ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 8HTSOP-J
- 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)：4.5V
- Voltage - Input (Max)：18V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：12.6V
- Current - Output：4A
- Frequency - Switching：500kHz
- 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：-
Download product information
Overview
The BD9C401EFJ-E2 is a synchronous buck DC/DC converter manufactured by ROHM Semiconductor. It features an input voltage range of 4.5 V to 18 V and delivers a maximum output current of 4 A. The adjustable output voltage spans from 800 mV to 12.6 V. Operating at a fixed switching frequency of 500 kHz, the device utilizes current mode control for fast transient response. It includes integrated low on-resistance MOSFETs and offers a shutdown function with a typical static current of 10 µA. The component operates within a temperature range of -40°C to +85°C and is housed in an 8-HTSOP-J package.
Feature Summary
- Employs current mode control architecture to ensure rapid transient response characteristics.
- Integrates power MOSFETs with low on-resistance to enhance conversion efficiency.
- Supports external synchronization or fixed frequency operation for noise management.
- Includes built-in protection mechanisms such as thermal shutdown and under-voltage lockout.
Applications
- Industrial equipment power supplies
- Consumer electronics secondary side regulation
- Infotainment system power distribution
- General purpose step-down voltage conversion
Procurement Notes
Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm RoHS compliance and lead time requirements. Ensure the ordering code matches the exact tape and reel specifications required for your assembly line. Cross-reference the pinout diagram with your PCB layout to prevent installation errors. Confirm that the ambient operating temperature aligns with the specified -40°C to +85°C range for your intended application environment.
Selection Notes
Select this component when a 4 A output current is required from an input voltage between 4.5 V and 18 V. The fixed 500 kHz switching frequency allows for the use of smaller inductors compared to lower frequency alternatives. The adjustable output range up to 12.6 V provides flexibility for various logic levels. Consider the 8-HTSOP-J package size constraints during PCB design to ensure adequate thermal dissipation and soldering clearance.
Part Context
This part belongs to the BD9C401 series of integrated MOSFET DC-DC buck converters from ROHM. The series is designed for applications requiring high efficiency and compact solutions. Similar parts in the lineup may offer different current ratings or input voltage ranges, such as the BD9G401 for higher input voltages. The E2 suffix typically denotes specific environmental or packaging variations within the product family.
Replacement Considerations
Direct substitutes include other ROHM synchronous buck converters with similar electrical characteristics. Verify compatibility regarding pin configuration, thermal performance, and control loop stability before swapping components. Alternative manufacturers may offer functionally equivalent parts, but parameter matching is essential for circuit integrity.
