JAJSEW0 March 2018 LMR23615-Q1
PRODUCTION DATA.
The switching frequency can be programmed by the impedance RT from the RT pin to ground. The frequency is inversely proportional to the RT resistance. The RT pin can be left floating and the LMR23615 will operate at 400 kHz default switching frequency. The RT pin is not designed to be shorted to ground. For a desired frequency, typical RT resistance can be found by Equation 1. Table 1 gives typical RT values for a given fSW.
fSW (kHz) | RT (kΩ) |
200 | 200 |
350 | 115 |
500 | 78.7 |
750 | 53.6 |
1000 | 39.2 |
1500 | 26.1 |
2000 | 19.6 |
2200 | 17.8 |