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LT1019CN8-2.5 Datasheet(PDF) 6 Page - Linear Technology |
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LT1019CN8-2.5 Datasheet(HTML) 6 Page - Linear Technology |
6 / 12 page 6 LT1019 1019fd CC HARA TERISTICS A TYPICALPERFOR CE JUNCTION TEMPERATURE (°C) –50 0.40 0.45 0.55 0.60 0.65 0.90 0.75 0 50 75 LT1019 • TPC10 0.50 0.80 0.85 0.70 –25 25 100 125 Temp Pin Voltage INPUT VOLTAGE (V) 0 –30 –20 0 20 40 140 80 10 20 25 LT1019 • TPC11 –10 100 120 60 515 30 35 40 LT1019-2.5 LT1019-5 IOUT TJ = 25°C LT1019-10 Line Regulation LT1019-2.5* Stability with Output Capacitance *LT1019-4.5/LT1019-5/LT1019-10 ARE STABLE WITH ALL LOAD CAPACITANCE. OUTPUT CURRENT (mA) 0.01 0.1 20 0 10 1019 G12 0.001 10 20 0.0001 1 10 15 5 5 15 SINK CURRENT SOURCE CURRENT REGION OF POSSIBLE INSTABILITY VIN 1.188V VOUT GND R2 LT1019-4.5, LT1019-5, LT1019-10 = 5k LT1019-2.5 = 10k R3 80k TRIM LT1019-2.5 = 11k LT1019-4.5 = 13.9k LT1019-5 = 16k LT1019-10 = 37.1k R1 LT1019 • BD BLOCK DIAGRA APPLICATIO S I FOR ATIO Line and Load Regulation Line regulation on the LT1019 is nearly perfect. A 10V change in input voltage causes a typical output shift of less than 5ppm. Load regulation (sourcing current) is nearly as good. A 5mA change in load current shifts output voltage by only 100µV. These are electrical effects, measured with low duty cycle pulses to eliminate heating effects. In real world applications, the thermal effects of load and line changes must be considered. Two separate thermal effects are evident in monolithic circuits. One is a gradient effect, where power dissipation on the die creates temperature gradients. These gradients can cause output voltage shifts even if the overall tempera- ture coefficient of the reference is zero. The LT1019, unlike previous references, specifies thermal regulation caused by die temperature gradients.The specification is 0.5ppm/mW. To calculate the effect on output voltage, simply multiply the change in device power dissipation by |
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