High Efficiency Step Down Dc/dc Controller

The SS6578 is a high performance Step-down DC/DC controller, designed to drive an external P-Channel MOSFET to generate programmable output voltages. Two main schemes of Pulse-Skipping and Pulse-Frequency Modulation are employed to maintain low quiescent current and high conversion efficiency under wide ranges of input voltage and loading condition. The SS6578 delivers 10mA to 2A of output current with 87%~93% efficiency at VIN=9V, VOUT=5V condition. A current-sense Comparator with both inverting and non-inverting inputs uncommitted is included to provide the crucial function of either current-limit protection or constant-output current control. When the SS6578 is used in a high-side current-sensing Step-down constant-current source, the efficiency is typically greater than 90%. Duty-cycle CAN be adjusted to greater than 90% by connecting a resistor from DUTY pin to VIN. Quiescent current is about 90mA and CAN be reduced to 8mA in shutdown mode. The switching frequency range of around 90 kHz to 280 kHz allows small size switching components, which are ideal for battery powered portable equipment. By Unkown
SS6578 's PackagesSS6578 's pdf datasheet

SS6578 Pinout, Pinouts
SS6578 pinout,Pin out
This is one package pinout of SS6578,If you need more pinouts please download SS6578's pdf datasheet.

SS6578 Application circuits
SS6578 circuits
This is one application circuit of SS6578,If you need more circuits,please download SS6578's pdf datasheet.

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