BD9740KN-E2

Overview

The BD9740KN-E2 is a switching voltage regulator IC manufactured by ROHM Semiconductor, designed for surface-mount installation in a 64-pin VFQFN package. It operates as a buck, boost, and buck-boost converter with seven positive output channels. The device supports a wide supply voltage range from 1.5 V to 10 V and features a high-precision reference voltage with ±1% accuracy. Each output channel provides up to 30 mA of current. The component includes a built-in shutdown circuit utilizing a timer-latch mechanism for overload protection.

Feature Summary

• Integrates buck, boost, and buck-boost switching regulator capabilities within a single IC
• Provides seven independent positive output channels with 30 mA capacity each
• Features a high-precision reference voltage ensuring ±1% accuracy
• Includes a built-in timer-latch shutdown circuit for overload protection

Applications

• Portable electronic devices requiring multiple low-voltage rails
• Battery-powered systems needing efficient power conversion
• Embedded applications with space-constrained PCB layouts

Procurement Notes

Verify the specific suffix E2 against the manufacturer's official documentation to confirm pinout compatibility and thermal characteristics. Confirm that the 64-pin VFQFN package matches the target PCB footprint. Check for end-of-life status or alternative part numbers if long-term availability is required. Ensure input voltage limits are respected during system design.

Selection Notes

Select this component when a multi-output solution is needed to reduce bill of materials count. The integrated FET design simplifies external component selection compared to discrete solutions. Consider the 30 mA per channel limit to ensure it meets load requirements without derating issues. Evaluate the thermal performance within the 64-pin package for the intended operating environment.

Part Context

This part belongs to ROHM's System Switching Regulator ICs series, which integrates internal MOSFETs to minimize external component count. The BD9740KN-E2 variant specifically targets applications requiring multiple regulated outputs from a single input source. It falls under the broader category of specialized power management ICs designed for efficiency and compactness in consumer electronics.

Replacement Considerations

Consult official substitution guides for direct replacements. Verify electrical parameters such as output current and voltage ranges before swapping.