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TPS78925DBVT Datasheet(PDF) 8 Page - Texas Instruments |
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TPS78925DBVT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 16 page TPS78915, TPS78918, TPS78925, TPS78928, TPS78930 ULTRALOW-POWER LOW-NOISE 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS300A – SEPTEMBER 2000 – REVISED MAY 2001 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Figure 9 f – Frequency – Hz 1k 10k 100k IO = 1 mA VI = 4.3 V 0 800 500 100 700 200 300 600 400 100 IO = 100 mA TPS78930 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY VI = 4 V Co = 10 µF C(byp) = 0.1 µF Figure 10 f – Frequency – Hz 1k 10k 100k 0 1.6 1 2 0.2 1.4 0.4 1.8 0.6 1.2 0.8 100 C(byp) = 0.01 µF TPS78930 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY VI = 4 V IO = 100 mA Co= 10 µF C(byp) = 0.1 µF C(byp) = 0.001 µF Figure 11 150 100 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 VI = 4 V Co = 4.7 µF Figure 12 100 1 M 10 1 k f – Frequency – Hz 10 k OUTPUT IMPEDANCE vs FREQUENCY 0 1.6 1 2 0.2 1.4 0.4 1.8 0.6 1.2 0.8 100 k IO = 100 mA IO = 1 mA |
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