DESCRIPTION 

The MP2459 is a monolithic, step-down, switchmode converter with a built-in power MOSFET. It achieves a 0.5A 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 MP2459 requires a minimal number of readily-available external components. The MP2459 is available in a TSOT23-6 package.

FEATURES

• 0.5A Peak Output Current

• 1Ω Internal Power MOSFET

• Stable with Low-ESR Ceramic Output

Capacitors

• Up to 90% Efficiency

• 0.1μA Shutdown Mode

• Fixed 480kHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over-Current Protection

• Wide 4.5V-to-55V Operating Input Range

• Output Adjustable from 0.81V to 0.95*VIN

• Available in a TSOT23-6 Package

APPLICATIONS

• Power Meters

• Distributed Power Systems

• Battery Chargers

• Pre-Regulator for Linear Regulators

• WLED Drivers