APW8879 Datasheet | ANPEC

Features General Description - Wide Operating Range from +5.5V to +24V Input Voltages - Power-On-Reset Monitoring on VIN at 4.5V ~ 4.9V range - Built-in 100u A low quiescent current - Support IOUT = 8A Application - Built in PWM & PFM Control Schemes with COT architecture - Built in Integrated Bootstrap Forward P-CH MOSFET - Fixed Switching Frequency from 700KHz - Fixed 3.33V VOUT REF voltage with + 0.6% accuracy - Support Ultrasonic Mode selection on EN Pin - Support built-in fixed Soft Start time 2.4m S - Integrated 25mΩ N-Channel MOSFET For High Side MOS - Integrated 12mΩ N-Channel MOSFET For Low Side MOS - Built in Open-Drain Type POK function and EN control - 250 k Hz CLK for External Charge Pump - Built in 3.3V/100m A LDO and Switch-over MOSFET with PWM output - UVP setting at 70%of VREF & OVP setting at 125% of VREF & Thermal Shutdown - Built in Over Current Protection and Current Limit Protection using high-side MOSFET RDS(on) and low-side MOSFET RDS(on) sensing - Flip-Chip TQFN 2x3-12P with Lead Free & Ro HS pliant The APW8879 is a 8A, synchronous buck converter with integrated 25mΩ High-Side MOSFET and 12mΩ Low Side MOSFET. The APW8879 designed with a constant on-time control architecture can step down high voltage to acmodate low-voltage chipset for IMPV8 applications. The APW8879 is equipped with an automatic PFM/PWM mode operation. At light load, the converter operates in the PFM mode to reduce the switching losses and provide high efficiency. At heavy load, the converter works in PWM mode and operates nearly at constant frequency for lownoise requirements. The APW8879 is also equipped with Power-on-reset, softstart, soft-stop, and whole protections (under-voltage, over-voltage, over-temperature, over-current and current-limit) into a single package. The charge pump circuit with 250k Hz clock driver uses VOUT as its power supply to generate approximately 10~12V DC voltage. This device, available in TQFN 2x3-12 package, provides a very pact system solution...