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Product Detailed Parameters
- Description：IC REG BUCK 1.8V 3A 8HTSOP-J
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：2.69V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Current - Output：3A
- Frequency - Switching：2.25MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°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 BD90538EFJ-CE2 is a synchronous buck switching regulator IC manufactured by ROHM Semiconductor. It integrates a power MOSFET and operates with a constant on-time control method to ensure rapid transient response. The device supports an input voltage range of 3.8V to 36V and provides a fixed positive output of 1.8V at a maximum current capacity of 3A. It features a high switching frequency of 2.25MHz, allowing for the use of small external inductors. The component is housed in an 8-pin HTSOP-J package and is qualified under AEC-Q100 standards for automotive applications.
Feature Summary
- Integrates a power MOSFET within a synchronous buck topology for efficient DC-DC conversion.
- Utilizes constant on-time control architecture to deliver fast transient response characteristics.
- Supports high-frequency operation at 2.25MHz to minimize external component size.
- Includes built-in protection mechanisms such as thermal shutdown and overcurrent protection.
Applications
- Automotive infotainment systems requiring stable 1.8V power rails.
- Electronic control units (ECUs) utilizing AEC-Q100 qualified components.
- Portable electronic devices needing compact power management solutions.
- Industrial control systems requiring wide input voltage tolerance.
Procurement Notes
Verify the specific suffix CE2 to confirm the tape and reel packaging configuration and RoHS compliance status. Ensure the ordering part number matches the exact pinout and electrical specifications required for your design. Cross-reference the manufacturer's latest datasheet to confirm availability and any potential lifecycle changes or obsolescence notices before finalizing procurement plans.
Selection Notes
Select this component when a fixed 1.8V output is required from a variable input source between 3.8V and 36V. The 3A current rating suits moderate load applications. Consider the 8-pin HTSOP-J package for space-constrained PCB layouts. The AEC-Q100 qualification makes it suitable for automotive environments where reliability and temperature stability are critical requirements.
Part Context
This part belongs to the BD90x series of integrated MOSFET DC-DC buck converters from ROHM. These regulators are designed for applications demanding low standby power and fast transient response. The series utilizes a proprietary constant on-time control method to maintain efficiency across varying load conditions while supporting high switching frequencies for miniaturization.
Replacement Considerations
Check for direct substitutes within the BD90x family that offer compatible voltage and current ratings. Verify pin-to-pin compatibility if replacing on existing boards. Confirm that alternative parts meet the same AEC-Q100 automotive grade requirements and package dimensions.
