[Silicon Touch Technology Inc.]

General Description
PS222S is specially designed for switching power supply system.   Four important functions of PS222S are the following: over-voltage protection,over-current protection, under-voltage protection and power good signal generating. OVP/UVP (Over-Voltage/Under-Voltage Protection) monitors 3.3V, 5V and 12V to protect our power supply. FPO/ goes tohigh when one of these  supply voltages exceeds their normal operation voltage range.

FEATUREs
• Over/Under-voltage protection and lock out 
• Over-current protection and lock out
• Fault protection output with open drain output stage
• Open drain power good output signal for power good input 
• Built-in 300mS power good delay
• AC on 75mS delay for UV/OC protection
• 38mS PSON/ control de-bounce
• 73uS de-bounce for noise immunity
• Wide power supply range (4.2V~16V)
• Special care for AC power off