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LK112SXX24 Datasheet(PDF) 1 Page - STMicroelectronics |
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LK112SXX24 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 17 page July 2008 Rev 11 1/17 17 LK112Sxx Low noise low drop voltage regulator with shutdown function 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 < 2 V) 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. SOT23-5L Table 1. Device summary Part numbers LK112SXX13 LK112SXX24 LK112SXX36 LK112SXX45 LK112SXX14 LK112SXX26 LK112SXX37 LK112SXX46 LK112SXX18 LK112SXX28 LK112SXX38 LK112SXX47 LK112SXX19 LK112SXX29 LK112SXX39 LK112SXX48 LK112SXX20 LK112SXX31 LK112SXX41 LK112SXX49 LK112SXX21 LK112SXX33 LK112SXX42 LK112SXX50 LK112SXX22 LK112SXX34 LK112SXX43 LK112SXX23 LK112SXX35 LK112SXX44 www.st.com |
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