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XRP6272ITC5TR-F Datasheet(PDF) 9 Page - Exar Corporation |
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XRP6272ITC5TR-F Datasheet(HTML) 9 Page - Exar Corporation |
9 / 13 page X XR RP P6 62 27 72 2 2 2A A 5 5V V--A Ad djju us stta ab blle e L Lo ow w D Drro op po ou utt V Vo olltta ag ge e R Re eg gu ulla atto orr © 2011 Exar Corporation 9/13 Rev. 1.2.0 POWER DISSIPATION The power dissipation across the device can be calculated as: - The total junction temperature is calculated as: where, TJ is the junction temperature, TA is the ambient temperature and ΘJA is the thermal resistance between junction to ambient. There is a temperature rise associated with this power dissipated while operating in a given ambient temperature. If the calculated junction temperature exceeds maximum junction temperature specification, then the built-in thermal protection feature is triggered as described previously. To insure reliable performance, the maximum allowable power dissipation for a given ambient temperature must be considered and it can be calculated as follows: ⁄ where, TJ(MAX) is the maximum junction temperature, TA is the ambient temperature and ΘJA is the thermal resistance between junction to ambient. In order to insure the best thermal flow, proper mounting of the IC is required. LAYOUT CONSIDERATION 1. Connect the bottom-side pad to a large ground plane for good thermal conductivity and to reduce the thermal resistance of the device. 2. The input capacitor CIN and output capacitor COUT must be placed as close as possible to the pins VIN and VOUT respectively. 3. Use short wires to connect the power supply to pins VIN and GND on the board. |
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Similar Description - XRP6272ITC5TR-F |
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