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Product Detailed Parameters
- Description：IC REG BUCK 1.2V 1A 8HTSOP-J
- 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)：2.69V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：-
- Current - Output：1A
- Frequency - Switching：2.25MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-HTSOP-J
- Grade：-
- Qualification：-
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Overview
The BD90571EFJ-CE2 is a synchronous step-down converter manufactured by ROHM Semiconductor. It operates within an input voltage range of 2.69V to 5.5V and provides a fixed 1.2V output. The device supports a load current of 1A and utilizes a switching frequency of 2.25MHz. It is housed in an 8-HTSOP-J package with an exposed pad for surface mount installation.
Feature Summary
- Integrates synchronous rectification for improved efficiency
- Supports wide input voltage operation from 2.69V to 5.5V
- Utilizes high-frequency switching to minimize external component size
Applications
- Portable battery-powered devices
- Embedded systems requiring stable low-voltage power rails
- Consumer electronics with limited board space
Procurement Notes
Verify the specific suffix CE2 against the manufacturer's latest documentation to confirm package type and tape/reel specifications. Ensure compatibility with the target PCB footprint, specifically the HTSOP-J8 exposed pad thermal requirements. Cross-reference the part number with official ROHM distributors to confirm current production status and availability constraints.
Selection Notes
Select this component when a fixed 1.2V rail is required from a single-cell lithium-ion or similar battery source. The 2.25MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the 1A current limit and thermal performance through the exposed pad for the intended application environment.
Part Context
This part belongs to the BD90571 family of synchronous buck converters. It is designed for applications requiring compact power solutions with high efficiency. The fixed output configuration simplifies design implementation by removing the need for external feedback resistors typically used in adjustable regulators.
Replacement Considerations
Consult ROHM official documentation for qualified substitutes. Verify pinout compatibility and electrical parameters such as input voltage range and output current capability before replacing.
