BD8312HFN-TR

Overview

The BD8312HFN-TR is a synchronous buck converter from ROHM Semiconductor, housed in an 8-HSON package. It supports an input voltage range of 3.5 V to 14 V and delivers an adjustable output voltage between 1.2 V and 12 V. The device provides up to 1 A output current with a switching frequency of 1.5 MHz. Operating temperature ranges from -25°C to +85°C, and quiescent current is 600 µA.

Feature Summary

• Integrates Pch/Nch synchronous rectification switches rated for 1.0 A and 15 V withstand voltage.
• Includes internal phase compensation components within the error amplifier circuit.
• Features built-in soft-start functionality and timer latch short protection circuits.

Applications

• Portable equipment powered by four dry batteries or lithium-ion cells
• General consumer electronics utilizing 5 V or 12 V fixed power supply lines

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status and specific packaging variants such as cut tape or reel options against official datasheets. Ensure thermal management requirements align with the HSON8 package specifications during integration.

Selection Notes

Select this regulator for applications requiring high efficiency and compact design due to its 1.5 MHz operation. Consider the 3.5 V minimum input voltage constraint when designing power stages. The integrated synchronous FETs reduce external component count compared to asynchronous alternatives.

Part Context

This part belongs to the BD8312 series of single-chip step-down switching regulators. It is designed to produce standard logic voltages like 1.2 V, 1.8 V, 3.3 V, or 5 V from higher input sources. The series emphasizes small footprint solutions for portable devices.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.