Linear ADI Power LT8618 Demo Manual page 4

DEMO MANUAL SCP-LT8618-IEVALZ
FREQUENCY PIN CONFIGURATION
The LT8618 allows the user to program an operating fre-
quency by a single resistor. The default operating fre-
quency is 2.0MHz. Note that changing the switching fre-
quency may affect other parameters and likely necessi-
tates a change in inductor and compensation component
values. Contact the SCP team for applications support if
shifting the switching frequency greater than ±10%.
Table 3. Resistor Selection Guide for Switching Frequency Setting
f
SW
200kHz
300kHz
400kHz
500kHz
600kHz
700kHz
800kHz
900kHz
1.00MHz
1.10MHz
1.20MHz
4
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R2 (Ω) f
SW
221k 1.30MHz
143k 1.40MHz
110k 1.50MHz
86.6k 1.60MHz
71.5k 1.70MHz
60.4k 1.80MHz
52.3k 1.90MHz
46.4k 2.00MHz
40.2k 2.10MHz
36.5k 2.20MHz
33.2k
R2 (Ω)
30.1k
27.4k
25.5k
23.7k
22.1k
20.5k
19.1k
18.2k
16.9k
16.2k
Rev. 0