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Product Detailed Parameters
- Description：IC REG BUCK 1.15V 600MA 8VSON
- 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)：2.7V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.15V
- Voltage - Output (Max)：-
- Current - Output：600mA
- Frequency - Switching：2.2MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-UFDFN Exposed Pad
- Supplier Device Package：VSON008X2020
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The BD9SD11NUX-CE2 is a single synchronous buck DC/DC converter from ROHM Semiconductor, designed for automotive applications with AEC-Q100 Grade 1 qualification. It operates within an input voltage range of 2.7 V to 5.5 V and provides a fixed output voltage of 1.15 V at a maximum current of 600 mA. The device features a switching frequency of 2.2 MHz and functions across a temperature range of -40°C to +125°C. Quiescent current is specified at 400 uA, and it utilizes a VSON-8 package.
Feature Summary
- Integrated low on-resistance power MOSFETs for high efficiency
- Current mode control architecture enabling fast transient response
- Built-in feedback resistors and phase compensation circuits
- Comprehensive protection mechanisms including UVLO, SCP, OVP, and OCP
Applications
- Automotive infotainment systems
- Instrument cluster power supplies
- Body electronics modules
- ADAS sensor biasing
Procurement Notes
Verify the specific suffix CE2 against the official ROHM datasheet to confirm pinout and thermal characteristics. Ensure the application environment meets the AEC-Q100 Grade 1 requirements for automotive reliability. Confirm that the 600 mA load does not exceed thermal limits in the VSON-8 package under worst-case operating conditions.
Selection Notes
Select this component when a fixed 1.15 V rail is required for automotive-grade loads. The integrated feedback network reduces external component count compared to adjustable variants. Consider the 2.2 MHz frequency for smaller inductor sizes while balancing EMI constraints. Verify compatibility with existing PCB footprints for the VSON-8 package.
Part Context
This part belongs to the BD9S series of synchronous buck converters optimized for automotive use. It shares the same topology and package as other members like the BD9S100NUX-CE2 but differs in output current capacity and fixed voltage settings. The series supports functional safety analysis as an FS supportive product.
Replacement Considerations
Direct substitutes include BD9SD11NUX-C (same electrical specs, different packaging suffix). For higher current needs, consider BD9S231NUX-CE2. For lower current, BD9S000NUX-CE2 offers 600 mA with adjustable output.
