• Supply voltage operating range: 3.6 to 20V 

• Fixed oscillator frequency: Typ. 360KHz 

• Precision reference voltage: 0.5V (2%) 

• Low current consumption: 3mA 

• Programmable Soft-Start function (SS) 

• Short Circuit Shutdown and Auto Re-start function(ARSCP) 

• Built-in P-MOSFET for 3A loading capability 

• Package: SOP8 

The AS1003 is a buck topology of switching regulator for wide operating voltage applications field. The AS1003 includes a high current P-MOSFET, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control and oscillator for controlling the maximum duty cycle and PWM frequency, and has power-on programmable soft start time and short circuit PMOS turn-off and auto re-start protection functions.