The LK112S is a low dropout linear regulator with a built-in electronic switch. The internal switch can be controlled by TTL or CMOS logic levels. The device is ON state when the control pin is pulled to a logic high level. An external capacitor can be used connected to the noise bypass pin to lower the output noise level to 30µVrms. An internal PNP pass transistor is used to achieve a low dropout voltage. The LK112S has a very low quiescent current in ON MODE while in OFF MODE the Iq is reduced down to 100nA max. The internal thermal shutdown circuitry limits the junction temperature to below 150°C. The load current is internally monitored and the device will shutdown in the presence of a short circuit or overcurrent condition at the output.
The LK112S is a low‑dropout linear regulator with an integrated electronic switch that can be controlled by TTL or CMOS logic levels. It offers up to 200 mA output current, a typical dropout voltage of 0.5 V at full load, and very low quiescent current (250 pA in ON mode, 0.1 pA in OFF mode). The device includes a shutdown input that disables the regulator when pulled below 0.6 V.
The handbook provides absolute maximum ratings, a connection diagram, pin descriptions, detailed electrical characteristics, ordering numbers for various output voltages, typical performance curves, and mechanical dimensions for the SOT‑23‑5L package. Legal and warranty information is included at the end.
| Maximum Output Current | 200 mA |
|---|---|
| Package | SOT‑23‑5L |
The regulator can supply up to 200 mA of output current.
The device is supplied in an SOT‑23‑5L package.