AS5430

A1 A1semi Electronics Ltd AS54303A 400KHz Synchronous Rectified Step-Down Converter „ GENERAL DESCRIPTION The AS5430 is a monolithic synchronous buck regulator. The device integrates 100mΩ MOSFETS that provide 3A continuous load current over a wide operating input voltage of 4.75V to 23V. Current mode control provides fast transient response and cycle-by-cycle current limit. An adjustable soft-start prevents inrush current at turn-on. In shutdown mode, the supply current drops below 1uA. The device provides a very compact system solution with minimal reliance on external components. „ FEATURES ‹ 3A Output Current ‹ Integrated 100mΩ Power MOSFETS ‹ Wide 4.75~23V Input Voltage Range ‹ Programmable Soft-start ‹ Up to 95% Efficiency ‹ Stable with Low ESR Ceramic Output Capacitors ‹ Output Adjustable From 0.925V to 20V ‹ Cycle-by-Cycle Over Current Protection ‹ Input Under Voltage Lockout ‹ Fixed 400KHz Frequency „ APPLICATION ‹ Distribute Power Supply ‹ Networking Systems ‹ Notebook or Mini-book ‹ LCD TV/LCD Monitor „ ORDER INFORMATION Order Number AS5430D/TR-LF Package SOP8(Exposed Pad) „ BLOCK DIAGRAM Packing Tape&Reel, MPQ=2500 Remark Lead-Free AS5430Ver1.0 1 http://www.a1semi.com A1 A1semi Electronics Ltd „ PIN CONFIGURATION 3A 400KHz Synchronous Rectified AS5430Step-Down Converter „ PIN DESCRIPTION Pin# 1 2 3 4 5 6 7 8 Name BS IN SW GND FB COMP EN SS Description High-side Gate Drive Boost Input.BS suppliers the drive for the high-side N-Channel MOSFET swi...