Description

The LK112Sxx 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 30 µVrms. An internal PNP pass transistor is used to achieve a low dropout voltage.

The LK112Sxx has a very low quiescent current in ON MODE while in OFF MODE the Iq is reduced down to 100 nA 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.

Features

■ 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

LK112SM18TR属于集成电路（IC） > 线性 + 开关稳压器。意法半导体（ST）集团制造生产的LK112SM18TR稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。