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NB648 4.5-25V, 8A, 580kHz Synchronous Step-down Converter QFN30
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pMPS NB648 — synchronous step-down converter, 4.5-25V input, 8A output, 580 kHz, QFN30./p
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NB648 4.5-25V, 8A, 580kHz Synchronous Step-down Converter QFN30
MPS NB648 is a synchronous step-down converter that accepts 4.5 V to 25 V input, delivers 8 A, switches at 580 kHz, supplied in a QFN30 package.
Key Specifications
| Part Number | NB648 |
| Input Voltage | 4.5 V to 25 V |
| Output Current | 8 A |
| Switching Frequency | 580 kHz |
| Topology | Synchronous Step-down Converter |
| Package | QFN30 |
| Ordering Codes | NB648 |
Features
- Wide 4.5V to 25V Operating Input Range
- 8A Output Current
- Low RDS(ON) Internal Power MOSFETs
- Proprietary Switching Loss Reduction Technique
- Fixed 580kHz Switching Frequency
- Sync from 300kHz to 2MHz External Clock
- Internal Compensation
- OCP Protection and Thermal Shutdown
- Output Adjustable from 0.8V to 15V
- Available in 30-pin QFN 5x6mm Package
Applications
- Notebook Systems and I/O Power
- Networking Systems
- Digital Set Top Boxes
- Personal Video Recorders
- Flat Panel Television and Monitors
- Distributed Power Systems "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.
Design Notes
- The step-down topology needs an inductor and output capacitor sized for the ripple at the switching frequency, not just the DC load.
- Keep the input loop short — high di/dt at the switch node sets conducted EMI.
- Power switches are integrated, so the thermal path is the PCB copper under the pad.
- Package QFN30 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the NB648?
4.5–25 V input and 8 A output.
What switching frequency does the NB648 run at?
580 kHz.
Which package is the NB648 available in?
QFN30.
Shenzhen Gaorunxin Technology Co., Ltd
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