LK112M33TR

LK112M33TR is a low noise and low drop voltage regulator with shutdown function. It is a 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 connected to the noise bypass pin to reduce the output noise level to 30µVrms. An internal PNP pass transistor is used to achieve a low-dropout voltage. The LK112 has a very low quiescent current in on mode while in off mode Iq is reduced below 100nA max. The internal thermal shutdown circuitry limits the junction temperature below 150°C. Load current is internally monitored and the device shuts down in the presence of a short-circuit or overcurrent condition on the output.

• Internal current and thermal limit
• Quiescent current is 175µA typ On mode (except ISHDN), 0.1µA max Off mode, VI=8V, VSHDN = 0V
• Dropout voltage is 0.17V typ (IO = 60mA)
• Supply voltage rejection is 55dB typ (VI = VO+1.5V, CBYP = 0.1µF, CO = 10µF, f = 400Hz, IO = 30mA)
• Output noise voltage is 30µVrms typ (B= 10Hz to 80KHz, CBYP = 0.1µF,IO = 60mA)
• Shutdown input current is 12µA typ (VSHDN = 1.8V, output on)
• Output voltage temperature coefficient is 0.09mV/°C typ (IO = 10mA)
• 3.3V output voltage
• Operating junction temperature range from -40 to 125°C
• SOT23-5L package