The HT2451 is a monolithic, step-down, switchmode converter with a built-in power MOSFET. It achieves a 0.6A peak-output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides a fast transient response and eases loop stabilization. Fault condition protections include cycle-by-cycle current limiting and thermal shutdown.
The HT2451 requires a minimal number ofreadily-available external components.
The HT2451 is available in a SOT23-6 package.
• Wide Operating Input Range：4.5V to 40V
• Output Adjustable from 0.81V to 0.95*VIN
• 0.6A Peak Output Current
• 0.5Ω Internal Power MOSFET
• Stable with Low-ESR Ceramic Output Capacitors
• Up to 90% Efficiency
• 0.1μA Shutdown Mode
• Fixed 1.8MHz Frequency
• Thermal Shutdown
• Cycle-by-Cycle Over-Current Protection
• Available in a SOT23-6 Package
