CAT6243-ADJCMT5T

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CAT6243-ADJCMT5T is a 5A, P-channel MOSFET linear adjustable voltage regulator produced by Connected Components Solutions (CCS). It belongs to the PMIC – Voltage Regulators – Linear category. This product is a highly economical, low quiescent current solution for a wide range of applications.

The CAT6243-ADJCMT5T can be used to provide both direct and inverted output from 0.8V to 6V. The maximum output current of this regulator is 5A. It can output a voltage that is adjustable with a range of 0.4V to 6V. The voltage of the output can be adjusted with a single 10kΩ external resistor. This regulator offers low quiescent current of just 6μA, making it highly economical for various applications.

CAT6243-ADJCMT5T offers good transient response, fast startup and excellent line regulation that ensures stable output even at high line and load conditions. It also has a Dropout voltage of 0.1V at its maximum output current, and an output Noise Reduction Circuit (NRC) to reduce high-frequency noise.

The CAT6243-ADJCMT5T is an ideal solution for different types of applications. It is commonly used in personal electronics such as mobile phones, digital cameras, and tablet computers. It can also be used in automotive and industrial equipment, as well as in medical devices.

The principle of operation of CAT6243-ADJCMT5T is based on a linear voltage drop that occurs across a P-channel MOSFET configured as a series regulator. The circuit consists of a resistor divider network, an error amplifier, a MOSFET, a voltage reference and a feedback control loop.

The resistor divider network consists of two resistors (R1 and R2) connected in series from the input voltage to ground. This network divides the input voltage into two fractions and provides two reference voltages at the junction of the resistors for the error amplifier.

The error amplifier is a differential amplifier whose input is the reference voltage and output is connected to the gate of the MOSFET. The amplifier amplifies the difference between the reference voltage and the feedback voltage and controls the gate voltage of the MOSFET according to the reference voltage.

The MOSFET is connected as a series regulator in the circuit. The MOSFET acts like a switch, allowing the current to flow in the path from input to output when the gate voltage is higher than the input voltage. This means that the output voltage will be regulated at a certain level.

The voltage reference is used to provide a reference voltage for the error amplifier. Generally, an LM431 series precision shunt regulator is used for this purpose. This reference voltage is compared with the feedback voltage and the difference is amplified by the error amplifier.

The feedback control loop consists of two resistors (R3 and R4) connected between the output voltage and the input of the error amplifier. The feedback voltage is proportional to the output voltage and is compared to the reference voltage. When the output voltage increases, the error amplifier reduces the gate voltage of the MOSFET and limits the current, thus maintaining the output voltage at a constant level.

In summary, the CAT6243-ADJCMT5T is an ideal choice of regulator for a wide range of applications. It provides low quiescent current, fast transient response, and good line regulation. It is relatively inexpensive and easy to use, making it a popular choice for many applications.

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