APW7080 Datasheet | ANPEC

Features - - - - - - - - - - - - - - - Wide Input Voltage from 4.5V to 26V Output Current up to 4A Adjustable Output Voltage from 0.8V to 90%VIN - 0.8V Reference Voltage - ±2.5% System Accuracy 80mΩ Integrated P-Channel Power MOSFET High Efficiency up to 91% - Pulse-Skipping Mode (PSM) / PWM Mode Operation Current-Mode Operation - Stable with Ceramic Output Capacitors - Fast Transient Response Power-On-Reset Monitoring Fixed 380k Hz Switching Frequency in PWM Mode Built-in Digital Soft-Start Output Current-Limit Protection with Frequency Foldback 70% Undervoltage Protection Over-Temperature Protection <5µA Quiescent Current during Shutdown Thermal-Enhanced SOP-8P Package Lead Free and Green Devices Available (Ro HS pliant) General Description The APW7080 is a 4A, asynchronous, step-down converter with integrated 80mΩ P-channel MOSFET. The device, with current-mode control scheme, can convert 4.5~26V input voltage to the output voltage adjustable from 0.8 to 90% VIN to provide excellent output voltage regulation. The APW7080 regulates the output voltage in automatic PSM/PWM mode operation, depending on the output current, for high efficiency operation over light to full load current.The APW7080 is also equipped with power-onreset, soft-start, and whole protections (undervoltage, over temperature, and current-limit) into a single package. In shutdown mode, the supply current drops below 5µA. This device, available in an 8-pin SOP-8P package, provides a very pact system solution with minimal external ponents and good thermal conductance. 100 90 VOUT =5V VOUT =3.3V Efficiency (%) 80 70 60 50 40 30 20 10 Simplified Application Circuit C1 10µF VIN VCC C3 UGND LX U1 APW7080 +12 Output Current, IOUT (A) Applications - - - - - - - LCD Monitor / TV Set-Top Box Portable DVD Wireless LAN ADSL, Switch HUB Notebook puter Step-down Converters Requiring High Efficiency and 4A Output Current C2 L1 4A D1 R1 1% VOUT +3.3V C4...