BD8313HFN-TR

Overview

The BD8313HFN-TR is a synchronous buck converter IC from ROHM Semiconductor, designed for high-efficiency power conversion. It operates with an input voltage range of 3.5 V to 14 V and provides a single adjustable output voltage between 1.2 V and 12 V. The device supports a maximum output current of 1.2 A and integrates internal FETs for the synchronous rectification topology. It functions at a switching frequency of 1.0 MHz, enabling the use of compact external components. The IC includes built-in phase compensation, soft-start circuits, and timer lock short-circuit protection. It is housed in an HSON-8 package and operates within a temperature range of -25 °C to +85 °C.

Feature Summary

• Integrates synchronous rectification switches and controller on a single chip for efficient step-down conversion.
• Features a flexible phase compensation system allowing easy configuration with a wide range of external constants.
• Includes built-in soft-start circuitry and timer lock short-circuit protection for enhanced reliability.

Applications

• Power supply generation from battery sources such as four batteries or two/three lithium-ion cells.
• Voltage regulation from fixed 5 V or 12 V power rails.
• Generating standard logic voltages like 1.2 V, 1.8 V, 3.3 V, and 5 V for embedded systems.

Procurement Notes

Verify the exact suffix and packaging configuration when ordering, as tape and reel quantities may vary by distributor. Confirm that the application environment remains within the specified industrial temperature limits. Ensure input voltage does not exceed the 14 V maximum rating to prevent device damage. Check for any specific handling requirements related to the HSON-8 surface mount package during assembly.

Selection Notes

Select this component when a compact solution is required for stepping down voltages from 3.5 V to 14 V inputs. It is suitable for designs needing up to 1.2 A output current with minimal external component count due to integrated FETs. Consider the 1.0 MHz switching frequency for balancing efficiency and passive component size. Verify compatibility with target output voltages ranging from 1.2 V to 12 V.

Part Context

This part belongs to the BD8313 series of switching regulators manufactured by ROHM Semiconductor. It is classified as a standard-grade product intended for general-purpose applications. The manufacturer explicitly states that this product is not recommended for use in automotive equipment. It serves as a monolithic solution combining control logic and power stages in a small footprint.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official ROHM resources for cross-reference data or equivalent products within the BD83xx family if replacement is necessary.