BD9123MUV-E2

Overview

The BD9123MUV-E2 is a synchronous buck DC-DC converter manufactured by ROHM Semiconductor. It operates within an input voltage range of 2.7 V to 5.5 V and provides a single adjustable output from 850 mV to 1.2 V at up to 1.2 A. The device features a fixed switching frequency of 1 MHz and low quiescent current of 10 uA. It is housed in a compact VQFN-16 package and supports operation temperatures from -40°C to +95°C.

Feature Summary

• Integrated synchronous rectification for high efficiency
• Fixed 1 MHz switching frequency for compact external component size
• Low standby current consumption for battery-powered applications

Applications

• Portable electronic devices requiring efficient power management
• Battery-operated systems with strict power constraints
• Embedded circuits needing stable low-voltage regulation

Procurement Notes

Verify the obsolete status before procurement as this part may be discontinued. Confirm availability through authorized distributors only. Check for valid RoHS compliance documentation. Ensure the specific suffix matches design requirements. Review end-of-life notifications for supply chain risks.

Selection Notes

Select this component for designs requiring a single low-voltage rail under 1.2 A. The 1 MHz frequency allows smaller inductors compared to lower-frequency alternatives. Verify that the 1.2 V maximum output meets load requirements. Consider thermal performance within the specified temperature range.

Part Context

This part belongs to the BD9123MUV series of step-down switching regulators. It is designed for general-purpose power management in portable electronics. The manufacturer focuses on integrating power switches to reduce board space.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data.