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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 800MA 8MSOP
- 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)：4.5V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：800mA
- Frequency - Switching：1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-25°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-VSSOP, 8-MSOP (0.110", 2.80mm Width)
- Supplier Device Package：8-MSOP
- Grade：-
- Qualification：-
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Overview
The BD8967FVM-TR is a synchronous buck switching regulator manufactured by ROHM Semiconductor. It operates with an input voltage range of 4.5 V to 5.5 V and provides a fixed output voltage of 3.3 V. The device delivers a maximum output current of 0.8 A. It features a switching frequency of 1.2 MHz and incorporates current-mode PWM control for fast transient response. The component includes soft-start functionality, thermal protection, and under-voltage lockout (ULVO). It is housed in an 8-pin MSOP package and supports surface-mount installation.
Feature Summary
- Synchronous buck topology with integrated MOSFETs
- Current-mode PWM control system for rapid transient response
- Built-in soft-start function to limit inrush current
- Comprehensive protection including thermal shutdown and under-voltage lockout
Applications
- Portable electronic devices requiring efficient step-down regulation
- Embedded systems powered by 5V nominal rails
- Battery-operated equipment needing extended runtime
- Industrial control modules with strict thermal constraints
Procurement Notes
Verify the exact part number suffix against official ROHM documentation to confirm pinout compatibility and electrical specifications. Confirm that the 3.3V fixed output variant matches your design requirements, as other variants in the series may offer adjustable outputs or different current ratings. Ensure the MSOP-8 package dimensions align with your PCB footprint guidelines before finalizing procurement.
Selection Notes
Select this component when a compact solution is needed for stepping down 5V inputs to 3.3V at moderate currents. The 1.2 MHz switching frequency allows for smaller external passive components compared to lower-frequency regulators. Consider the thermal performance in enclosed spaces due to the small package size. Verify that the 0.8A output current meets the peak load demands of the target application without exceeding the junction temperature limits.
Part Context
This part belongs to ROHM's PMIC - Voltage Regulators - DC DC Switching Regulators family. It is specifically designed as a high-efficiency step-down converter. The BD8967FVM-TR shares architectural similarities with other members of the BD896x series but is distinguished by its fixed 3.3V output and 0.8A current capability. It serves as a power management solution for space-constrained applications requiring reliable voltage regulation from standard 5V sources.
Replacement Considerations
Direct substitutes within the same ROHM series include parts with compatible pinouts and similar electrical characteristics, such as those offering adjustable outputs if voltage flexibility is required. Cross-referencing with other manufacturers requires careful verification of input voltage ranges, output current capabilities, and package dimensions to ensure functional equivalence.
