MP9928 4-60V, 100kHz Synchronous Step-Down Controller TSSOP20

MP9928 4-60V, 100kHz Synchronous Step-Down Controller TSSOP20

Key Specifications

Features

• Wide 4V to 60V Operating Input Range
• Dual N-Channel MOSFET Driver
• Low Dropout Operation: Maximum Duty Cycle at 99.5%
• Programmable Frequency Range: 100kHz - 1000kHz
• 180º Out-of-Phase SYNCO
• External Soft-Start and PG Pin
• Selectable Cycle-by-Cycle Current Limit
• Output Over Voltage Protection
• Internal LDO with Externally Power Supply Option
• Programmable CCM and AAM Pulse- Skipping Mode

Applications

• PD Power Supply in PoE System
• USB Dedicated Charging Port (DCP)
• 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.
• Power switches are integrated, so the thermal path is the PCB copper under the pad.
• Package TSSOP20 — check the land pattern in the datasheet before layout.

Common Questions