NB669GQ-Z NB669G AE* Marking MPS IC AEVD AEVE AEVF AEVC

NB669GQ-Z NB669G AE* Marking MPS IC AEVD AEVE AEVF AEVC is a fully integrated high-frequency synchronous buck converter with a fixed 5V output. It supports 6A continuous and 9A peak load with excellent line/load regulation across a wide input range. The COT control ensures fast transient response and simple compensation. The IC includes UVLO (4.15V), open-drain power-good output, a 5V LDO for peripherals, and a 300kHz clock for driving external charge pumps. It features full protections (OCP/OVP/UVP/thermal) and requires minimal external parts. Package: QFN-16 (3×3 mm).

• AEVD NB669GQ-Z Standard version – most common 2023–2025
• AEVE NB669GQ-Z Same IC – newer batch (2024–2025)
• AEVF NB669GQ-Z Same IC – latest batch (2025+)
• AE  NB669GQ-Z Old marking 2022–early 2023
• AEVC NB669GQ-Z Standard version – most common 2024

Key Technical Specifications:

• Input Voltage: 4.5V to 24V (supports 5V, 12V, 19V rails)
• Output Current: 6A continuous, 9A peak
• Integrated MOSFETs: High-side 45mΩ, Low-side 25mΩ (typ)
• Switching Frequency: Programmable 300kHz–1MHz (via resistor)
• Efficiency: Up to 95% at 12V → 5V/6A
• Control Mode: COT with forced CCM or auto PFM/PWM for light-load efficiency
• Output Voltage: Adjustable from 0.604V (VFB ref) to 5.5V
• Protections: Valley current limit (OCP), OVP, UVLO, thermal shutdown (165°C), Power Good open-drain output
• Package: Ultra-compact QFN-16 (3×3mm), thermally enhanced
• Operating Temp: –40°C to +125°C

Applications: Laptop CPU/GPU rails, SSD, USB PD, industrial sensors, networking.

Marking Note: AEVD / AEVE / AEVF / AE / AEVC = same IC; second line = date code only.