BD9E151NUX-TR

Overview

The BD9E151NUX-TR is a non-synchronous buck switching regulator manufactured by ROHM Semiconductor. It features an integrated power MOSFET and supports an input voltage range of 6 V to 28 V. The device provides a single adjustable output voltage ranging from 1 V to 19.6 V, with a maximum output current capability of 1.2 A. Operating at a typical switching frequency of 600 kHz, it utilizes constant on-time control for fast transient response. The component is housed in an 8-pin VSON (VSON008X2030) package measuring 2.0 mm by 3.0 mm. It operates within a temperature range of -40 °C to +85 °C and includes built-in protection functions such as over-current protection, under-voltage lockout, over-voltage protection, and thermal shutdown.

Feature Summary

• Integrates a high-voltage power MOSFET rated for 30 V and 80 mΩ on-resistance to support wide input ranges up to 28 V.
• Employs constant on-time control architecture to deliver rapid load transient response while maintaining efficiency at light loads.
• Includes comprehensive internal protection mechanisms including over-current, under-voltage lockout, over-voltage, and thermal shutdown.
• Achieves zero standby current consumption during shutdown mode, making it suitable for battery-powered applications.

Applications

• Battery-powered portable electronic devices requiring low standby power consumption
• General-purpose step-down power supply circuits in consumer electronics
• Embedded systems utilizing ceramic output capacitors for compact design

Procurement Notes

Verify the current lifecycle status before procurement, as this component is marked as NRND (Not Recommended for New Designs). Confirm availability through authorized distributors or secondary markets, as standard stock may be limited. Ensure that the VSON008X2030 package dimensions align with your PCB footprint requirements. Check for RoHS compliance documentation if required for your specific manufacturing standards.

Selection Notes

Select this component when a wide input voltage range up to 28 V is required alongside moderate output current capabilities of 1.2 A. It is appropriate for designs prioritizing small form factors due to its compact VSON packaging. Consider alternatives if synchronous rectification is necessary for higher efficiency at heavy loads, as this model uses diode rectification. Ensure the application does not require automotive-grade qualification, as this part is not recommended for vehicle equipment.

Part Context

This part belongs to the BD9E15x series of integrated MOSFET DC-DC buck converters from ROHM. These devices are designed for applications needing high-frequency operation and fast transient response using constant on-time control. The series targets cost-sensitive and space-constrained environments where external phase compensation is simplified. It sits within the broader PMIC category, specifically addressing step-down voltage regulation needs for general electronics.

Replacement Considerations

BD9E151ANUX-TR