DESCRIPTION

The MP2459 is a monolithic, step-down, switch-mode 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 cycle­by­cycle 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