MPQ8634B 2.85-16V, 20A, 600kHz Step-Down Converter QFN-21

MPQ8634B 2.85-16V, 20A, 600kHz Step-Down Converter QFN-21

Key Specifications

Features

• Wide Input Voltage Range: o 2.85V to 16V with External 3.3V VCC Bias o 4V to 16V with Internal VCC Bias or External 3.3V VCC Bias
• Differential Output Voltage Remote Sense
• Programmable Accurate Current Limit Level
• 20A Output Current
• Low RDS(ON) Integrated Power MOSFETs
• Proprietary Switching Loss Reduction Technique
• Adaptive COT for Ultrafast Transient Response
• Stable with Zero ESR Output Capacitor
• 0.5% Reference Voltage over 0°C to +70°C Junction Temperature Range
• 1% Reference Voltage from -40°C to +125°C Junction Temperature Range

Applications

• Telecom and Networking Systems
• Servers, Cloud-Computing, Storage
• Base Stations
• General Purpose Point-of-Load (PoL)
• 12V Distribution Power Systems
• High-end TV

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 QFN-21 — check the land pattern in the datasheet before layout.

Common Questions