BU28UA3WNVX-TL

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

The BU28UA3WNVX-TL is a single-output fixed low-dropout (LDO) voltage regulator manufactured by ROHM Semiconductor. It provides a fixed output voltage of 2.8 V with a maximum output current of 300 mA. The device operates within an input voltage range of 1.7 V to 5.5 V and features a typical dropout voltage of 200 mV, with a maximum of 220 mV. It exhibits a typical power supply rejection ratio (PSRR) of 70 dB. The regulator has a quiescent current of 50 uA and supports operation from -40 C to +85 C. It is housed in a DFN-4 surface-mount package.

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

• Provides stable regulated power for sensitive electronic circuits using CMOS LDO technology.
• Maintains consistent output voltage under varying load conditions with low dropout characteristics.
• Offers high noise immunity through significant ripple rejection capabilities.

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

• Powering portable consumer electronics requiring efficient linear regulation
• Supplying power to microcontrollers and digital logic circuits
• Battery-powered devices needing extended operational life due to low quiescent current

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

Verify the component status before procurement as it is marked NRND (Not Recommended for New Designs). Confirm that the DFN-4 package dimensions match your PCB footprint requirements. Ensure the 2.8 V fixed output aligns with your system voltage needs. Check RoHS compliance documentation if required for your manufacturing process. Review the datasheet for thermal dissipation limits given the 560 mW power dissipation rating.

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

Select this component when a fixed 2.8 V output is required with up to 300 mA load capability. Consider its low quiescent current for battery-operated applications where efficiency is critical. Evaluate the 200 mV typical dropout against your minimum input voltage constraints. Compare the 70 dB PSRR against noise sensitivity requirements of downstream components. Verify compatibility with the DFN-4 package for your assembly line.

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

This part belongs to the BU28UA3WNVX series of low-dropout regulators from ROHM Semiconductor. It is categorized under PMIC - Power Management ICs. The series includes various fixed output voltages tailored for different power supply needs. The DFN-4 package allows for compact board designs. It is distinct from other series like BU20 or BU22 which offer different output currents or voltages.

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

Check for direct substitutes within the same series offering different fixed voltages if 2.8 V is not suitable. Verify pin-to-pin compatibility with other DFN-4 LDOs from ROHM or competitors. Ensure replacement parts maintain similar dropout voltage and PSRR specifications. Confirm that alternative components are not also marked as obsolete or NRND.