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In this example, VIN has been defined as 3.3V, VOUT as 2.5V, and 10kΩ selected for R2. From the equation for calculating R1 and using the value of 0.5V for VREF from the datasheet, a value of 40kΩ is needed for R1. TAMBIENT is also defined to be 50 °C. From the datasheet, TJ-MAX is calculated as 125 °C, and RTHETA-JA defined as 36 °C/W. With those values, the maximum available output current will be 2.6A.
PTM Published on: 2011-09-27
