The HT2459 is a monolithic step-down switch mode converter with a built-in power MOSFET. It achieves 0.5A 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 HT2459 requires a minimum number of readily available standard external components.

The HT2459 is available in SOT23-6 packages.

• 0.5A Peak Output Current

• 1Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic Capacitors

• Up to 90% Efficiency

• 0.1μA Shutdown Mode

• Fixed 480KHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.5V to 60V Operating Input Range

• Output Adjustable from 0.81V to 0.95*Vin

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