BD9139MUV-E2

Overview

The BD9139MUV-E2 is a single-channel step-down DC-DC converter manufactured by ROHM Semiconductor. It operates with an input voltage range of 4.5 V to 13.2 V and provides a maximum output current of 2 A. The device supports adjustable output voltages between 2.5 V and 6 V. It features a fixed switching frequency of 500 kHz and a typical quiescent current of 10 µA. The component functions within an operating temperature range from -40 °C to +105 °C and is housed in a VQFNV4040-EP-20 package.

Feature Summary

• Integrates synchronous rectification for high efficiency across load ranges
• Utilizes constant on-time control architecture for rapid transient response
• Incorporates Simple Light Load Mode (SLLM) to minimize standby power consumption
• Includes comprehensive protection mechanisms such as thermal shutdown and overcurrent protection

Applications

• Portable electronic devices requiring efficient battery-powered operation
• Industrial equipment utilizing 5V or 12V bus architectures
• Embedded systems needing compact, high-efficiency power regulation solutions

Procurement Notes

Verify the specific suffix E2 for environmental compliance status before procurement. Confirm availability as distribution data indicates potential supply constraints. Ensure the VQFNV4040-EP-20 package footprint matches the design layout. Validate that the application does not require automotive-grade certification, as this part is designated for standard industrial use.

Selection Notes

Select this component when a 2 A output current is required from a 4.5 V to 13.2 V input source. The 500 kHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the wide operating temperature range for environments subject to significant thermal variations. Ensure the design accommodates the specific thermal requirements of the VQFNV4040-EP-20 package.

Part Context

This part belongs to the BD9139 series of synchronous buck converters designed for general-purpose power management. It serves as a solution for applications demanding high efficiency and fast transient response within a compact form factor. The series is distinct from automotive-specific variants and focuses on standard industrial and consumer electronics performance metrics.

Replacement Considerations

BD91390MUV-E2 is listed as a recommended alternative in distributor catalogs. Verify pin compatibility and electrical specifications against the original design requirements before substitution.