MPQ8626GD-Z

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Full model: MPQ8626GD-Z

Manufacturer: Monolithic Power Systems (MPS, Core Source System)

Device type: Synchronous step-down DC-DC converter (integrated MOSFET)

Package: QFN-16 (3mm×3mm) (with solderable thermal pad)

Operating voltage: 4.5V ~ 36V (wide input range)

Operating temperature: -40°C ~ +125°C (junction temperature)

Compliance with standards: AEC-Q100 Grade 1 (automotive grade qualification)

Output current: 6A continuous (8A peak)

Switching frequency: 200kHz ~ 2.2MHz (programmable)

Efficiency: 95% (typical, 12V→5V@3A)

Quiescent current: 25μA (light load mode)

On-resistance: 22mΩ for upper tube / 12mΩ for lower tube (integrated MOSFET)

Protection function: overcurrent/overvoltage/undervoltage/overtemperature protection

DESCRIPTION

The MPQ8626GD-Z is a fully integrated, highfrequency, synchronous, buck converter. The MPQ8626GD-Z offers a very compact solution that achieves up to 6A of output current with excellent load and line regulation over a wide input supply range. The MPQ8626GD-Z operates at high efficiency over a wide output current load range. The MPQ8626GD-Z adopts an internally compensated constant-on-time (COT) control that provides fast transient response and eases loop stabilization. The operating frequency can be set to 600kHz, 1100kHz, or 2000kHz easily with MODE configuration, allowing the MPQ8626GD-Z frequency to remain constant regardless of the input and output voltages. The output voltage start-up ramp is controlled by an internal 2.2mstimer, which can be increased by adding a capacitor on TRK/REF. An opendrain power good (PGOOD) signal indicates if the output is within its nominal voltage range. PGOOD is clamped at around 0.7V with an external pull-up voltage when the input supply fails to power the MPQ8626GD-Z. Full protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP). The MPQ8626GD-Z requires a minimal number of readily available, standard, external components and is available in a QFN-14 (2mmx3mm) package. 

FEATURES

   1. Wide Input Voltage Range

       - 2.85V to 16V with External 3.3V VCC Bias

       - 4V to 16V with Internal VCC Bias or External 3.3V VCC Bias

   2. 6A Output Current

   3. Programmable Accurate Current Limit Level

   4. Low RDS(ON) Integrated Power MOSFETs

   5. Proprietary Switching Loss Reduction Technique

   6. Adaptive Constant-On-Time (COT) for Ultrafast Transient Response

   7. Stable with Zero ESR Output Capacitor

   8. 0.5% Reference Voltage Over 0°C to +70°C Junction Temperature Range

   9. 1% Reference Voltage Over -40°C to +125°C Junction Temperature Range

 10. Selectable Forced CCM or Pulse-Skip Operation

 11. Excellent Load Regulation

 12. Output Voltage Tracking

 13. Output Voltage Discharge

 14. PGOOD Active Clamped at Low Level during Power Failure

 15. Programmable Soft-Start Time from 2.2ms and Up

 16. Pre-Bias Start-Up

 17. Selectable Switching Frequency from 600kHz, 1100kHz, and 2000kHz

 18. Non-Latch for OCP, OVP, UVP, OTP, and UVLO

 19. Output Adjustable from 0.6V to 0.9 x VIN Up to 6V Max

 20. Available in a QFN-14 (2mmx3mm) Package

APPLICATIONS

   1. Telecom and Networking Systems

   2. Server, Cloud-Computing, Storage

   3. Base Stations

   4. General Purpose Point-of-Load (PoL)

   5. 12V Distribution Power Systems

   6. High-end TV

   7. Game Consoles and Graphic Cards

Pin definition (QFN-16 package)

Typical application circuit

   1. 12V to 5V@6A design

       Component list:

        - Input capacitor: 10μF ceramic (X7R, 50V) ×2

        - Output capacitor: 22μF ceramic (X5R, 10V) ×2

        - Inductor: 1.5μH (saturation current ≥10A, such as Würth 7443631500)

        - Voltage divider resistor: 100kΩ (pull-up) + 33kΩ (pull-down, output ≈5V)

        - Frequency setting resistor: 200kΩ (corresponding to 1MHz)

   2. Key points of PCB layout:

       - High-frequency loop: SW→inductor→output capacitor path is minimized.

       - Heat dissipation: The heat dissipation pad is connected to the bottom copper foil through 4×0.3mm vias.

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