BD9G201UEFJ-LBE2

Overview

The BD9G201UEFJ-LBE2 is a single-channel synchronous buck switching regulator IC from ROHM Semiconductor, housed in an HTSOP-J8 surface-mount package. It integrates a power MOSFET and operates with an input voltage range of 4.5 V to 42 V. The device delivers a maximum output current of 1.5 A with an adjustable output voltage range of 800 mV to 42 V. Key electrical parameters include a fixed internal switching frequency of 300 kHz, a typical quiescent current of 10 µA, and a supply current of 1.2 mA during operation. It supports a shutdown function and functions within an ambient temperature range of -40°C to +105°C.

Feature Summary

• Integrates a high-side N-channel power MOSFET for compact design
• Utilizes constant on-time control architecture for fast transient response
• Features low standby current consumption suitable for battery-powered applications
• Includes comprehensive protection mechanisms such as over-current and thermal shutdown

Applications

• Industrial equipment power supplies
• Consumer electronics portable devices
• Embedded systems requiring efficient step-down conversion
• General-purpose DC-DC regulation in space-constrained designs

Procurement Notes

Verify the specific suffix LBE2 against the manufacturer's latest datasheet to confirm tape-and-reel packaging specifications and RoHS compliance status. Ensure that the ordering code matches the exact pinout and thermal characteristics required for your PCB layout. Cross-reference the component marking with official ROHM documentation to prevent counterfeit substitution. Confirm availability through authorized distributors only.

Selection Notes

Select this component when a single-output buck converter with integrated FETs is required for inputs up to 42 V. It is appropriate for designs prioritizing low quiescent current and small solution size. Consider the 300 kHz fixed frequency when selecting external inductors and capacitors. Evaluate the thermal performance in the HTSOP-J8 package against your expected load current and ambient conditions.

Part Context

This part belongs to the BD9G201 series of integrated MOSFET DC-DC converters. These devices are designed for applications demanding high efficiency and minimal external component count. The series utilizes constant on-time control to achieve stable operation across wide input voltage ranges. The BD9G201UEFJ-LBE2 variant specifically denotes the lead-free, halogen-free version packaged in HTSOP-J8.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult ROHM technical support or authorized distributor databases for direct replacements or pin-compatible alternatives.