Description
The SY8208BQNC integrates a high-efficiency buck regulator with internal switches and supports a wide input voltage range, making it suitable for applications such as notebooks, set-top boxes, and other electronics requiring stable lower voltages.
✅ Key Specifications & Features
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Input voltage range: 4 V to 28 V
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Delivers 8 A continuous current and 16 A peak (for transient loads)
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Internal MOSFETs with low on-resistance: ~20 mΩ (high-side) / ~10 mΩ (low-side)
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Instant-PWM architecture for fast transient response
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Pseudo‑constant switching frequency: ~800 kHz in continuous conduction mode
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Soft-start time: ~400 µs to limit inrush current at startup
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Package: QFN, 3 × 3 mm, 10-pin (QFN3x3-10)
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Protection and features:
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Over-current protection (OCP)
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Over-voltage protection (OVP)
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Thermal shutdown
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Output discharge at shutdown
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Internal compensation (no external loop components needed)
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⚙ Typical Use / Applications
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Provides stable rails in notebooks, monitors, set-top boxes, and other embedded systems
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Often used for generating 3.3 V or similar core voltages from higher bus voltages
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In repair forums, people have identified this part (marking “MS3”) on laptop boards labeled “PU401,” supplying 3.3 V output
No Return / No Exchange Policy / No Warranty.
Please check the model number and match it with your Product.
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