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Product Detailed Parameters
- Description：IC REG BUCK 1.8V 1A UCSP30L1
- 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)：2.3V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Current - Output：1A
- Frequency - Switching：4.8MHz ~ 6MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：6-XFBGA, CSPBGA
- Supplier Device Package：UCSP30L1
- Grade：-
- Qualification：-
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Overview
The BU90054GWZ-E2 is a CMOS over-voltage detector IC and step-down switching regulator with an integrated power MOSFET. It operates within an input voltage range of 2.3 V to 5.5 V, providing a fixed output voltage of 1.8 V at a maximum output current of 1 A. The device features a switching frequency between 4.8 MHz and 6 MHz and a typical quiescent current of 45 µA. It supports shutdown functionality and functions reliably across an operating temperature range from -40 °C to +85 °C.
Feature Summary
- Integrates a synchronous buck converter topology with an internal power FET for compact design.
- Supports forced PWM operation mode to maintain stable switching under light load conditions.
- Includes internal soft-start circuitry to limit inrush current during startup.
Applications
- Portable electronic devices requiring efficient step-down regulation
- Battery-powered systems utilizing lithium-ion or lithium-polymer cells
- Embedded circuits needing low quiescent current operation
Procurement Notes
Verify the specific suffix E2 against the manufacturer's latest datasheet to confirm package type and RoHS compliance status. Confirm availability as this component may be subject to production lifecycle changes. Ensure the UCSP-6 package dimensions match your PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component when a fixed 1.8 V output is required from a 2.3 V to 5.5 V input source. The integrated FET eliminates external gate drive components. Consider the 45 µA quiescent current for battery life optimization. Verify that the 4.8 MHz to 6 MHz switching frequency aligns with electromagnetic interference constraints in the target application environment.
Part Context
This part belongs to the BU90054GWZ series of high-efficiency buck regulators. It is designed for space-constrained applications where integrating the controller and power switch reduces board area. The UCSP-6 package provides a small form factor suitable for dense PCB layouts in consumer electronics and portable instrumentation.
Replacement Considerations
Check for BU90004GWZ variants if different output voltages are needed. Verify pin compatibility with alternative ROHM buck regulators offering similar current ratings and package styles before substitution.
