AME5296

AME AME5296 2A, 18V, 500KHz Synchronous Step Down DC/DC Converter n General Description The AME5296 is a high frequency synchronous stepdown DC-DC cnverter with built internal power MOSFETs. That provides wide 4.5V to 18V input voltage range and 2A continuous load current capability. The AME5296 has synchronous mode operation for higher efficiency over output current load range. The AME5296 is current mode control scheme which provides fast transient response. Internal compensation function. n Features l Wide 4.5V to 18V Operating Input Range l 100mΩ/40mΩ Low RDS(ON) internal Power MOSFETs l Proprietary Switching Loss Reduction Techn -ique l High Efficiency Synchronous Mode Operation l Fixed 500KHz Switching Frequency l External Programmable Soft Start l OCP and Hiccup l Thermal Shutdown l Output Adjustable from 0.8V l RoHS Compliant and Halogen Free n Typical Application VIN 4.5-18V C1 22uF 25V C3 1uF C4 22nF EN IN BST VCC SW AME5296 SS EN FB GND R4 1C04Ω0.1uF L1 4.7uH R1 40.2K R3 33K R2 12.7K 3.3V 2A VOUT C2 47uF n Application l Notebook Systems and I/O Power l Digital Set Top Boxes l LCD Display, TV l Networking, XDSL Modem Rev. A.05 1 AME AME5296 n Functional Block Diagram 2A, 18V, 500KHz Synchronous Step-Down DC/DC Converter IN VCC SS EN FB VCC Regulator M Oscillator Reference 1MEG 1pF 50pF 400k Error Amplifer Current Sense Amplifer RSEN VCC HS Driver Current Limit Comparator Comparator On Time Control Logic Control VCC LS Driver BST SW GND 2...