ZCC5145   0.6A  45V  DC/DC降压IC  替代HT7463 替代SY8401

1 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.

2  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

3  APPLICATIONS

• Power Meters

• Distributed Power Systems

 •Battery Chargers

 •Pre-Regulator for Linear Regulators

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