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Product Detailed Parameters
- Description：IC REG BUCK ADJ 2A 8SOP
- 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)：7V
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：1V
- Voltage - Output (Max)：35V
- Current - Output：2A
- Frequency - Switching：50kHz ~ 500kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.173", 4.40mm Width)
- Supplier Device Package：8-SOP
- Grade：-
- Qualification：-
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Overview
The BD9778F-E2 is a non-synchronous buck switching regulator IC manufactured by Rohm Semiconductor. It operates with an input voltage range of 7V to 35V and provides a single adjustable positive output from 1V up to the input voltage. The device delivers a maximum output current of 2A. The internal switching frequency is programmable between 50kHz and 500kHz via an external resistor. It is housed in an 8-SOP package and supports an operating temperature range of -40°C to 125°C.
Feature Summary
- Supports wide input voltage range from 7V to 35V for flexible power supply integration
- Features adjustable output voltage set via external resistors within the 1V to VIN range
- Allows user-defined switching frequency adjustment through an external resistor connection
Applications
- General purpose DC-DC conversion in industrial equipment
- Power regulation for embedded systems requiring wide input tolerance
- Voltage step-down applications in consumer electronics
Procurement Notes
Verify component authenticity as this part is marked as discontinued by the manufacturer. Confirm final stock availability with authorized distributors before design finalization. Ensure ordering suffixes match the required packaging format, such as tape and reel or cut tape, to align with assembly line requirements.
Selection Notes
Select this component when a robust non-synchronous buck converter is needed for inputs up to 35V. It is suitable for designs prioritizing cost-effectiveness over high-efficiency synchronous rectification. Ensure the application can accommodate the larger passive components typically associated with lower switching frequencies compared to modern high-frequency alternatives.
Part Context
This IC belongs to the BD9778 series of buck converters from Rohm Semiconductor. It shares functional similarities with other members like the BD9778HFP but differs in package type and specific pinout configuration. The series is designed for general-purpose power management tasks requiring reliable voltage regulation across varying load conditions.
Replacement Considerations
Check for direct substitutes within the BD9778 family, such as BD9778HFP, ensuring package compatibility. Verify that alternative devices support the same 35V input limit and 2A output current capability. Review datasheets for differences in switching frequency ranges and thermal performance characteristics.
