SLVSH05 November 2023 LP8865U-Q1 , LP8865V-Q1 , LP8865W-Q1 , LP8865X-Q1 , LP8865Y-Q1 , LP8865Z-Q1
PRODUCTION DATA
The switching frequency of LP8865 family is adjustable from 100 kHz to 2.2 MHz by means of changing RFSET connected between FSET pin and AGND. The default switching frequency is 100 kHz when the FSET pin is connected to nothing.
The resistor value and the corresponding switching frequency are listed in the below table:
Switching Frequency | Resistor Value (kΩ) |
100 kHz | 232 |
200 kHz | 138 |
300 kHz | 83 |
400 kHz | 59 |
600 kHz | 38 |
800 kHz | 28 |
1 MHz | 23 |
1.2 MHz | 18 |
1.5 MHz | 13 |
1.8 MHz | 11 |
2.2 MHz | 9 |
For example, if RFSET is set to 59 kΩ, the corresponding switching frequency is 400 kHz.
In most cases, lower switching frequency has higher system efficiency and better thermal performance.