BD9897FS-BZE2

Power Management - Specialized Overview

The BD9897FS-BZE2 is a synchronous step-down DC/DC converter designed for automotive applications, featuring an integrated high-side N-channel MOSFET and a low-side N-channel MOSFET. It operates with an input voltage range of 4.5V to 36V, delivering a maximum output current of 3A. The device supports adjustable output voltages from 0.8V to 32V via an external resistor divider. It incorporates fixed frequency PWM control at selectable frequencies of 200kHz, 400kHz, or 600kHz. Key protection features include overcurrent protection, thermal shutdown, and undervoltage lockout.

Power Management - Specialized Feature Summary

• Integrated synchronous rectification with internal high-side and low-side N-channel MOSFETs for improved efficiency.
• Fixed-frequency PWM operation with selectable switching frequencies to optimize inductor size and transient response.
• Comprehensive protection mechanisms including overcurrent protection, thermal shutdown, and undervoltage lockout ensure reliable operation under fault conditions.

Power Management - Specialized Applications

• Automotive infotainment systems
• Digital chassis modules
• Body control modules

Power Management - Specialized Procurement Notes

Verify the specific suffix BZE2 against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with automotive AEC-Q100 qualification requirements if applicable to your design. Cross-reference pinouts and thermal pad configurations with the latest mechanical drawing before PCB layout finalization.

Power Management - Specialized Selection Notes

Select this component when designing automotive power supplies requiring a 3A output capability within a 4.5V to 36V input range. Consider the available switching frequencies (200kHz, 400kHz, 600kHz) based on desired inductor size and electromagnetic interference constraints. Verify that the required output voltage falls within the 0.8V to 32V adjustable range supported by the external feedback network.

Power Management - Specialized Part Context

This part belongs to Rohm Semiconductor's automotive-grade synchronous buck converter family. It is engineered specifically for harsh automotive environments, offering robust performance and reliability. The BD9897 series provides a compact solution for various vehicle subsystems, balancing efficiency, size, and cost-effectiveness for mass-produced electronic control units.

Power Management - Specialized Replacement Considerations

Consult the manufacturer's official substitution guide for verified alternatives. Direct replacements must match the 3A current rating, 36V max input, and automotive qualification standards. Verify pin-to-pin compatibility and thermal characteristics before integrating any substitute component into an existing design.

Power Management - Specialized FAQ

What are the selectable switching frequencies for the BD9897FS-BZE2?

The device supports fixed switching frequencies of 200kHz, 400kHz, and 600kHz, which can be selected via external resistors.

Does the BD9897FS-BZE2 include internal protection features?

Yes, it includes overcurrent protection, thermal shutdown, and undervoltage lockout to protect the device and connected loads.