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Product Detailed Parameters
- Description：IC REG BUCK ADJ 2A 20HTSSOP-B
- 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)：2.6V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：0.6V
- Voltage - Output (Max)：5V
- Current - Output：2A
- Frequency - Switching：300kHz ~ 2.4MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-VSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：20-HTSSOP-B
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The BD90521EFV-CE2 is a synchronous rectifying step-down DC/DC converter manufactured by ROHM Semiconductor. It operates with an input voltage range of 2.6 V to 5.5 V and delivers up to 2 A output current. The device supports adjustable switching frequencies from 300 kHz to 2.4 MHz, enabling external component miniaturization. It features integrated P-channel and N-channel power MOSFETs within an HTSSOP-B20 package. Key electrical parameters include a maximum operating temperature of +125 °C, a minimum operating temperature of -40 °C, and a shutdown function for power management.
Feature Summary
- Synchronous buck topology with integrated power MOSFETs for high efficiency
- Adjustable switching frequency up to 2.4 MHz for compact design
- Current mode control architecture for stable operation
- Automotive-grade qualification supporting functional safety analysis
Applications
- Automotive infotainment systems
- Instrument cluster power supplies
- Body Control Module (BCM) applications
- ADAS sensor power distribution
Procurement Notes
Verify the specific suffix CE2 against the official datasheet to confirm pinout and packaging details. Confirm RoHS compliance status and moisture sensitivity level requirements before ordering. Ensure the supplier provides valid traceability documentation for automotive-grade components. Check for any active Product Change Notices that may affect mechanical or electrical specifications.
Selection Notes
Select this component when a wide input voltage range and high output current are required in a compact form factor. The adjustable frequency allows optimization for size versus efficiency trade-offs. Consider the thermal performance in the HTSSOP-B20 package for high-load scenarios. Verify compatibility with existing system clocking if external synchronization is needed.
Part Context
This part belongs to the BD90521 series of synchronous buck converters designed for automotive applications. It is part of ROHM's portfolio of PMIC solutions aimed at reducing board space through high-frequency operation. The series is characterized by its robustness in automotive environments and support for functional safety standards.
Replacement Considerations
BD90521EFV-C is the non-tape reel variant of the same electrical specification. BD90535EFJ-CE2 offers fixed output but different current ratings. Verify pin-to-pin compatibility and electrical equivalence before substitution.
