BU28SA4WGWL-E2

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

The BU28SA4WGWL-E2 is a single-output fixed low-dropout (LDO) linear regulator manufactured by ROHM Semiconductor. It provides a fixed output voltage of 2.8 V with a maximum output current of 200 mA. The device operates within an input voltage range of 1.7 V to 5.5 V and features a typical dropout voltage of 80 mV at 100 mA, with a maximum of 150 mV. It offers high power supply rejection ratio (PSRR) of 70 dB and maintains voltage regulation accuracy within ±0.6%. The IC includes shutdown functionality and thermal protection, operating reliably from -40°C to +85°C in a compact WLCSP-4 package.

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

• Integrates shutdown control for active power management
• Provides high ripple rejection for clean power delivery
• Includes built-in thermal shutdown for operational safety

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

• Power supply for logic integrated circuits
• RF circuit power sources
• Camera module power systems

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

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm compliance with current environmental standards and pin compatibility. Ensure the ordering code matches the required fixed output voltage variant. Confirm that the UCSP50L1 package dimensions align with the target PCB footprint before finalizing procurement orders.

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

Select this component when a stable 2.8 V rail is required for sensitive analog or digital loads. The low quiescent current and small form factor make it suitable for space-constrained portable designs. Verify that the load current does not exceed 200 mA and that the input voltage remains within the specified 1.7 V to 5.5 V window for proper regulation.

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

This part belongs to the BUxxSA4 series of CMOS LDO regulators from ROHM. The series is characterized by low noise, fast transient response, and minimal standby current. These regulators are designed for applications requiring precise voltage levels in compact surface-mount packages, serving as efficient power management solutions for modern electronic devices.

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

Direct substitutes include other parts from the same family with different fixed output voltages, such as BU25SA4WGWL-E2 (2.5 V) or BU30SA4WGWL-E2 (3.0 V), provided the system design accommodates the voltage difference. Ensure any replacement maintains the same WLCSP-4 footprint and electrical characteristics.