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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1A VQFN20FV4040
- 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)：3.5V
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：8.5V
- 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 BD9P105MUF-CE2 is a synchronous buck DC/DC converter from ROHM Semiconductor, designed for automotive applications. It features an input voltage range of 3.5 V to 40 V and provides a single adjustable output from 0.8 V to 8.5 V with a maximum output current of 1.0 A. The device operates at a fixed switching frequency of 2.2 MHz and maintains a low quiescent current of 10 uA. It supports an operating temperature range from -40°C to +125°C and is housed in a VQFNFV4040-EP-20 package.
Feature Summary
- Integrates power MOSFETs and controller in a compact synchronous buck topology
- Utilizes Nano Pulse Control technology for stable operation under high step-down ratios
- Includes spread spectrum function to reduce electromagnetic interference (EMI)
- Features fast response capability to maintain stability during battery start-up events
Applications
- Advanced Driver Assistance Systems (ADAS) sensors
- Automotive cameras and radar systems
- In-vehicle infotainment units
- Instrument clusters
- Body Control Modules (BCM)
Procurement Notes
Verify the specific suffix CE2 against the official datasheet to confirm pinout and thermal pad specifications. Ensure the ordering part number matches the required tape and reel quantity of 2500 units. Confirm RoHS compliance status directly from the manufacturer's documentation before finalizing procurement orders.
Selection Notes
Select this component when a wide input voltage range up to 40 V is required for automotive primary DC/DC conversion. It is suitable for designs needing high efficiency and low EMI through spread spectrum modulation. Consider the VQFNFV4040-EP-20 package size constraints and the 1 A output current limit for load requirements.
Part Context
This part belongs to the BD9P series of ROHM Semiconductor, which focuses on 42V withstand voltage automotive primary DC/DC converters. The series emphasizes miniaturization, high reliability, and BOM cost reduction for modern vehicle electronics requiring robust power management solutions.
Replacement Considerations
Check for BD9P105MUF-C as an alias or variant. Verify electrical compatibility with other BD9P series parts like BD9P108MUF-CE2 if different output ranges are needed, ensuring package and pinout alignment.
