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NB680 4.8-28V, 8A, 250kHz Synchronous Buck Converter QFN-12
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pMPS NB680 — synchronous buck converter, 4.8-28V input, 8A output, 250 kHz, QFN-12./p
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NB680 4.8-28V, 8A, 250kHz Synchronous Buck Converter QFN-12
MPS NB680 is a synchronous buck converter that accepts 4.8 V to 28 V input, delivers 8 A, switches at 250 kHz, supplied in a QFN-12 package.
Key Specifications
| Part Number | NB680 |
| Input Voltage | 4.8 V to 28 V |
| Output Current | 8 A |
| Switching Frequency | 250 kHz |
| Topology | Synchronous Buck Converter |
| Package | QFN-12 |
| Ordering Codes | NB680 |
Features
- Wide 4.8 V to 28 V Operating Input Range
- Fixed 3.3 V Vout
- Ultrasonic Mode with Fs over 25 kHz
- 100 μA Low Quiescent Current
- 8 A Continous Output Current
- 10 A Peak Output Current
- Adaptive COT for Fast Transient
- DC Auto-Tune Loop
- Stable with POSCAP and Ceramic Output Capacitors
- 250 kHz CLK for External Charge Pump
Applications
- Laptop Computers
- Tablet PCs
- Networking Systems
- Personal Video Recorders
- Flat Panel Television and Monitors
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 QFN-12 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the NB680?
4.8–28 V input and 8 A output.
What switching frequency does the NB680 run at?
250 kHz.
Which package is the NB680 available in?
QFN-12.
Shenzhen Gaorunxin Technology Co., Ltd
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