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LTM8027EVPBF Datasheet(PDF) 16 Page - Linear Technology |
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LTM8027EVPBF Datasheet(HTML) 16 Page - Linear Technology |
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16 / 20 page  LTM8027 16 8027f The junction-to-air and junction-to-board thermal resis- tances given in the Pin Configuration diagram may also be used to estimate the LTM8027 internal temperature. These thermal coefficients are determined per JESD 51-9 (JEDEC standard, test boards for area array surface mount package thermal measurements) through analysis and physical correlation. Bear in mind that the actual thermal resistance of the LTM8027 to the printed circuit board depends upon the design of the circuit board. APPLICATIONS INFORMATION The die temperature of the LTM8027 must be lower than the maximum rating of 125°C, so care should be taken in the layout of the circuit to ensure good heat sinking of the LTM8027. The bulk of the heat flow out of the LTM8027 is through the bottom of the module and the LGA pads into the printed circuit board. Consequently a poor printed circuit board design can cause excessive heating, result- ing in impaired performance or reliability. Please refer to the PCB Layout section for printed circuit board design suggestions. Table 2. Recommended Component Values and Configuration (TA = 25°C. See Typical Performance Characteristics for load Conditions) VIN RANGE (V) VOUT (V) CIN COUT BIAS1/BIAS2 RADJ (kΩ) fOPTIMAL (kHz) ROPTIMAL (kΩ) fMAX (kHz) RMAX (kΩ) 4.5 to 60 3.3 2 × 4.7μF 2220 100V 5 × 100μF 1812 6.3V 8.5V to 15V 301 115 154 160 107 7.5 to 60 5 2 × 4.7μF 2220 100V 4 × 100μF 1210 6.3V 8.5V to 15V 162 210 75.0 230 68.2 10.5 to 60 8 2 × 4.7μF 2220 100V 4 × 47μF 1210 10V 8.5V to 15V 90.9 260 59.0 350 40.2 16 to 60 12 2 × 4.7μF 2220 100V 4 × 22μF 1210 16V AUX 56.2 300 48.7 500 23.7 20.5 to 60 15 2 × 4.7μF 2220 100V 4 × 22μF 1210 16V AUX 44.2 350 40.2 500 23.7 26 to 60 18 2 × 4.7μF 2220 100V 4 × 10μF 1812 25V 8.5V to 15V 36.5 400 31.6 500 23.7 34 to 60 24 2 × 4.7μF 2220 100V 4 × 10μF 1812 25V 8.5V to 15V 26.7 430 28.7 500 23.7 4.5 to 40 2.5 2 × 10μF 2220 50V 5 × 100μF 1812 6.3V 8.5V to 15V 487 145 124 185 88.7 4.5 to 40 3.3 2 × 10μF 2220 50V 4 × 100μF 1812 6.3V 8.5V to 15V 301 165 102 240 64.9 7.5 to 40 5 2 × 10μF 2220 50V 4 × 100μF 1210 6.3V 8.5V to 15V 162 210 75.0 315 45.3 10.5 to 40 8 2 × 10μF 2220 50V 4 × 47μF 1210 10V 8.5V to 15V 90.9 260 59.0 500 23.7 16 to 40 12 2 × 10μF 2220 50V 4 × 22μF 1210 16V AUX 56.2 300 48.7 500 23.7 20.5 to 40 15 1 × 10μF 2220 50V 4 × 22μF 1210 16V AUX 44.2 350 40.2 500 23.7 26 to 40 18 1 × 10μF 2220 50V 4 × 10μF 1812 25V 8.5V to 15V 36.5 400 31.6 500 23.7 34 to 40 24 1 × 10μF 2220 50V 4 × 10μF 1812 25V 8.5V to 15V 26.7 430 28.7 500 23.7 4.5 to 56 –3.3 2 × 4.7μF 2220 100V 5 × 100μF 1812 6.3V 8.5V to 15V Above Output 301 115 154 155 115 4.5 to 55 –5 2 × 4.7μF 2220 100V 4 × 100μF 1210 6.3V 8.5V to 15V Above Output 162 190 90.9 230 68.2 10.5 to 52 –8 2 × 4.7μF 2220 100V 4 × 47μF 1210 10V 8.5V to 15V Above Output 90.9 260 59.0 350 40.2 16 to 48 –12 2 × 4.7μF 2220 100V 4 × 22μF 1210 16V AUX 56.2 300 48.7 500 23.7 |
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