SLUAB16 March 2025 LMR51403 , TPS629203
4.1 VIN and VOUT Ripple Results
Figure 4-1, Figure 4-2 and Figure 4-3 are the simulation results of the TPS629203 VIN ripple. Figure 4-1, Figure 4-2 and Figure 4-3 are the bench test results. The load current points are 4mA,10mA and 20mA, respectively.
Figure 4-1 VIN Ripple of Simulation Under IO= 4mA
Figure 4-3 VIN Ripple of Simulation Under IO= 20mA
Figure 4-5 VIN Ripple of Bench Test
Under IO= 10mA
Figure 4-2 VIN Ripple of Simulation Under IO= 10mA
Figure 4-4 VIN Ripple of Bench Test
Under IO= 4mA
Figure 4-6 VIN Ripple of Bench Test
Under IO= 20mAFigure 4-7, Figure 4-8 and Figure 4-9 are the simulation results of the TPS629203 VOUT ripple. Figure 4-10, Figure 4-11 and Figure 4-12 are bench test results. The load current points are 4mA,10mA and 20mA, respectively.
Figure 4-7 VOUT Ripple of Simulation
Under IO= 4mA
Figure 4-9 VOUT Ripple of Simulation
Under IO= 20mA
Figure 4-11 VOUT Ripple of Bench Test
Under IO= 10mA
Figure 4-8 VOUT Ripple of Simulation
Under IO= 10mA
Figure 4-10 VOUT Ripple of Bench Test
Under IO= 4mA
Figure 4-12 VOUT Ripple of Bench Test
Under IO= 20mATable 4-1 and Table 4-2 show the comparison between the calculated values and the simulation and bench test results. The error is small, which proves the correctness of the above design process and achieves the design goal.
| Load Current | Calculation Value (ΔVIN) |
Simulation Value (ΔVIN) |
Bench Test Value (ΔVIN) |
|---|---|---|---|
|
4mA |
14.6mV |
14.7mV |
15.4mV |
|
10mA |
14.2mV |
14.4mV |
14.4mV |
|
20mA |
13.4mV |
13.8mV |
13.4mV |
|
Load Current |
Calculation Value (ΔVOUT) |
Simulation Value (ΔVOUT) |
Bench Test Value (ΔVOUT) |
|---|---|---|---|
|
4mA |
6.7mV |
6.6mV |
6.6mV |
|
10mA |
6.1mV |
6.1mV |
6.0mV |
|
20mA |
5.5mV |
5.4mV |
5.4mV |