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STD Datasheet(Fiches technique) 5 Page - Texas Instruments

Numéro de pièce STD
Description  TPS54120EVM, Low Noise 1A Power Supply Evaluation Module
Télécharger  15 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

STD Datasheet(HTML) 5 Page - Texas Instruments

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f - Frequency - Hz
V
= 12 V, V
= 3.3 V,
C
= 100 F, C
= 0.1 F,
I
= 400 mA, F
= 480 kHz,
L1 = 22 H
IN
OUT
OUT
NR
OUT
SW
m
m
m
www.ti.com
Test Results
4.1
Output Voltage Ripple
Figure 1 shows the output voltage ripple of the LDO and SWITCHER converter for the TPS54120EVM
with Vin = 12V, SW OUT = 4.1V, LDO OUT = 3.3V, Iout = 400mA, Fswitching = 480kHz.
Figure 1. Output Voltage of Both the SW and LDO with 400mA Load
4.2
Output Noise
Figure 2 shows the output voltage noise spectrum for the TPS54120EVM with Vin = 12V, LDO OUT =
3.3V, SW OUT = 4.1V, Iout = 400mA, Fswitching = 480kHz.
Figure 2. Output Spectrum Noise Density vs. Frequency
5
SLVU641
– January 2012
TPS54120EVM, Low Noise 1A Power Supply Evaluation Module
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Copyright
© 2012, Texas Instruments Incorporated


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