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Product Detailed Parameters
- Description：IC REG BUCK 5V 1A VQFN20FV4040
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：3.5V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Current - Output：1A
- Frequency - Switching：2.2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount, Wettable Flank
- Package / Case：20-VFQFN Exposed Pad
- Supplier Device Package：VQFN20FV4040
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The BD9P155MUF-CE2 is a single-channel synchronous buck DC/DC converter from ROHM Semiconductor, designed for automotive applications. It features Nano Pulse Control technology and integrates power MOSFETs within a VQFN4040-EP-20 package. The device operates with an input voltage range of 3.5 V to 40 V, providing a fixed 5.0 V output at up to 1.0 A. It supports a switching frequency of 2.2 MHz and functions reliably across a temperature range of -40°C to +125°C.
Feature Summary
- Integrates Nano Pulse Control technology for stable operation under high step-down ratios
- Includes built-in power MOSFETs for compact system design
- Supports spread spectrum function to reduce electromagnetic interference
Applications
- Advanced Driver Assistance Systems (ADAS) sensors
- Automotive infotainment systems
- Body Control Modules (BCM)
Procurement Notes
Verify the specific suffix CE2 against the manufacturer's latest documentation to confirm pinout compatibility and RoHS status. Confirm that the VQFN4040-EP-20 wettable flank package requirements align with your assembly capabilities. Ensure the fixed 5.0 V output meets your system voltage rails before procurement.
Selection Notes
Select this component when a fixed 5.0 V rail is required from a wide automotive input range. The integrated MOSFETs simplify thermal management compared to discrete solutions. Verify that the 1.0 A output current capacity suffices for the target load. Consider the 2.2 MHz frequency for inductor size optimization relative to lower-frequency alternatives.
Part Context
This part belongs to the BD9P series of automotive-grade DC/DC converters. These devices are engineered for high reliability in harsh environments, featuring functional safety support characteristics. The series targets applications demanding small form factors and high efficiency in vehicle electronics.
Replacement Considerations
Check for BD9P155MUF-C as a potential variant. Verify package dimensions and electrical specifications against the original datasheet before substitution.
