SLVAFQ0 October 2025 TPS61299
TI boost devices with down-mode start-up multiplex the start-up strategy during output short conditions (TPS61299). Whenever output voltage drops below the input, the device enters down mode. ILIMIT limits the inductor current until Vout drops below 0.5V. After that, the soft start-up current limit applies and clamps the current peak to 350mA. Figure 3-3 show the output short behavior.
The device stays in down-mode start-up procedure until the short circuit releases and the device can start up.