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BD33GC0WEFJ-E2 Voltage Regulator and Its Working Principle

The BD33GC0WEFJ-E2 is a 3-terminal adjustable volt regulator manufactured by Rohm Semiconductor which falls under the category of PMIC – Voltage Regulators – Linear. This range of linear regulator can adjust the output easily by varying the value of resistors connected to the adjustable terminal. It can deliver an output current of up to 1A and has a low dropout voltage at a maximum of 1.2V.

Applications

This device is suitable for various small appliance applications that require adjustable and low dropout voltage regulators. The most common applications, to name a few are: LED lighting, portable audio, data loggers, charging systems, solar power systems, electronic toys, small sensors and wearable electronic devices, etc. Moreover, it is also popularly used in automotive applications.

Features and Benefits

• The BD33GC0WEFJ-E2 is a low dropout (LDO) adjustable voltage regulator that delivers up to 1A of output current.
• It has an extremely low noise and a low quiescent current of 10 μA.
• It has a wide input range from 3V to 36V and a low dropout voltage of 1.2V maximum.
• It features an adjustable voltage source ideal for various applications.
• It is available in a small package of SOT-223 and can handle high temperature conditions of up to 150°C.

Working Principle

In a voltage regulator, the reference voltage is set depending on the resistors connected externally to the pins. So in the case of the BD33GC0WEFJ-E2, an adjustable voltage is provided at the output with the help of the resistors connected to its adjustment terminal. The output voltage can be changed with the variation of the resistors. This LDO regulator also has over-current protection. It features a current sense input pin which senses the voltage across the current sense resistor connected to the ground pin and the adjustment pin. The voltage sensed at the current sense pin will be compared with the reference voltage and the output will be accordingly regulated.

Conclusion

The BD33GC0WEFJ-E2 device is a linear adjustable voltage regulator designed by Rohm Semiconductor and comes under the category of PMIC – Voltage Regulators – Linear. It is an ideal device for various small appliance applications requiring adjustable and low dropout voltage regulators with up to 1A output current. It uses an external reference voltage as input to determine the output voltage which can be easily adjusted with the variation of resistors.

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