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Product Detailed Parameters
- Description：IC POWER MANAGEMENT
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR)
- Type：-
- Topology：-
- Internal Switch(s)：-
- Number of Outputs：-
- Voltage - Supply (Min)：-
- Voltage - Supply (Max)：-
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：-
- Dimming：-
- Applications：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The BD559BLF-GE2 is a synchronous buck DC-DC converter manufactured by ROHM Semiconductor. It features an input voltage range of 16V to 39V and delivers a fixed 5V output at up to 1A. The device utilizes a constant on-time control method for fast transient response and low standby power consumption. Key electrical parameters include a switching frequency of 400kHz, soft-start functionality to limit inrush current, and operation within a temperature range of -40°C to +85°C. It is housed in an SSOP-14 package.
Feature Summary
- Built-in soft-start functionality to gradually ramp up output current and limit inrush during startup
- Constant on-time control method providing fast transient response and low standby power consumption
- Synchronous buck topology with integrated MOSFETs for efficient step-down conversion
Applications
- Voltage regulation in automotive electronic systems
- Power management for industrial equipment requiring stable 5V rails
- General-purpose DC-DC conversion in embedded systems
Procurement Notes
Verify the specific suffix GE2 against the manufacturer's latest datasheet to confirm pinout and thermal characteristics. Ensure the application circuit supports the 16V minimum input voltage requirement. Confirm that the SSOP-14 package footprint matches the PCB design constraints. Check for any RoHS compliance documentation if required by the end product regulations.
Selection Notes
Select this component when a fixed 5V output from a 16V-39V input source is required with moderate current needs up to 1A. The 400kHz switching frequency allows for smaller external inductors compared to lower-frequency alternatives. Consider the thermal performance of the SSOP-14 package under maximum load conditions. This part is suitable for applications prioritizing simplicity and cost-effectiveness over high-efficiency variable output designs.
Part Context
This component belongs to ROHM's series of integrated MOSFET DC-DC buck converters. These devices are designed to provide compact solutions for power management by combining the controller and power switches in a single package. The series targets applications needing reliable step-down conversion with minimal external components.
Replacement Considerations
Publicly confirmed substitute part numbers for BD559BLF-GE2 were not found in the provided source material. Verify compatibility with alternative parts based on pinout, voltage ratings, and current capabilities.
