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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 8HTSOP-J
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：7V
- Voltage - Input (Max)：36V
- Voltage - Output (Min/Fixed)：1V
- Voltage - Output (Max)：28.8V
- Current - Output：3A
- Frequency - Switching：300kHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-HTSOP-J
- Grade：-
- Qualification：-
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Overview
The BD9E303UEFJ-LBH2 is a synchronous buck DC/DC converter from ROHM Semiconductor, designed for industrial applications. It features an input voltage range of 7V to 36V and delivers up to 3A output current. The device supports adjustable output voltages between 1V and 28.8V. It operates with a maximum switching frequency of 345kHz and includes integrated power MOSFETs. The component is housed in an 8-pin HTSOP-J package with dimensions of 4.9mm x 3.9mm and a height of 0.85mm. It functions within a junction temperature range of -40°C to 150°C.
Feature Summary
- Integrated synchronous rectification with built-in low on-resistance power MOSFETs for high efficiency.
- Constant on-time control architecture providing fast transient response and simplified phase compensation.
- Comprehensive protection mechanisms including over-current, short circuit, thermal shutdown, and under-voltage lockout.
- Designed for long-term supply stability specifically targeting industrial equipment markets.
Applications
- Industrial automation systems requiring stable power regulation.
- General-purpose DC/DC conversion for embedded electronics.
- Power supplies for devices needing wide input voltage tolerance.
Procurement Notes
Verify the specific suffix (LBH2) against official ROHM documentation to confirm pinout and electrical characteristics, as variations exist within the BD9E303 series. Ensure compatibility with your PCB footprint, specifically the HTSOP-J8 exposed pad thermal requirements. Confirm RoHS compliance status through the latest datasheet revision. Check for any pending Product Change Notices that may affect specifications or packaging without altering electrical performance.
Selection Notes
Select this component when a wide input voltage range up to 36V is required alongside a 3A output capability. It is suitable for designs prioritizing fast transient response due to its constant on-time control method. Consider the HTSOP-J8 package for space-constrained surface-mount applications. Evaluate the thermal performance given the 150°C maximum junction temperature rating for industrial environments.
Part Context
This part belongs to the BD9E300EFJ series of integrated MOSFET DC-DC converters. The series utilizes constant on-time control to achieve high oscillation frequencies with low inductance. These regulators are optimized for low standby power consumption, making them ideal for energy-efficient industrial applications. The BD9E303 variant specifically offers 3A output capacity.
Replacement Considerations
The BD9E303EFJ-LBE2 is a documented alternative within the same family, offering similar electrical characteristics. Verify package compatibility and pin alignment before substitution. Other members of the BD9E300EFJ series may serve as functional replacements if current ratings and input ranges align with system requirements.
