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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A UMMP008AZ020
- Series：-
- Mfr：Rohm Semiconductor
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：2.7V
- Voltage - Input (Max)：5.5V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：3.85V
- Current - Output：3A
- Frequency - Switching：1MHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-XFDFN Exposed Pad
- Supplier Device Package：UMMP008AZ020
- Grade：-
- Qualification：-
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Overview
The BD9A302QWZ-E2 is a synchronous buck DC/DC converter IC from ROHM Semiconductor, featuring an integrated 3A power MOSFET. It operates with an input voltage range of 2.7V to 5.5V and provides an adjustable output voltage from 0.8V. The device utilizes a constant on-time control method for fast transient response and low standby power consumption. Key electrical parameters include a switching frequency of 1MHz, a quiescent current of 10uA, and operation within a temperature range of -40°C to +85°C. The component is housed in an XFDFN-8 package.
Feature Summary
- Integrates a 3A synchronous power MOSFET for compact design
- Employs constant on-time control for rapid transient response
- Optimized for low standby power consumption during light loads
Applications
- Portable electronic devices requiring efficient power management
- Battery-powered systems needing extended operational life
- Embedded applications with strict space constraints
Procurement Notes
Verify the specific ordering suffix and package variant against the official ROHM datasheet to ensure compatibility with your PCB footprint and thermal requirements. Confirm that the requested quantity aligns with standard factory packaging specifications such as reels or cut tape options provided by authorized distributors. Cross-reference the manufacturer part number with any alternative designations to prevent procurement errors.
Selection Notes
Select this component when a high-efficiency, small-footprint solution is required for low-voltage input applications. The integrated MOSFET simplifies the bill of materials and reduces layout complexity compared to discrete solutions. Consider the 1MHz switching frequency for balancing component size and electromagnetic interference, ensuring it meets the system's noise sensitivity requirements.
Part Context
This part belongs to the BD9A series of integrated MOSFET DC-DC converters from ROHM. These devices are designed for applications demanding high efficiency and fast transient response. The series leverages constant on-time control technology to maintain stability under varying load conditions while minimizing power loss during idle periods, making it suitable for modern portable electronics.
Replacement Considerations
Check for direct substitutes within the BD9A series that offer compatible input/output ranges and current ratings. Ensure any replacement maintains the same package type or verify pin-to-pin compatibility if form-factor changes are acceptable. Consult official cross-reference guides for verified alternatives.
