The APW7165Cis a voltage mode, fixed 300kHz-switching frequency, and synchronous buck controller. The APW7165C allows wide input voltage that is either a single 5~12V or two supply voltage(s) for various applications. A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls. A builtin digital soft-start circuit prevents the output voltages from overshoot as well as limits the input current. An internal 0.6V temperature-compensated reference voltage with high accuracy is designed to meet the requirement of low output voltage applications. The APW7165C provides excellent output voltage regulations against load current variation. The controller’s over-current protection monitors the output current by using the voltage drops across the RDS(ON) of low-side MOSFET, eliminating the need for a current sensing resistor that features high efficiency and low cost. The APW7165C also integrates over-voltage protection (OVP) and under-voltage protection circuit which monitors the FB voltage to prevent the PWM output from over and under voltage. The APW7165C is available in a simple SOP-8P package.