400ma/200ma Dual 3.3v Smart Power Switch - Semtech Corporation

The SC1543 provides a glitch free 3.3V output when one of two 3.3V input sources is present. It does not require external Logic to sequence from one input source to the other. Whenever VIN1 exceeds a predetermined threshold value the internal MOSFET connects its source voltage to the output. If the input at VIN1 is below the threshold another internal MOSFET connects VIN2 to the output. If both inputs are at 3.3V then VIN1 will be connected to the output. The SC1543 is designed to provide 400mA from the main input (VIN1) and 200mA from the secondary input (VIN2). A very low quiescent current of 10A in shutdown mode reduces power dissipation. The internal Logic and control circuit detects the voltage levels of VIN1 and VIN2, and compares them to an input reference voltage of 2.9V. An internally controlled period of Switch overlap ensures that the transition between supplies is as glitch-free as possible. The SC1543 is available in an MSOP-8 surface mount package. By Semtech Corporation
SC1543 's PackagesSC1543 's pdf datasheet

SC1543 Pinout, Pinouts
SC1543 pinout,Pin out
This is one package pinout of SC1543,If you need more pinouts please download SC1543's pdf datasheet.

SC1543 Application circuits
SC1543 circuits
This is one application circuit of SC1543,If you need more circuits,please download SC1543's pdf datasheet.

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