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Product Detailed Parameters
- Description：IC REG BUCK 5V 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)：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
- 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 BD9P155EFV-CE2 is a synchronous buck DC/DC converter from ROHM Semiconductor, designed for automotive applications. It features a wide input voltage range of 3.5 V to 40 V and provides a fixed 5.0 V output at up to 1.0 A. Operating with a switching frequency of 2.2 MHz, the device utilizes Nano Pulse Control technology for high efficiency and fast transient response. It includes a shutdown function and operates within an extended temperature range of -40 °C to +125 °C. The IC is housed in an HTSSOP-B20 package.
Feature Summary
- Integrates power MOSFETs and controller in a single synchronous buck topology
- Utilizes Nano Pulse Control technology for stable step-down ratios and low EMI via spread spectrum
- Supports wide input voltage ranges suitable for automotive battery systems
- Features low quiescent current operation to minimize standby power consumption
Applications
- Automotive ADAS sensor power supplies
- Vehicle camera system power regulation
- Radar unit power management
- In-vehicle infotainment subsystems
- Body control module (BCM) power distribution
Procurement Notes
Verify the specific suffix CE2 against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure the ordering part number matches the required package variant. Cross-reference the component marking code with official documentation to prevent counterfeit substitution during assembly.
Selection Notes
Select this component when a fixed 5 V output is required from a wide automotive input range. The 1 A output current capacity suits moderate load applications. Consider the 2.2 MHz frequency for balancing component size and efficiency. Verify thermal requirements for the HTSSOP-B20 package under maximum load conditions.
Part Context
This device belongs to the BD9P series of integrated MOSFET DC/DC converters. The series is characterized by constant on-time control for rapid transient response. It targets automotive primary DC/DC converter needs, emphasizing small footprint and high reliability for safety-critical vehicle electronics.
Replacement Considerations
Check for BD9P155EFV-C as a potential base model variant. Confirm functional equivalence with other BD9P series parts offering similar input/output specifications before substitution.
