Texas Instruments TPS76933, Руководство пользователя

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Adjusting the TPS76x01/TPS77001 Output Voltage
3-4
Table 3–1. Exact Resistor Values(Continued)
Vout R1/R2 Maximum Value for R1+R2[k
Ω
]
3.4 1.886248 485.714
3.5 1.971138 500.000
3.6 2.056027 514.286
3.7 2.140917 528.571
3.8 2.225806 542.857
3.9 2.310696 557.143
4 2.395586 571.429
4.1 2.480475 585.714
4.2 2.565365 600.000
4.3 2.650255 614.286
4.4 2.735144 628.571
4.5 2.820034 642.857
4.6 2.904924 657.143
4.7 2.989813 671.429
4.8 3.074703 685.714
4.9 3.159593 700.000
5 3.244482 714.286
5.5 3.66893 785.714
6 4.093379 857.143
6.5 4.517827 928.571
7 4.942275 1000.000
7.5 5.366723 1071.429
8 5.791171 1142.857
8.5 6.21562 1214.286
9 6.640068 1285.714
9.5 7.064516 1357.143
10 7.488964 1428.571
10.5 7.913413 1500.000
11 8.337861 1571.429
11.5 8.762309 1642.857
12 9.186757 1714.286
To ensure proper regulation, the divider current should be 7
µ
A. The maximum
resistor value for R1+R2 can be seen in Figure 3–2 and Table 3–1.
To get the actual values for R1 and R2, get the resistor ratio and the maximum
resistor value for the desired output voltage out of Figure 3–2 or Table 3–1 and
do the following calculations: