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Product Detailed Parameters
- Description：IC REG BUCK 1V 1A UCSP35L1
- 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)：1V
- Voltage - Output (Max)：-
- Current - Output：1A
- Frequency - Switching：3.6MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：6-XFBGA, CSPBGA
- Supplier Device Package：UCSP35L1
- Grade：-
- Qualification：-
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Overview
The BU90008GWZ-E2 is a step-down switching regulator manufactured by ROHM Semiconductor, classified under PMIC - Power Management ICs. It utilizes a Buck topology and is housed in a UCSP35L1-6 surface-mount package. The device supports an input voltage range of 2.3 V to 5.5 V and provides a fixed output voltage of 1 V with a maximum output current of 1 A. It features a single output channel and operates within a temperature range of -40°C to +85°C. Key electrical specifications include a static current of 45 µA and a switch frequency between 3.2 MHz and 4 MHz. The component includes shutdown functionality.
Feature Summary
- Integrates a synchronous buck converter topology for efficient step-down voltage regulation.
- Features automatic transition between PFM and PWM modes to optimize efficiency across varying load conditions.
- Incorporates internal protection mechanisms including over-current protection and thermal shutdown.
Applications
- Portable electronic devices requiring compact power management solutions
- Battery-powered systems utilizing single-cell lithium-ion or lithium-polymer sources
- Embedded circuits needing regulated 1V supply rails from 3.7V nominal sources
Procurement Notes
Verify the End-of-Life (EOL) status before procurement, as the manufacturer indicates this part is obsolete and will be discontinued. Confirm availability through authorized distributors only, as stock levels may be limited or non-existent. Ensure that the UCSP35L1-6 package footprint matches your PCB design constraints. Review the latest datasheet for any final manufacturing changes prior to integration into production schedules.
Selection Notes
Select this component when a fixed 1V output is required from a 2.3V to 5.5V input source. It is suitable for applications prioritizing small board space due to the UCSP35L1-6 package. Consider the 45 µA static current for battery life requirements. Verify that the 1A output current meets the load demands. Compare against other BU9000x series parts if different output voltages or currents are needed.
Part Context
This part belongs to the BU9000x series of 1.0A output FET-integrated high-efficiency buck switching regulators from ROHM. These components are designed for portable equipment, offering integrated high-side Pch and low-side Nch MOSFETs to minimize external component count. The series typically features automatic PFM/PWM operation and various protection functions, targeting space-constrained mobile and consumer electronics applications.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Due to the EOL status, alternative sourcing should focus on verifying compatibility with similar ROHM buck regulators or consulting the manufacturer for recommended obsolescence replacements.
