BD9B300MUV-E2

Overview

The BD9B300MUV-E2 is a single synchronous buck DC/DC converter manufactured by ROHM Semiconductor. It features an integrated MOSFET and operates within an input voltage range of 2.7 V to 5.5 V, delivering a maximum output current of 3 A. The adjustable output voltage spans from 800 mV to 4.4 V. The device supports a switching frequency between 1 MHz and 2 MHz and maintains a low quiescent current of 10 uA. It is housed in a VQFNV3030-EP-16 package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a synchronous buck topology with an internal power MOSFET for compact design.
• Supports high-frequency operation with adjustable switching rates up to 2 MHz.
• Provides ultra-low standby consumption with a typical quiescent current of 10 uA.
• Includes comprehensive protection mechanisms such as over-current and thermal shutdown.

Applications

• Portable consumer electronics requiring efficient step-down conversion
• Battery-powered mobile devices and handheld gadgets
• Embedded systems with strict power budget constraints
• IoT modules and sensor nodes needing low quiescent current

Procurement Notes

Verify the exact suffix E2 confirms RoHS compliance and lead-free status per manufacturer specifications. Confirm the package variant matches the VQFNV3030-EP-16 footprint requirements for your PCB layout. Ensure the input voltage source remains within the 2.7 V to 5.5 V operational window to prevent undervoltage lockout or damage. Cross-reference the thermal performance data against your specific ambient conditions and board copper area to guarantee reliable operation within the specified temperature range.

Selection Notes

Select this component when a balance of moderate output current (3 A) and low static power consumption is required. It is suitable for applications where space is limited due to its small VQFN package. Consider alternatives like the BD9B400MUV-E2 if higher current capacity is needed, or the BD9B500MUV-E2 for even greater load capabilities. Evaluate the need for adjustable switching frequencies above 1 MHz to optimize external component sizes.

Part Context

This part belongs to the BD9B series of single-channel synchronous buck converters from ROHM Semiconductor. The series is designed for portable applications, offering integrated power switches to reduce external component count. The BD9B300MUV-E2 specifically targets the mid-range current segment, bridging the gap between lower-current models and higher-power variants within the same family architecture.

Replacement Considerations

BD9B400MUV-E2 offers higher current capacity (4.5 A). BD9B500MUV-E2 provides increased output current (5 A). BD9A300MUV-E2 is a similar 3 A model but may have different electrical characteristics.

FAQ

What is the minimum output voltage supported by the BD9B300MUV-E2?

The minimum adjustable output voltage is 800 mV.

Does the BD9B300MUV-E2 include built-in protection features?

Yes, it includes over-current protection, short-circuit protection, and thermal shutdown protection.