MP9929 7-18V, 100kHz Synchronous Step-Down Controller QFN-26

MP9929 7-18V, 100kHz Synchronous Step-Down Controller QFN-26

Key Specifications

Features

• Up to 100V of Input Voltage (VIN)
• 7V to 18V VDRV Voltage (VDRV) Range
• Dual N-Channel MOSFET Driver
• Low-Dropout (LDO) Operation: Maximum Duty Cycle at 99.5%
• Configurable Frequency Range: 100kHz to 1000kHz
• 180° Out-of-Phase SYNCO
• External Soft Start (SS) and PG Pin
• Selectable Cycle-by-Cycle Current Limit
• Output Over-Voltage Protection (OVP)
• Configurable Continuous Conduction Mode (CCM), Advanced Asynchronous Modulation (AAM) Mode, and Pulse-Skip Mode (PSM)

Applications

• Power Delivery (PD) Power Supply in Power over Ethernet (PoE) Systems
• USB Dedicated Charging Ports (DCPs)
• Energy Storage Systems (ESS)
• Industrial Control Systems

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.
• Package QFN-26 — check the land pattern in the datasheet before layout.

Common Questions