BD33HC5MEFJ-ME2

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PMIC - Voltage Regulators - Linear

A linear voltage regulator is a device that regulates the voltage of an electrical circuit by using three or four terminal devices. It works by using a few components such as resistors, transistors, or other semiconductor devices to reduce the voltage in the circuit. The BD33HC5MEFJ-ME2 is a Linear voltage regulator from STMicroelectronics.

Application Field

The BD33HC5MEFJ-ME2 application field covers a wide range of electronic products. It is suitable for power supplies, portable medical and industrial equipment, automotive applications, and battery-powered products. It can be found in applications such as smartwatches, music players, handheld games, mobile phones and household appliances.

Working Principle

The BD33HC5MEFJ-ME2 employs a three-terminal adjustable voltage regulator to provide precise voltage regulation. Its on-chip power transistor, active power dropping resistors, and logic control circuit regulate the output voltage. The output voltage is set by two external resistors that are connected between one of the adjustment pins and the output voltage pin. When the output voltage changes, the internal control circuit will automatically adjust the output voltage to ensure that the output matches the required value.

The BD33HC5MEFJ-ME2 uses a current-mode regulation technique. It senses the voltage drop across the series power control transistor to regulate the output voltage. This technique allows for current-mode power supply operation, which provides excellent transient response. The voltage regulator will be able to respond quickly to changes in output voltage due to a sudden load change or a short-circuit situation.

The BD33HC5MEFJ-ME2 also provides protection against over-voltage, over-current, and overheating. It has an on-chip thermal shutdown circuit that protects the device by shutting off the output if the die temperature exceeds a given threshold. The overcurrent protection circuit limits the maximum output current to a safe level. An internal band-gap reference voltage is employed to provide a constantly stabilized output voltage to the output pin.

Conclusion

The BD33HC5MEFJ-ME2 is a linear voltage regulator from STMicroelectronics that is suitable for a wide range of applications. It is ideal for power supplies, portable medical and industrial equipment, automotive applications, and battery-powered products. The device utilizes a current-mode regulation technique and provides protection against over-voltage, over-current, and overheating. This makes the BD33HC5MEFJ-ME2 a reliable and robust voltage regulator for a variety of applications.

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