LP5861 requires an external capacitor C_VCAP, whose value is 1 μF connected from V_CAP to GND for proper operation of internal LDO. The external capacitor must be placed as close to the device as possible.

TI recommends 1-μF capacitors to be placed between VCC / VLED with GND, and 1-nF capacitor placed between VIO with GND. Place the capacitors as close to the device as possible.

Pullup resistors R_pull-up are requirement for SCL and SDA when using I²C as communication method. In typical applications, TI recommends 1.8-kΩ to 4.7-kΩ resistors.

To decrease thermal dissipation from device to ambient, resistors R_CS an optionally be placed in serial with the LED. Voltage drop on these resistors must leave enough margins for VSAT to ensure the device work normally.