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TL2217-285KC Datasheet(PDF) 4 Page - Texas Instruments |
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TL2217-285KC Datasheet(HTML) 4 Page - Texas Instruments |
4 / 6 page TL2217-285 FIXED-VOLTAGE REGULATORS FOR SCSI ACTIVE TERMINATION SLVS066F – NOVEMBER 1991 – REVISED JULY 1999 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 COMPENSATION-CAPACITOR SELECTION INFORMATION The TL2217-285 is a low-dropout regulator. This means that the capacitance loading is important to the performance of the regulator because it is a vital part of the control loop. The capacitor value and the equivalent series resistance (ESR) both affect the control loop and must be defined for the load range and the temperature range. Figure 3 and Figure 4 can be used to establish the capacitance value and ESR range for best regulator performance. Figure 1 2.4 2.2 2 1.8 0 0.1 0.2 0.3 2.6 2.8 3 0.4 0.5 Not Recommended Potential Instability 1.2 1 0.8 0.6 1.4 1.6 0.4 0.2 0 ESR (OUTPUT CAPACITOR) vs LOAD CURRENT IL – Load Current – A Applied Load Current Load Voltage ∆ IL ∆ VL Max ESR Boundary Min ESR Boundary CL = 22 µF CI = 0.1 µF TJ = 25°C Figure 2 0.02 0.015 0.005 0 0 0.5 1 1.5 2 2.5 3 0.025 0.035 3.5 4 4.5 5 0.01 0.03 0.04 STABILITY vs ESR Not Recommended Potential Instability Recommended Min ESR 22 µF 100 µF 200 µF 400 µF 1000 µF Region of Best Stability 1/ESR 10 µF |
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