The present invention provides a laser diode chip, a laser diode packaging module, a transmission apparatus, a ranging apparatus, and an electronic device. The laser diode chip comprises: a substrate, having a first surface and a second surface; a laser diode array, comprising at least two laser diodes formed on the substrate, the P electrode of each of the laser diodes being formed on the first surface of the substrate, the N electrode of each of the laser diodes being formed on the second surface of the substrate, and the light-emitting regions of each of the laser diodes being respectively formed between the P electrode and the N electrode of said laser diode; the laser diodes using an N electrode driving mode, and the N electrodes of adjacent laser diodes being isolated from each other. The arrangement of the present invention uses a micro/nano-machining process to ensure the accuracy of the relative position between multiple linear light sources, and also implement independent rapid driving of each light source.
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