LK112M21TR集成電路（IC）的線性+開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

LK112M21TR屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由意法半導體集團制造生產(chǎn)的LK112M21TR穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應用。

Description

The LK112 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 connected to the noise bypass pin to reduce the output noise level to 30 μVrms. 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 100 nA 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.

Features

? Output current up to 150 mA

? Low-dropout voltage (350 mV at IOUT = 150 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