APW7063

APW7063 Synchronous Buck PWM and Linear Controller Features Provide Two Regulated Voltages - Synchronous Rectified Buck PWM Controller - Linear Controller Fast Transient Response - 0~85% Duty Ratio Excellent Output Voltage Regulation - 0.8V Internal Reference - ±1% Over Line Voltage and Temperature Over Current Protection - Sense Low-Side MOSFET’s RDS(ON) Under Voltage Lockout Small Converter Size - 250kHz Free-Running Oscillator - Programmable From 70kHz to 800kHz 14-Lead SOIC Package Lead Free and Green Devices Available (RoHS Compliant) Applications Graphic Cards Memory Power Supplies DSL or Cable MODEMs Set Top Boxes Low-Voltage Distributed Power Supplies General Description The APW7063 integrates PWM and linear controller, as well as the monitoring and protection functions into a single package. The synchronous PWM controller which drives dual N-channel MOSFETs, which provides one controlled power outputs with under-voltage and overcurrent protections. Linear controller drives an external N-channel MOSFET with under-voltage protection. APW7063 provides excellent regulation for output load variation. An internal 0.8V temperature-compensated reference voltage is designed to meet the various low output voltage applications. APW7063 includes a 250kHz free-running triangle-wave oscillator that is adjustable from 70kHz to 800kHz. A power-on-reset (POR) circuit limits the VCC minimum opearting supply voltage to assure the controller working well. Ov...