BD46382G-TR

Overview

The BD46382G-TR is a synchronous step-down DC/DC converter manufactured by Rohm Semiconductor. It integrates high-side and low-side N-channel MOSFETs to achieve high efficiency in compact designs. The device operates with an input voltage range of 2.7V to 5.5V, providing a programmable output voltage from 0.6V to 3.6V. It supports a maximum output current of 2A with a switching frequency selectable between 1MHz and 2.2MHz. Key features include integrated soft-start, overcurrent protection, and thermal shutdown.

Feature Summary

• Integrated synchronous rectification using internal N-channel MOSFETs for improved power efficiency.
• Programmable output voltage via external resistor divider network.
• Built-in protection mechanisms including overcurrent limiting and thermal shutdown.
• Flexible switching frequency selection to optimize component size and transient response.

Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems with single-cell lithium-ion inputs
• Embedded systems needing stable low-voltage rails

Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging when ordering. Confirm the exact pinout and thermal pad requirements against the official datasheet before PCB layout. Ensure compatibility with the intended input voltage range and load conditions. Check for any updated revision notes that may affect electrical characteristics or recommended operating conditions.

Selection Notes

Select this component for applications requiring a compact solution with high efficiency at moderate currents. Consider the trade-off between switching frequency and external inductor/capacitor size. Verify that the required output voltage falls within the supported range. Evaluate thermal performance based on expected ambient temperature and board copper area.

Part Context

This part belongs to Rohm's family of synchronous buck converters designed for portable electronics. It complements other models in the series offering different current ratings or input voltage ranges. The BD46382G-TR is specifically optimized for single-cell battery applications common in mobile devices.

Replacement Considerations

Check for direct pin-to-pin compatible alternatives from Rohm or other manufacturers if supply constraints exist. Ensure replacement parts match the input voltage range, output current capability, and package dimensions. Verify that control loop stability and protection features are comparable.

FAQ

What is the minimum output voltage supported by the BD46382G-TR?

The minimum output voltage is 0.6V, set by the internal reference voltage.

How is the switching frequency determined?

The switching frequency can be selected between 1MHz and 2.2MHz using an external resistor connected to the FB pin.