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TPS54519RTE Datasheet(PDF) 9 Page - Texas Instruments |
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TPS54519RTE Datasheet(HTML) 9 Page - Texas Instruments |
9 / 17 page EN = 2 V / div Time = 2 msec / div V = 1 V / div OUT PWRGD = 5 V / div V = 5 V / div IN EN = 2 V / div Time = 2 msec / div V = 1 V / div OUT PWRGD = 5 V / div V = 5 V / div IN www.ti.com Test Setup and Results 2.9 Powering Up Figure 9 and Figure 10 show the start-up waveforms for the TPS54519EVM-037. In Figure 9, the output voltage ramps up as soon as the input voltage reaches the UVLO threshold as set by the R 1 and R2 resistor divider network. In Figure 10, the input voltage is initially applied and the output is inhibited by using a jumper at JP1 to tie EN to GND. When the jumper is removed, EN is released. When the EN voltage reaches the enable-threshold voltage, the start-up sequence begins and the output voltage ramps up to the externally set value of 1.8 V. The input voltage for these plots is 5 V and the load is 1 Ω. Figure 9. TPS54519EVM-037 Start-Up Relative to V IN Figure 10. TPS54519EVM-037 Start-Up Relative to Enable 9 SLVU523 – September 2011 TPS54519EVM-037, 5-A, SWIFT ™ Regulator— Evaluation Module Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated |
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