M3 Technology (M3Tek) MT3998M | Demoboard MT3998M Demo

Description

The MT3998 is a fully integrated high efficiency synchronous step-down converter which requires a minimum number of external components. It offers a very compact solution with 8A continuous output current over a wide input range. The MT3998 employs proprietary Constant On-Time (COT) control scheme providing superior transient response and maintaining constant switching frequency in the continuous conduction mode operation. The external ramp compensation network allows stable operation with ultra-low equivalent series resistance (ESR) output ceramic capacitors. An error amplifier in the control loop provides excellent line and load regulation.

Features

• Input Voltage Range from 3V to 28V.
• ±1% 0.6V Feedback Voltage Accuracy
• 8A continuous output current
• Support 100% duty cycle Low Dropout Operation
• Stable operation with output low ESR ceramic capacitors
• Fast PWM COT control with superior transient performance
• External Programmable and Synchronizable Switching frequency: 200KHz to 1.2MHz
• Selectable Ultrasonic (UA) Mode or Pulse-Skip Mode (PSM) for High Light Load Efficiency
• Integrate 20mΩ/10mΩ HS/LS Power Switches for QFN 3mmx3mm_16L Integrate 28mΩ/17mΩ HS/LS Power Switches for QFN 4mmx4mm_20L
• Accurate 1.26V EN threshold with 280mV Hysteresis
• 130µA Low Quiescent Current in PSM mode
• Internal fixed or External programmable Soft-start Time
• Output Discharging Function in Shutdown
• Thermal Shutdown
• Hiccup Mode Short Circuit Protection
• Small 4mmx4mm 20 lead QFN / 3mmx3mm 16 lead QFN packages

Typical applications

• Industrial PC,
• Distributed Power Systems
• Flat Panel Television and Monitors
• Networking Systems

More information

• IC product information