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Product Detailed Parameters
- Description：IC REG BUCK ADJ 1A 20HTSSOP-B
- 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
- Package / Case：20-VSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：20-HTSSOP-B
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The BD9P105EFV-CE2 is a buck DC/DC converter IC from ROHM Semiconductor. It operates with an input voltage range of 3.5V to 40V and provides an adjustable output voltage between 0.8V and 8.5V. The device delivers a maximum output current of 1.0A and functions at a switching frequency of 2.2MHz. It supports an operating temperature range from -40°C to +125°C.
Feature Summary
- Utilizes Nano Pulse Control technology for stable step-down conversion with high efficiency.
- Features spread spectrum functionality to reduce electromagnetic interference (EMI) noise.
- Provides fast response performance to maintain stable power supply during battery startup conditions.
Applications
- Automotive sensor systems including ADAS, cameras, and radar
- In-vehicle infotainment units
- Instrument cluster displays
- Body control modules (BCM)
Procurement Notes
Verify the complete part number including the suffix CE2 to ensure correct packaging and automotive qualification status. Confirm that the HTSSOP-B20 package matches the target PCB footprint. Check the datasheet for specific functional safety support categories required for the application design.
Selection Notes
Select this component when a wide input voltage range up to 40V is required for automotive primary DC/DC conversion. It is suitable for designs prioritizing EMI reduction through spread spectrum operation. Ensure the 1.0A output current meets the load requirements while maintaining the specified thermal performance within the -40°C to +125°C range.
Part Context
This device belongs to the BD9P series of ROHM Semiconductor, which are automotive-grade primary DC/DC converters rated for 42V withstand voltage. The series is designed to support system miniaturization and high reliability standards in modern vehicle electronics by combining high efficiency with compact external component requirements.
Replacement Considerations
Check the official ROHM product comparison tools for direct pin-compatible or functionally equivalent alternatives within the BD9P family. Verify that any substitute maintains the same 40V input rating and automotive qualification standards.
