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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 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)：4.75V
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：0.9V
- Voltage - Output (Max)：16.2V
- Current - Output：4A
- Frequency - Switching：380kHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°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 BD9324EFJ-E2 is a single-output step-down DC-DC converter manufactured by ROHM Semiconductor. It integrates a low on-resistance power MOSFET into a single chip, supporting an input voltage range of 4.75 V to 18 V and delivering a maximum output current of 4 A. The device operates at a fixed switching frequency of 380 kHz and features a shutdown function for power management. It is housed in an HTSOP-8 package with dimensions of 4.9x6.0 mm and is rated for an operating temperature range from -40 °C to +85 °C.
Feature Summary
- Integrates a low on-resistance power MOSFET to minimize external component count and reduce overall system cost.
- Employs current-mode control architecture to ensure high-speed transient response characteristics and simplified phase compensation requirements.
Applications
- Industrial equipment power supplies
- General-purpose embedded systems requiring efficient step-down conversion
- Battery-powered devices needing wide input voltage tolerance
Procurement Notes
Verify the specific ordering code against the manufacturer's latest documentation to confirm availability status. Note that this component may be subject to end-of-life notices or production discontinuation. Confirm RoHS compliance and packaging details directly with authorized distributors before finalizing procurement plans.
Selection Notes
Select this component when a compact, integrated solution is required for converting higher voltages to lower levels with moderate current demands. The fixed 380 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Ensure the application environment stays within the specified -40 °C to +85 °C operating temperature range for reliable performance.
Part Context
This part belongs to the BD9324 series of integrated MOSFET DC-DC buck converters from ROHM. These devices are designed to simplify power supply design by combining the controller and power switch in one package. The series targets applications where board space is limited and efficiency is critical, offering a robust alternative to discrete MOSFET and controller combinations.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source data. Consult the manufacturer's official documentation for potential pin-compatible or functionally equivalent alternatives if this component is discontinued.
