¡El APW8815 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. ¡El APW8815 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers. ¡El APW8815 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the APW8815 provides very high efficiency over light to heavy loads with loadingmodulated switching frequencies. In PWM Mode, the converter works nearly at constant frequency for low-noise requirements. ¡El APW8815 is equipped with accurate positive currentlimit, output under-voltage, and output over-voltage protections, perfect for NB applications. ¡El Power-OnReset function monitors the voltage on VCC and PVCC to prevent wrong operation during power-on. ¡El APW8815 has a 1.2ms digital soft-start and built-in an integrated output discharge device for soft-stop. An internal integrated soft-start ramps up the output voltage with programmable slew rate to reduce the start-up current. A soft-stop function actively discharges the output capacitors. ¡El APW8815 is available in 14pin TSSOP, 14pin QFN and 16pin TQFN packages respectively.