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TPS79018 Datasheet(PDF) 8 Page - Texas Instruments |
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TPS79018 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 20 page TPS79015, TPS79018, TPS79025, TPS79028, TPS79030 ULTRALOW-POWER LOW-NOISE 50-mA LOW-DROPOUT LINEAR REGULATORS SLVS299B – SEPTEMBER 2000 – REVISED MAY 2001 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS 100 1k 10k 100k f – Frequency – Hz VI = 4 V Co = 10 µF C(byp) = 0.1 µF TPS79030 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY IO = 50 mA 0 100 200 300 400 500 600 700 IO = 1 mA Figure 9 Figure 10 0 200 400 600 800 1000 1200 1400 1600 1800 100 1k 10k 100k C(byp) = 0.001 µF C(byp) = 0.01 µF C(byp) = 0.1 µF f – Frequency – Hz TPS79030 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY VI = 4 V IO = 50 mA Co = 10 µF 150 100 50 0 0.00001 0.0001 0.001 0.01 200 250 ROOT MEAN SQUARED OUTPUT NOISE vs BYPASS CAPACITANCE 300 0.1 1 C(bypass) – Bypass Capacitance – µF VO = 3 V VO = 1.5 V Figure 11 Co = 10 µF Figure 12 100 1M 10 1k f – Frequency – Hz 10k OUTPUT IMPEDANCE vs FREQUENCY 0 1.6 1 2 0.2 1.4 0.4 1.8 0.6 1.2 0.8 100k VI = 4 V Co = 10 µF TJ = 25°C IO = 50 mA IO = 1 mA |
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