SC112

150mA ULTRA LOW DROPOUT MICROPOWER LINEAR REGULATOR PRELIMINARY - July 25, 2000 SC112 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC112 is a 150mA ultra low dropout linear regulator with a built in CMOS/TTL logic level enable, designed specifically for battery powered applications where low quiescent current and low dropout are critical for battery longevity. The SC112 uses a Semtech proprietary internal PNP device for the pass element, providing a low dropout voltage of 130mV at a load of 60mA. The output noise is reduced to 30µV (typical) by placing a very low leakage 10nF capacitor on pin 3 (noise bypass). Each device contains a bandgap reference, error amplifier, PNP pass element, thermal and current limiting circuitry and resistor divider network for setting output voltage. The SC112 is packaged in a six lead SOT-23 surface mount package for a very small footprint and it requires only a 1µF capacitor on the output and a 0.01µF on the bypass pin for a minimum number of external components. FEATURES = = = = = = = = Low dropout voltage CMOS/TTL compatible control switch Very low quiescent current 60µA (ON, no load) Internal thermal shutdown Short circuit protection Very low standby current 0.1µA maximum (OFF) Low noise with external bypass capacitor Industrial temperature range APPLICATIONS = = = = = = Battery powered systems Cellular telephones Cordless telephones Pagers, personal digital assistants Portable instrumentati...