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Product Detailed Parameters
- Description：IC REG BUCK 3.3V 1A 6WLCSP
- 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)：4V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Current - Output：1A
- Frequency - Switching：6MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：6-XFBGA, WLCSP
- Supplier Device Package：6-WLCSP
- Grade：-
- Qualification：-
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Overview
The BU90002GWZ-E2 is a step-down switching regulator with an integrated power MOSFET, manufactured by ROHM Semiconductor. It operates within an input voltage range of 4 V to 5.5 V and provides a fixed output voltage of 3.3 V at a maximum current of 1 A. The device supports a switching frequency between 5.4 MHz and 6.6 MHz and functions in temperatures from -40°C to +85°C. It features automatic PFM/PWM operation for light loads, forced PWM mode, internal soft start, and under-voltage lockout.
Feature Summary
- Integrates controller and power FET in a synchronous buck topology
- Supports automatic transition between PFM and PWM modes for efficiency optimization
- Includes internal soft start and under-voltage lockout protection
Applications
- Portable electronic devices requiring compact power solutions
- Battery-powered systems operating within 4V to 5.5V input ranges
- Embedded applications needing high-efficiency voltage regulation
Procurement Notes
Verify the specific suffix E2 against official ROHM documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status directly from the datasheet. Check for any obsolescence notices or lifecycle changes prior to procurement decisions.
Selection Notes
Select this component when a small footprint and high efficiency are required for 3.3V output generation. Ensure the application environment stays within the specified -40°C to +85°C temperature range. Verify that the input voltage does not exceed 5.5V to prevent damage.
Part Context
This part belongs to the BU90002 series of high-efficiency buck regulators. It is designed for space-constrained applications where integrated power stages reduce external component count. The UCSP35L1-6 package allows for minimal PCB area usage compared to traditional discrete solutions.
Replacement Considerations
Check ROHM's official substitution guide for equivalent parts within the same series. Ensure any replacement maintains the 3.3V fixed output and 1A current capability.
