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DESCRIPTION The ZCC5145 is a monolithic, step-down, switch- mode 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 ZCC5145 requires a minimal number of readily-available external components. The ZCC5145 is available in a TSOT23-6 package. FEATURES 0.6A Peak Output Current 0.6Ω Internal Power MOSFET Capable to Start Up with Big Output Capacitor Stable with Low-ESR Ceramic Output Capacitors Up to 94% Efficiency Fixed 1.2MHz Frequency Cycle-by-Cycle Over-Current Protection Wide 4.2V-to-45V Operating Input Range Output Adjustable from 4.5V to 0.94xVIN Available in a SOT23-6 Package APPLICATIONS Power Meters Distributed Power Systems Battery Chargers Pre-Regulator for Linear Regulators |
