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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 16VQFN
- 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)：2.7V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：4.4V
- Current - Output：4A
- Frequency - Switching：2.2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-VFQFN Exposed Pad
- Supplier Device Package：VQFN016V3030
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The BD9S400MUF-CE2 is a synchronous buck DC/DC converter manufactured by ROHM Semiconductor, designed for automotive applications. It features an integrated power MOSFET and operates within an input voltage range of 2.7 V to 5.5 V. The device delivers a maximum output current of 4 A with an adjustable output voltage between 800 mV and 4.4 V. It utilizes a fixed switching frequency of 2.2 MHz and supports SMD/SMT installation in a VQFN16FV3030 package. Qualified under AEC-Q100 Grade 1 standards, it functions reliably across temperatures from -40°C to +125°C.
Feature Summary
- Integrates low on-resistance power MOSFETs for high-efficiency synchronous rectification
- Employs SLLM™ control technology to optimize efficiency during light load conditions
- Features current-mode control architecture for rapid transient response and simplified phase compensation
- Supports external pulse synchronization capabilities
Applications
- Automotive infotainment systems
- ADAS sensor power supplies
- Vehicle body control modules (BCM)
- Instrument cluster power distribution
Procurement Notes
Verify the specific suffix CE2 against official ROHM documentation to confirm pinout compatibility and RoHS status. Ensure the ordering part number matches the required wettable flank package variant. Cross-reference the datasheet revision date to validate thermal model parameters and electrical specifications before finalizing procurement orders.
Selection Notes
Select this component when designing automotive power stages requiring a compact solution with integrated switches. It is suitable for applications needing fast transient response and high efficiency at light loads. Consider the 2.2 MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives.
Part Context
This device belongs to the BD9S40 series of single-channel synchronous buck converters. It is engineered specifically for automotive environments, offering robust performance under varying thermal conditions. The series emphasizes miniaturization through integrated FETs and advanced light-load management techniques.
Replacement Considerations
The BD9S400MUF-C is listed as an alias for this part number. Verify if the CE2 suffix denotes a specific tape-and-reel packaging configuration or environmental compliance update rather than a functional change.
