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142-0711-201 Datasheet(PDF) 7 Page - Texas Instruments |
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142-0711-201 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 15 page 20 ms/div www.ti.com Test Results Figure 5 shows the LDO output voltage turn-on of TPS54120 from SW enable for the TPS54120EVM with Vin = 12V, SW OUT = 4.1V, LDO OUT = 3.3V, and Iout = 400mA, Fswitching = 480kHz. Figure 5. LDO Output Voltage Turn-on, SW Enable 4.4 Load Transient Figure 6 shows the TPS54120 response to load transients. The current step is from 30% to 75% of the maximum rated load at 12 V input. Total peak-to-peak voltage variation is as shown, including ripple and noise on the output of both the switcher and the LDO. Figure 6. TPS54120 Transient Response 7 SLVU641 – January 2012 TPS54120EVM, Low Noise 1A Power Supply Evaluation Module Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated |
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