conditions. The device can switch from off-state to full output voltage in as little as 1000ns.

In summary, the CAT6243-ADJMT5T3 is a 3 terminal adjustable voltage regulator designed for local linear voltage regulation applications. It features adjustable current limit and over-temperature protection, and is capable of fast transient response. The device is suited for a wide range of voltage regulation applications including personal computers, notebook computers, portable battery powered equipment, active power filter control, automotive, telecommunications and measuring instruments.

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