AME AME5284
The AME5284 is a Synchronous Rectified Step-Down Converter with internal power MOSFETs. It achieves 4A continous output current over a wide switching frequency range with excellent load and line regulation. The circuit protection includes cycle-by cycle current limiting, output short circuit frequency protection and thermal shutdown.GENERAL DESCRIPTION
Current mode operation provides fast transient response and eases of loop stabilization. Internal soft-start minimizes the inrush supply current at startup. This device is available in SOP-8/PP package with exposed pad for low thermal resistance. nFEATURES
l 4A Output Current l 70mΩ/70mΩ Internal Power MOSFET Switch l Stable with Low ESR Output Ceramic Capacit -ors l Up to 95% Efficiency l Less than 10µA Shutdown Current l Wide Switching Frequency Range from 300KHz~1.4MHz l Thermal Shutdown l Cycle by cycle Over Current Protection and Hiccup l Output Adjustable from 0.8V to VIN l Short Circuit Frequency Protection l Green Products Meet RoHS Standards nAPPLICATIONS
l TV l Distributed Power Systems l Pre-Regulator for Linear Regulators n Typical Application IN 5V CIN 10µF C2 Optional IN SW OFF ON EN AME5284 C1 680pF R3 5.1K COMP FB GND FREQ RFREQ 30K L1 1.5µH R1 12K R2 24K OUT 1.2V 4A COUT 22µF Rev. A.02 1 AME AME5284 n Functional Block Diagram 4A, 300KHz ~ 1.4MHz S...