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Product Detailed Parameters
- Description：IC REG BUCK 1.23V 1.5A 8VSON
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：2.3V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.23V
- Voltage - Output (Max)：-
- Current - Output：1.5A
- Frequency - Switching：1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-UFDFN Exposed Pad
- Supplier Device Package：VSON008X2030
- Grade：-
- Qualification：-
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Overview
The BU90023NUX-TR is a high-efficiency buck switching regulator manufactured by ROHM Semiconductor. It integrates a 1.5A output FET and controller within a VSON008X2030 package (2.0x3.0mm). The device operates with an input voltage range of 2.3V to 5.5V, providing a fixed output voltage of 1.23V. It supports switching frequencies up to 1MHz and functions within an operating temperature range of -40°C to 85°C.
Feature Summary
- Integrates synchronous buck topology with internal power FETs for compact design
- Features automatic PFM/PWM operation for optimized light-load efficiency
- Includes built-in protection mechanisms such as over-current protection and thermal shutdown
Applications
- Portable electronic devices requiring efficient step-down conversion
- Battery-powered systems utilizing low-voltage inputs
- Embedded circuits needing stable 1.23V supply rails
Procurement Notes
Verify the specific suffix TR indicates tape-and-reel packaging configuration. Confirm the fixed 1.23V output variant matches system requirements, as other output voltages may exist in the series. Ensure compatibility with the VSON008X2030 footprint during PCB layout. Check RoHS compliance status if restricted substances are mandated for the application environment.
Selection Notes
Select this component when a fixed 1.23V output is required from a 2.3V to 5.5V input source. The integrated FET reduces external component count compared to discrete solutions. Consider the 1.5A current limit for load demands. The small VSON package suits space-constrained designs. Verify that the fixed output voltage aligns with downstream logic or sensor requirements without additional regulation.
Part Context
This part belongs to ROHM's BU90023NUX series of high-efficiency buck regulators. It shares the same package and general topology with variants like the BU90028NUX, which differs primarily in its fixed output voltage setting. The series targets applications demanding high power density and efficiency in portable electronics.
Replacement Considerations
BU90028NUX-TR offers similar specifications but provides a different fixed output voltage (1.175V). Direct substitution requires verifying that the target circuit accepts the alternative voltage level. Other BU9002x series members may share pinouts but differ in electrical characteristics.
