APW8814

APW8814 High-Performance Notebook PWM Controller Features Adjustable Output Voltage from +0.75V to +5.5V - 0.75V Reference Voltage - ±1% Accuracy Over-Temperature General Description The APW8814 is a single-phase, constant-on-time, synchronous PWM controller, which drives N-channel MOSFETs. The APW8814 steps down high voltage to generate low-voltage chipset or RAM supplies in notebook computers. The APW8814 provides excellent transient response and accurate DC voltage output in either PFM or PWM Mode. In Pulse Frequency Mode (PFM), the APW8814 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. The APW8814 is equipped with accurate positive currentlimit, output under-voltage, and output over-voltage protections, perfect for NB applications. The Power-OnReset function monitors the voltage on VCC and PVCC to prevent wrong operation during power-on. The APW8814 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. The APW8814 is available in 16pin TQFN package respectively. Operates from An Input Battery Voltage Range of +1.8V to +28V Power-On-Reset Monitoring on VCC Pin and PVCC ...