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LK112M31TR Fiches technique(PDF) 1 Page - STMicroelectronics |
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1 / 17 page July 2008 Rev 15 1/17 17 LK112xx Low noise low drop voltage regulator with shutdown function Features ■ Output current up to 150 mA ■ Low dropout voltage (350 mV at IOUT = 50 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 ■ 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 LK112xx 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 LK112xx 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 LK112XX14 LK112XX24 LK112XX35 LK112XX45 LK112XX15 LK112XX25 LK112XX37 LK112XX46 LK112XX18 LK112XX26 LK112XX39 LK112XX48 LK112XX19 LK112XX29 LK112XX41 LK112XX49 LK112XX20 LK112XX31 LK112XX42 LK112XX50 LK112XX22 LK112XX33 LK112XX43 LK112XX60 LK112XX23 LK112XX34 LK112XX44 LK112XX80 www.st.com |
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