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Product Detailed Parameters
- Description：IC REG BUCK 1.8V 2A 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：2A
- 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 BD90528EFJ-CE2 is a synchronous step-down DC/DC converter manufactured by ROHM Semiconductor. It operates with an input voltage range of 2.69V to 5.5V and provides a fixed output voltage. The device integrates internal P-channel and N-channel MOSFETs, supporting a maximum output current of 2A. It functions at a fixed switching frequency of 2.25MHz, which facilitates the use of smaller external inductors and capacitors. The component is designed for automotive applications, meeting AEC-Q100 qualification standards.
Feature Summary
- Integrates high-side P-MOSFET and low-side N-MOSFET for efficient synchronous rectification
- Fixed switching frequency operation enables compact passive component selection
- Built-in protection mechanisms including overcurrent protection and thermal shutdown
- Automotive-grade reliability with AEC-Q100 certification
Applications
- Automotive infotainment systems
- Instrument cluster power supplies
- Body control module (BCM) distribution networks
- Sensor interface circuits requiring stable 5V or 3.3V rails
Procurement Notes
Verify the complete part number including the suffix CE2 to ensure correct packaging and automotive grade specification. Confirm that the fixed output voltage matches the target load requirements, as adjustable variants exist within the same family. Check RoHS compliance status and functional safety support documentation if required for ASIL-rated designs. Ensure the HTSOP-J8 package footprint aligns with the PCB layout constraints.
Selection Notes
Select this component when a fixed output voltage is preferred over adjustable regulation to simplify external resistor networks. The 2.25MHz frequency is suitable for space-constrained designs requiring smaller magnetic components compared to lower-frequency alternatives. Consider the 2A current capability against peak load demands, accounting for derating at elevated junction temperatures. Verify input voltage stability within the 2.69V to 5.5V window during all operating conditions.
Part Context
This device belongs to ROHM's BD9052x series of synchronous buck converters optimized for automotive electronics. It shares architectural similarities with models like the BD90521EFV-C but differs in package type and fixed output configuration. The series targets 12V vehicle battery systems stepped down to lower logic voltages. It complements other ROHM PMICs such as LDO regulators for comprehensive power management solutions.
Replacement Considerations
The BD90525EFJ-CE2 is a confirmed substitute offering identical 2.25MHz operation and 2A capacity with a fixed 1.5V output. Verify output voltage compatibility before substitution. Other family members like BD90532EFJ-CE2 share similar electrical characteristics but may differ in specific output settings or pinout configurations.
