Texas Instruments Evaluation Module for TPS54319 Step-Down SWIFT DC/DC Converter TPS54319EVM-626 TPS54319EVM-626 데이터 시트
제품 코드
TPS54319EVM-626
Vin = 100 mV / div (ac coupled)
PH = 2 V / div
Time = 500 nsec / div
Vin = 5 V / div
Vout = 2 V / div
EN = 2 V / div
PWRGD = 5 V / div
Time = 5 msec / div
Test Setup and Results
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2.8
Input Voltage Ripple
The TPS54319EVM-626 input voltage ripple is shown in
. The output current is the rated full load
of 3 A and V
IN
= 5 V. The ripple voltage is measured directly across the input capacitors.
Figure 8. TPS54319EVM-626 Input Ripple
2.9
Powering Up
2.9.1
Power Up Relative to V
IN
The start-up waveform shown in
shows start-up is relative to VIN rising. The input voltage is
initially applied, and when the input reaches the undervoltage lockout threshold, the start-up sequence
begins and the output ramps up at the externally set rate toward the set value of 1.8 V. The input voltage
for this plot is 5 V with a 2
begins and the output ramps up at the externally set rate toward the set value of 1.8 V. The input voltage
for this plot is 5 V with a 2
Ω
load.
Figure 9. TPS54319EVM-626 Start-Up Relative to V
IN
8
TPS54319EVM-626 3-A, SWIFT™ Regulator Evaluation Module
SLVU377 – May 2010
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