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TPS54312 Datasheet(PDF) 11 Page - Texas Instruments |
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TPS54312 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 22 page TPS54311, TPS54312 TPS54313, TPS54314 TPS54315, TPS54316 SLVS416B − FEBRUARY 2002 − REVISED APRIL 2005 www.ti.com 11 PERFORMANCE GRAPHS 50 60 70 80 90 100 01 2 3 4 5 Load Current − A EFFICIENCY vs LOAD CURRENT 3.3 VI 5 VI Efficiency at 700 kHz Figure 13 Figure 14 1.7 1.75 1.8 1.85 1.9 01 23 4 5 IL − Load Current − A OUTPUT VOLTAGE vs LOAD CURRENT 3.3 VI 5 VI −30 −15 0 30 45 60 100 1 k 10 k 100 k 1 M −90 −45 0 45 90 180 f − Frequency − Hz LOOP RESPONSE Gain Phase 15 135 Figure 15 VO (AC) 10 mV/div VI = 5 V IO = 3 A 400 ns/div OUTPUT RIPPLE VOLTAGE Time − 100 µs/div Figure 16 Figure 17 Figure 18 VO 50 mV/div LOAD TRANSIENT RESPONSE IO 2 A/div Time − 10 µs/div VI 2 V/div VO 2 V/div VPWRGD 5 V/div START-UP WAVEFORMS Time − 2 ms/div VI = 5 V 75 55 35 01 2 85 95 AMBIENT TEMPERATURE vs LOAD CURRENT 125 34 115 45 25 65 105 IL − Load Current − A Safe Operating Area† † Safe operating area is applicable to the test board conditions listed in the Dissipation Rating Table section of this data sheet. Figure 19 |
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