BU33SA4WGWL-E2

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The BU33SA4WGWL-E2 is a single-output fixed positive CMOS LDO voltage regulator manufactured by ROHM Semiconductor. It provides a fixed 3.3 V output with a maximum load current of 200 mA. The device operates within an input voltage range of 1.7 V to 5.5 V and features a typical power supply rejection ratio (PSRR) of 70 dB. It exhibits a low dropout voltage of 80 mV at rated load, with a maximum of 150 mV. Line regulation is specified at 2 mV, and load regulation at 4 mV. The unit is housed in a WLCSP-4 package and supports operation from -40 °C to +85 °C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Provides stable regulated voltage via a fixed 3.3 V output configuration
• Delivers up to 200 mA continuous load current capability
• Maintains high noise immunity through 70 dB typical PSRR performance
• Operates efficiently with minimal voltage drop under load conditions

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Portable electronic devices requiring compact power management
• Battery-powered systems needing efficient linear regulation
• Embedded circuits utilizing single-supply architectures

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the complete part number including the suffix E2 for lead-free compliance and environmental specifications. Confirm the WLCSP-4 package type matches your PCB footprint requirements. Ensure input voltage constraints between 1.7 V and 5.5 V align with your system design. Check thermal dissipation limits relative to ambient operating temperatures within the specified range.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a small form factor is critical due to its WLCSP-4 packaging. Choose this regulator for applications requiring a fixed 3.3 V rail with moderate current demands up to 200 mA. Consider its low dropout characteristics for battery-operated systems where maximizing headroom is essential. Verify that the required line and load regulation specs meet your circuit sensitivity needs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This component belongs to the BUxxSA4WGWL series of low-dropout regulators from ROHM Semiconductor. These devices are designed as CMOS-based solutions for portable electronics. The series emphasizes miniaturization and efficiency, targeting applications where space and power consumption are primary constraints. The specific model denotes a fixed 3.3 V output variant within this family.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Check for other variants within the BUxxSA4WGWL series offering different fixed voltages or current ratings if system requirements change. Verify pin-compatible alternatives from ROHM's broader LDO portfolio that maintain the WLCSP-4 package style.