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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 8HTSOP-J
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：7V
- Voltage - Input (Max)：42V
- Voltage - Output (Min/Fixed)：1V
- Voltage - Output (Max)：29.4V
- Current - Output：3A
- Frequency - Switching：300kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 105°C (TA)
- 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 BD9876AEFJ-E2 is a flexible step-down switching regulator with an integrated power MOSFET. It delivers up to 3.0A output current and operates at a fixed oscillation frequency of 300kHz, which facilitates external coil and capacitor downsizing. The device features an internal Nch-FET switch rated for 45V withstand voltage. It utilizes current mode control to ensure high-speed load response and simplified phase compensation. The feedback voltage accuracy is specified at 1.0V ±1.0%. The component supports synchronization to an external clock within the 200kHz to 500kHz range.
Feature Summary
- Integrates a 45V withstand voltage Nch-FET switch for compact power supply designs
- Employs current mode control for fast transient response and simple phase compensation
- Supports external clock synchronization between 200kHz and 500kHz
- Includes built-in protection circuits for overcurrent, thermal shutdown, and low input error prevention
Applications
- Secondary side power supplies for household appliances
- Step-down conversion from 12V or 24V fixed lines to 1.2V, 1.8V, 3.3V, or 5V outputs
- General industrial equipment requiring compact DC-DC conversion
Procurement Notes
Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm pinout compatibility and environmental compliance status. Confirm that the 300kHz fixed frequency meets your system's noise requirements, as this differs from variable frequency alternatives in the same family. Ensure adequate thermal management is designed for the HTSOP-J8 package given the 3A current capability.
Selection Notes
Select this component when a fixed 300kHz switching frequency is preferred to minimize passive component size. It is suitable for applications requiring synchronization to an external clock source between 200kHz and 500kHz. Choose this part if the input voltage does not exceed 45V and a non-synchronous buck topology is acceptable. It is ideal for cost-sensitive designs where external phase compensation complexity must be minimized.
Part Context
This part belongs to ROHM's BD98 series of flexible step-down switching regulators. These devices are characterized by their integration of high-voltage power MOSFETs and current-mode control architectures. The series targets applications needing robust performance in compact form factors, such as consumer electronics and industrial systems, offering a balance between efficiency and design simplicity.
Replacement Considerations
The BD9876EFJ is a related variant within the same product line. Verify if the standard version meets your specific voltage or temperature requirements before substituting. Check datasheets for differences in operating temperature ranges and exact electrical parameters to ensure functional equivalence.
