BD9A101MUV-LBE2

Overview

The BD9A101MUV-LBE2 is a synchronous buck DC/DC converter from ROHM Semiconductor, designed for industrial applications. It operates with an input voltage range of 2.7V to 5.5V and delivers a maximum output current of 1A. The adjustable output voltage spans from 0.8V to 3.85V. Key electrical specifications include a switching frequency setting of up to 1MHz and a typical quiescent current of 10µA. The device integrates the controller and power MOSFETs in a compact VQFN016V3030 package (3.0x3.0mm) featuring a backside heat dissipation pad.

Feature Summary

• Integrates SLLM™ control for optimized efficiency during light load conditions.
• Includes comprehensive protection mechanisms such as over-current, short-circuit, thermal shutdown, and under-voltage lockout.
• Features an adjustable soft-start function to limit inrush current during startup.
• Provides a Power Good (PGOOD) output signal for system status monitoring.

Applications

• Industrial control systems requiring long-term component support
• Embedded systems powered by single-cell lithium batteries or 5V rails
• Portable electronic devices needing efficient step-down conversion

Procurement Notes

Verify the specific suffix 'LBE2' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Confirm that the 'NRND' (Not Recommended for New Designs) status does not impact your existing production requirements. Ensure the ordering quantity matches the standard taping packaging quantity of 3000 units per reel. Check for any alternative lead-free variants if environmental compliance is critical.

Selection Notes

Select this component when a compact, high-efficiency solution is needed for low-to-medium current loads within a 5.5V input limit. The integrated MOSFET design reduces external component count compared to discrete solutions. Consider the 1MHz switching frequency for smaller passive components. Evaluate the thermal performance of the VQFN package based on your PCB copper area, as the backside pad aids heat dissipation but requires proper layout.

Part Context

This part belongs to the BD9A100 series of synchronous buck converters. It shares architectural similarities with the BD9A100MUV-E2 but may differ in specific feature sets or packaging details. The series is characterized by its integration of control logic and power stages, targeting space-constrained designs. Other variants in the family, such as the BD9A301, offer higher current capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult the manufacturer's official cross-reference tools or contact technical support directly for verified alternatives. Do not assume functional equivalence with other ROHM buck converters without verifying pinouts and electrical parameters.