BA33BC0WFP-E2

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The BA33BC0WFP-E2 with feature of wide-input voltage range and high integration is a linear voltage regulator with excellent performance from Rohm, specified for low-power system solutions. It has an internal power supply circuit and an internal micro-controller subcircuit. There are two operating modes, standard mode and reverse polarity mode.

Application Field

BA33BC0WFP-E2 provides stable output voltage and current for most of the low-power digital circuits, such as 5V and 3.3V voltage and 0.5A current system solutions, like single chip Bluetooth and WLAN. Due to its excellent performance, BA33BC0WFP-E2 is widely used in automotive, communication and industrial applications, such as motor control systems, switching power supplies, and security systems.

Working Principle

The BA33BC0WFP-E2 is a fixed output voltage regulator including a voltage reference, an error amplifier, an internal control logic and a power MOS FET. It works in two modes: standard mode and reverse polarity mode. The reference voltage can be adjusted by a resistive divider. The error amplifier compares the output voltage to changes in the reference voltage and adjusts the MOS FET duty cycle to maintain the output voltage.

In standard mode, the chip is powered by the input voltage, Vin, on its non-inverting input terminal, and the output voltage is regulated by comparing the feedback voltage to the reference voltage. The control logic includes under-voltage lockout (UVLO) and short-circuit protection (SCP) to prevent the dropout voltage from exceeding the protection level.

In reverse polarity mode, the chip is powered by the output voltage and regulated by the voltage reference. Under-voltage lockout and short circuit protection are still active in the reverse polarity mode. In this mode, a negative input voltage is required. The chip can also be operated with a single cell battery,providing further enhanced stability of the voltage.

Conclusion

The BA33BC0WFP-E2 is a linear voltage regulator with wide-input voltage range and high integration, which is specified for low-power system solutions. It is widely used in automotive, communication, and industrial applications due to its excellent performance. It has two operating modes: standard mode and reverse polarity mode. To make BA33BC0WFP-E2 works well, undervoltage lockout and short circuit protection should be considered.

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