BD9161FVM-TR

Overview

The BD9161FVM-TR is a synchronous buck switching regulator manufactured by ROHM Semiconductor, designed for high-efficiency step-down conversion. It operates with an input voltage range of 2.5 V to 4.5 V and provides an adjustable output voltage from 1 V to 3.3 V. The device delivers a maximum output current of 600 mA with a fixed switching frequency of 1 MHz. Key electrical specifications include a typical quiescent current of 10 uA and an operating supply current of 200 uA. It functions within a temperature range of -25°C to +85°C and is housed in an MSOP-8 package.

Feature Summary

• Implements current mode PWM control for rapid transient response during load changes
• Integrates synchronous rectification using Nch/Pch FETs to maximize efficiency across the load spectrum
• Includes built-in protection mechanisms such as thermal shutdown, UVLO, and timer latch short-circuit protection
• Features a dedicated shutdown pin that reduces operating current to approximately 0 uA

Applications

• Portable electronic devices requiring efficient power management from single-cell battery sources
• Embedded systems utilizing 3.3V or 5V input rails to generate lower logic voltages
• Industrial control modules operating within standard commercial temperature ranges

Procurement Notes

Verify component authenticity through authorized distributors due to the NRND status. Confirm package integrity upon receipt, as the MSOP-8 form factor requires precise handling. Ensure design compliance with the specified -25°C to +85°C operating limits. Cross-reference datasheet revisions to confirm pinout consistency before finalizing PCB layouts.

Selection Notes

Select this component when input voltages remain between 2.5 V and 4.5 V and output currents do not exceed 600 mA. It is suitable for designs prioritizing low quiescent current and compact footprint over higher power delivery. Consider alternative models if operation below -25°C or above +85°C is required, or if programmable switching frequencies are necessary for EMI optimization.

Part Context

This part belongs to the BD91xx series of synchronous buck converters from ROHM. These regulators utilize proprietary pulse skipping modes and synchronous rectification to achieve high efficiency. The series targets applications needing reliable step-down conversion in space-constrained environments, offering integrated protection features to enhance system robustness without external components.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official ROHM resources for direct replacements or evaluate similar synchronous buck regulators with compatible input/output voltage ranges and current capabilities.