LT1270

LT1270A/LT1270 8A and 10A High Efficiency Switching Regulators U U FEATURES s Wide Input Voltage Range: 3.5V to 30V s Low Quiescent Current: 7mA s Internal 8A Switch (10A for LT1270A) s Very Few External Parts Required s Self-Protected Against Overloads s Shutdown Mode Draws Only 100µA Supply Current s Flyback-Regulated Mode Has Fully Floating Outputs s Can be Externally Synchronized (See LT1072 Data Sheet) s Comes in Standard 5-Pin TO-220 Package U APPLICATIO S s High Efficiency Buck Converter s PC Power Supply with Multiple Outputs s Battery Upconverter s Negative-to-Positive Converter USER NOTE: This data sheet is only intended to provide specifications, graphs and a general functional description of the LT1270A/LT1270. Application circuits are included to show the capability of the LT1270A/LT1270. A complete design manual (AN-19) should be obtained to assist in developing new designs. AN-19 contains a comprehensive discussion of both the LT1070 and the external components used with it, as well as complete formulas for calculating the values of these components. AN-19 can also be used for the LT1270A/LT1270 by factoring in the higher switch current rating and higher operating frequency. A comprehensive CAD program called SwitcherCad is also available. Contact the local sales office in your area or the factory direct. DESCRIPTIO The LT1270A/LT1270 are monolithic high power switching regulators. Identical to the popular LT1070, except for switching frequency (60kHz) and h...