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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 1A 20HTSSOP-B
- 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)：3.3V
- Voltage - Output (Max)：-
- 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 BD9P135EFV-CE2 is a buck DC/DC converter IC from ROHM Semiconductor, designed for automotive applications. It features an input voltage range of 3.5V to 40V and provides a fixed 3.3V output at up to 1.0A. The device operates with a switching frequency of 2.2MHz and supports an extended operating temperature range from -40°C to +125°C.
Feature Summary
- Integrates Nano Pulse Control technology for stable step-down conversion with high efficiency.
- Includes spread spectrum functionality to reduce electromagnetic interference (EMI) noise.
- Features fast response capabilities to maintain stable power supply 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 complete part number including the suffix CE2 to ensure correct packaging and automotive qualification status. Confirm that the required output voltage matches the fixed 3.3V specification, as this variant does not offer adjustable output options. Cross-reference the datasheet for thermal performance requirements under specific load conditions.
Selection Notes
Select this component when a compact, high-efficiency synchronous buck converter is needed for 42V automotive networks. It is suitable for designs requiring low EMI through spread spectrum operation and robust performance during cold cranking or load dump scenarios. Ensure the PCB layout supports the 2.2MHz switching frequency for optimal noise reduction.
Part Context
This IC belongs to the BD9P series of primary DC/DC converters rated for 42V automotive systems. The series emphasizes miniaturization and reliability for safety-critical vehicle electronics. The BD9P135EFV-CE2 specifically targets applications demanding precise 3.3V regulation with integrated control and power stages in a small package.
Replacement Considerations
Check for pin-compatible alternatives within the BD9P series, such as variants with different fixed output voltages or current ratings. Verify functional equivalence regarding Nano Pulse Control behavior and EMI characteristics before substitution.
