APW7083 Datasheet | ANPEC

Features - - - - - - - - - - - - - - - - - - Wide Input Voltage from 4.5V to 26V Output Current Up to 5A Adjustable Output Voltage from 0.8V to 90%VIN - 0.8V Reference Voltage - ±2.5% System Accuracy Integrated 50mΩ P-Channel Power MOSFET and 20mΩ N-Channel Power MOSFET High Efficiency up to 95% Current-Mode Operation - Stable with Ceramic Output Capacitors - Fast Transient Response Power-On-Reset Monitoring Fixed 380k Hz Switching Frequency in PWM Mode Automatic Pulse-Skipping Mode (PSM)/PWM Mode Operation Built-in Digital Soft-Start Output Current-Limit Protection with Frequency Foldback 70% Under-Voltage Protection Over-Temperature Protection 118% Over-Voltage Protection <5µA Quiescent Current During Shutdown Thermal-Enhanced TQFN5x6-28 Package Pb-Free Available as an Option Lead Free and Green Devices Available (Ro HS pliant) General Description The APW7083 is a 5A, synchronous, step-down converter with integrated 50m Ω P-channel power MOSFET and 20mΩ N-channel power 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 APW7083 regulates the output voltage in an automatic PSM/PWM mode operation, depending on the output current, for high efficiency operation over light to full load current. The APW7083 is also equipped with poweron-reset, soft-start, and whole protections (including overvoltage, under-voltage, over-temperature, and currentlimit) in a single package. In shutdown mode, the supply current drops below 5µA. This device, available in 28-pin TQFN5x6 package, provides a very pact system solution with minimal external ponents and good thermal conductance. Simplified Application Circuit C1 10µF VIN C3 1µF R5 100kΩ VCC UGND LX C2 1 µF VIN 4.5V~26V L1 5A VOUT 0.8V~90%VIN, 5A C4 22µF U1 ZCS APW7083 EN P PGND FB R2 1% R1 1% Applications - - - - - - - LCD Monitor / TV Set Top Box Portable DVD Wireless LAN ADSL, Switch...