Description
The NB680 is designed for use in power supply systems (e.g., in notebooks, embedded systems) where a compact, efficient 3.3 V rail is needed from a higher and variable input voltage.
Key Specifications & Capabilities
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Input voltage range (VIN): 4.8 V to 26 V
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Output voltage: Fixed 3.3 V (regulated)
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Continuous output current: 8 A
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Peak (transient) output current: 10 A
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Integrated LDO: 3.3 V LDO with up to 100 mA output capacity
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Control scheme: Adaptive Constant‑On‑Time (COT)
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Auto tuning: Includes a DC auto‑tune loop for good load and line regulation
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Clock output: 250 kHz CLK pin, which can drive an external charge pump
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Switching frequency: ~700 kHz nominal
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Quiescent current: ~100–140 µA typical
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Protection & Safety Features:
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Over-current limit (OCL / OCP)
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Over-voltage protection (OVP)
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Under-voltage protection (UVP)
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Thermal shutdown
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Output discharge on shutdown / faults
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Operating modes / features:
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Ultrasonic mode to avoid audible switching at light loads
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Soft‑start at startup
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Latch-off reset via EN or power cycling
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Package: QFN‑12, dimensions ~2 mm × 3 mm
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Enable pins: Two enable inputs (EN, ENCLK) to control the buck and clock functions independently
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Other features: Input under-voltage lockout (UVLO), internal reference (1% accuracy), built-in output switching between buck output and LDO as needed
No Return / No Exchange Policy / No Warranty.
Please check the model number and match it with your Product.
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