APW8722C

APW8722/A/B/C/D 5V to 12V Single Buck Voltage Mode PWM Controller Features Wide 5V to 12V Supply Voltage Power-On-Reset Monitoring on VCC Excellent Output Voltage Regulations - 0.6V Internal Reference for APW8722/A/D - 0.8V Internal Reference for APW8722B/C - ±0.6% Over-Temperature Range General Description The APW8722 is a voltage mode, fixed 200kHz/300kHz/ 600kHz switching frequency, synchronous buck converter. The APW8722 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 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 APW8722 provides excellent output voltage regulations against load current variation. The controller’ s over-current protection monitors the output current by using the voltage drop across the RDS (ON) of low-side MOSFET, eliminating the need for a current sensing resistor that features high efficiency and low cost. In addition, the APW8722 also integrates excellent protection functions. The over-voltage protection (OVP) , under-voltage protection (UVP). OVP circuit which monitors the FB voltage to prevent the PWM output from over voltage, and UVP circuit which monitors the FB voltage to p...