SC339

Ultra Low Output Voltage Linear FET Controller POWER MANAGEMENT Description The SC339 is an ultra-low output voltage, linear power supply controller designed to simplify power management for notebook PCs. It is part of Semtech’s Smart LDO TM family of products. The SC339 has a user adjustable output that can be set anywhere between 0.5V and 3.3V using two external resistors. SC339 features include tight output voltage regulation (± 1% over 0°C to +85°C), enable control, open drain power good signal, under-voltage protection and soft-start. The www.DataSheet4U.com enable pin allows the part to enter a very low power standby mode. Pulling it high enables the output. The power good pin is an open drain and asserts low when the voltage at the adjust pin is below 88% (typ) of nominal. If the voltage at the adjust pin is below 50% (typ) of nominal, the undervoltage protection circuitry will shut down the output. The SC339 is available in a tiny SOT-23 6-pin surface mount package. SC339 Features ± 1% Voltage Accuracy Over-Temperature Low Shutdown Current Runs Off 5V Supply Ultra-Fast Transient Response Enable Control for the Output Power Good Monitoring and Signaling for the Output Gate Drive from Input Supply Enables Use of N-Channel MOSFET User Selectable Dropout Voltage Under-Voltage Protection for the Output SOT-23 6-pin Surface Mount Package Compatible with Ceramic Capacitors Low Ripple Output Internal 1ms soft-start requires no external components Fully WEEE and RoHS complia...