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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)：3.85V
- Current - Output：4A
- Frequency - Switching：1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-VFQFN Exposed Pad
- Supplier Device Package：VQFN016V3030
- Grade：-
- Qualification：-
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Overview
The BD9A400MUV-E2 is a synchronous buck DC-DC converter manufactured by ROHM Semiconductor. It operates with an input voltage range of 2.7 V to 5.5 V and delivers up to 4 A output current. The adjustable output voltage spans from 800 mV to 3.85 V. Key electrical parameters include a switching frequency of 1 MHz, quiescent current of 10 uA, and operating supply current of 350 uA. The device functions within a temperature range of -40°C to +85°C and utilizes a VQFNV3030-EP-16 package.
Feature Summary
- Integrates low on-resistance power MOSFETs for high efficiency in a compact form factor.
- Employs SLLM™ control technology to optimize efficiency during light load conditions.
- Features current mode control architecture enabling rapid transient response and simplified phase compensation.
Applications
- Portable electronic devices requiring efficient step-down conversion
- Battery-powered equipment needing reduced standby power consumption
- General-purpose single-channel power management systems
Procurement Notes
Verify the specific suffix E2 against official ROHM documentation to confirm compliance status and revision details. Ensure the VQFNV3030-EP-16 package variant matches design requirements. Cross-reference thermal dissipation needs with the backside heat dissipation capability specified in the datasheet. Confirm availability through authorized channels to guarantee component authenticity.
Selection Notes
Select this component when a single-channel synchronous buck converter is required for inputs between 2.7 V and 5.5 V. It is suitable for designs prioritizing light-load efficiency via SLLM™ control. Consider the 1 MHz switching frequency for smaller external inductor sizes. Verify that the 4 A continuous output current meets the maximum load demands of the target application circuit.
Part Context
This part belongs to the BD9A400MUV series of single-channel synchronous buck converters. It shares the VQFNV3030-EP-16 package topology with related models like the BD9A100MUV-E2 and BD9A600MUV-E2. The series focuses on integrating controller and power FETs for space-constrained applications while maintaining high efficiency across varying load conditions.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Consult official manufacturer documentation for potential cross-references or updated revisions before substituting components in existing designs.
