The HT2451 is a monolithic step-down switch mode converter with a built-in power MOSFET. It achieves 0.6A peak
output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown.
The HT2451 requires a minimum number of readily available standard external components.
The HT2451 is available in SOT23-6 packages.
• 0.6A Peak Output Current
• 500mΩ Internal Power MOSFET Switch
• Stable with Low ESR Output Ceramic Capacitors
• Up to 90% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.8MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Wide 4.5V to 40V Operating Input Range
• Output Adjustable from 0.81V to 0.95*Vin
