BD91361MUV-E2

Overview

The BD91361MUV-E2 is a synchronous buck converter from ROHM Semiconductor, designed for efficient step-down voltage regulation. It operates with an input voltage range of 2.7 V to 5.5 V and provides a single adjustable output between 800 mV and 3.3 V. The device supports up to 4 A of output current and integrates a power MOSFET rated at 2 A. Key electrical parameters include a switching frequency of 1 MHz, a quiescent current of 10 uA, and a supply current of 250 uA. It functions within a temperature range of -40°C to +105°C and utilizes a VQFNV4040-EP-20 package.

Feature Summary

• Integrates a high-efficiency synchronous rectification circuit with an internal power MOSFET for compact design.
• Utilizes current mode control architecture to ensure rapid transient response during load changes.
• Features a shutdown function to minimize power consumption when the system is inactive.
• Supports pulse skipping operation in light-load conditions to maintain high efficiency across varying loads.

Applications

• Portable electronic devices requiring efficient power management from USB or battery sources
• Embedded systems utilizing 5V or 3.3V input rails
• Industrial control modules operating in extended temperature environments

Procurement Notes

Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm compliance with RoHS directives and material declarations. Ensure the ordering part number matches the required tape and reel configuration for automated assembly processes. Cross-reference the VQFNV4040-EP-20 footprint dimensions with your PCB layout guidelines before finalizing procurement decisions.

Selection Notes

Select this component when a single output channel is sufficient for the target application. The 4 A output capability exceeds the integrated 2 A MOSFET rating, so thermal management and external inductor selection must support the higher current demand. Compare input voltage requirements against the 2.7 V minimum limit to ensure compatibility with the system power source.

Part Context

This device belongs to the BD91361MUV series of switching regulators. It shares the VQFNV4040-EP-20 package form factor with other members of the family, such as the BD9141MUV-E2 and BD9151MUV-E2. However, it is distinct in its lower input voltage range and higher output current capacity compared to similar models in the same product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility and electrical specifications with alternative suppliers if sourcing constraints require substitution.