Methods, systems, and devices for wireless communications are described that provide for a user equipment (UE) that operates in a low-power mode and monitors for a low power wake-up signal (LP-WUS) to indicate that the UE is to transition from the low-power mode to a higher power mode. The UE may receive an on-off keying (OOK) LP-WUS that has control information overlaid on one or more OOK ON symbols. The control information may be carried in a physical downlink control channel (PDCCH) that is provided as an orthogonal frequency division multiplexing (OFDM)-based control channel signal that is overlaid on an OOK LP-WUS. Within each OOK-ON symbol, an entire or partial PDCCH may transmitted, depending on the OOK symbol duration and number of information bits of the PDCCH.