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NB671LB 4.5-24V, 6A Synchronous Step-down Converter QFN16
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pMPS NB671LB — synchronous step-down converter, 4.5-24V input, 6A output, QFN16./p
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NB671LB 4.5-24V, 6A Synchronous Step-down Converter QFN16
MPS NB671LB is a synchronous step-down converter that accepts 4.5 V to 24 V input, delivers 6 A, supplied in a QFN16 package.
Key Specifications
| Part Number | NB671LB |
| Input Voltage | 4.5 V to 24 V |
| Output Current | 6 A |
| Quiescent Current | 120 uA |
| Topology | Synchronous Step-down Converter |
| Package | QFN16 |
| Ordering Codes | NB671LB |
Features
- Wide 4.5V to 24V Operating Input Range
- 6A Continuous Output Current
- 9A Peak Output Current
- 120μA Quiescent Current
- Low RDS(ON) Internal Power MOSFETs
- Proprietary Switching Loss Reduction Technique
- 1% Reference Voltage
- Internal Soft Start
- Output Discharge
- 500kHZ Switching Frequency
Applications
- Laptop Computer
- Tablet PC
- 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 QFN16 — check the land pattern in the datasheet before layout.
Common Questions
What is the input and output rating of the NB671LB?
4.5–24 V input and 6 A output.
Which package is the NB671LB available in?
QFN16.
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