DEMO MANUAL SCP-LT8618-BEVALZ
Rev. 0
4
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 4.
Resistor Selection Guide for Switching Frequency Setting
f
SW
R
2
(
Ω
)
f
SW
R
2
(
Ω
)
200kHz
221k
1.30MHz
30.1k
300kHz
143k
1.40MHz
27.4k
400kHz
110k
1.50MHz
25.5k
500kHz
86.6k
1.60MHz
23.7k
600kHz
71.5k
1.70MHz
22.1k
700kHz
60.4k
1.80MHz
20.5k
800kHz
52.3k
1.90MHz
19.1k
900kHz
46.4k
2.00MHz
18.2k
1.00MHz
40.2k
2.10MHz
16.9k
1.10MHz
36.5k
2.20MHz
16.2k
1.20MHz
33.2k
