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LT1950 Datasheet(PDF) 4 Page - Linear Technology |
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LT1950 Datasheet(HTML) 4 Page - Linear Technology |
4 / 20 page LT1950 4 sn1950 1950fs TEMPERATURE ( °C) –50 1.26 1.25 1.24 1.23 1.22 1.21 1.20 25 75 1950 G01 –25 0 50 100 125 TEMPERATURE ( °C) –50 1950 • G02 0 50 100 240 230 220 210 200 190 180 170 160 –25 25 75 125 TEMPERATURE ( °C) –50 1950 • G03 0 50 100 16 14 12 10 8 6 4 2 0 –25 25 75 125 SHDN = 0V TEMPERATURE ( °C) –50 1950 • G04 0 50 100 1.45 1.40 1.35 1.30 1.25 1.20 –25 25 75 125 TEMPERATURE ( °C) –50 125 120 115 110 105 100 95 90 85 80 75 0 50 75 1950 G05 –25 25 100 125 270 250 230 210 190 170 150 130 110 90 TEMPERATURE ( °C) –50 0 50 75 1950 G06 –25 25 100 125 PARAMETER CONDITIONS MIN TYP MAX UNITS Maximum Duty Cycle Clamp VSEC = 1.4V, FB = 1V, COMP = VOH 63 75 87 % VSEC Input Bias Current 0V < VSEC < 2.8V –0.3 –1.0 µA Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1950EGN is guaranteed to meet performance specifications from 0 °C to 125°C operating junction temperature. Specifications over the –40 °C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LT1950IGN is guaranteed over the full –40 °C to 125°C operating junction temperature range. Note 3: Rise and Fall times are between 10% and 90% levels. FB Voltage vs Temperature Switching Frequency vs Temperature VIN Shutdown IQ vs Temperature Shutdown Threshold vs Temperature Maximum ISENSE Threshold vs Temperature ISENSE Pin Current vs Temperature ELECTRICAL CHARACTERISTICS TYPICAL PERFOR A CE CHARACTERISTICS Note 4: Guaranteed by correlation to static test. Note 5: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125 °C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 6: Guaranteed but not tested. Note 7: Maximum recommended SYNC frequency = 500kHz. The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. COMP = open, FB = 1.4V, ROSC = 249k, SYNC = 0V, SLOPE = open, VREF = 0.1 µF, SHDN = VIN, BLANK = 0V, ISENSE = 0V, VIN2 = 15V, GATE = 1nF, BOOST = open, VIN = 15V, VSEC = 0V, unless otherwise specified. |
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