The LK112Sxx is a low noise low drop voltage regulator with shutdown function. Its features include: output current up to 200 mA; low dropout voltage (500 mV max at IOUT = 200 mA); very low quiescent current: 0.1 µA in OFF mode and max 250 µA in ON mode at IOUT = 0 mA; low output noise: typ. 30 µV at IOUT = 60 mA and 10 Hz < f < 80 kHz; wide range of output voltages; internal current and thermal limit; VOUT tolerance ± 2% (at 25 °C); operative input voltage from VOUT + 0.5 to 14 V (for VOUT > 2 V) or from 2.5 V to 14 V (for VOUT < 2 V).
The LK112Sxx is a low dropout linear regulator with a built-in electronic switch controlled by TTL or CMOS logic levels. It is designed to provide a stable output voltage with very low quiescent current, making it suitable for battery-powered applications. The device includes internal current and thermal limit protection to ensure safe operation under fault conditions.
| Output current | up to 200 mA |
|---|---|
| Dropout voltage | 500 mV max at Iout = 200 mA |
| Quiescent current (OFF mode) | 0.1 µA |
| Quiescent current (ON mode) | max 250 µA |
| Output noise | typ. 30 µVrms |
| Vout tolerance | + 2% |
| Operating input voltage | Vout + 0.5 to 14 V |
| Operating junction temperature | -40 to 125 °C |
| Package type | SOT23-5L |
The maximum output current is up to 200 mA.
The internal switch is controlled by TTL or CMOS logic levels on the SHDN pin.
The maximum dropout voltage is 500 mV when the output current is 200 mA.