L2949E

UTCL2949E LINEAR INTEGRATED CIRCUIT MULTIFUNCTION VERY LOW DROP VOLTAGE REGULATOR DESCRIPTION The UTC L2949E is a monolithic integrated 5V voltage regulator with a very low dropout output and additonal functions as power-on reset and input voltage sense.It is designed for supplying the microcomputer controlled systems especially in automotive applications. FEATURES *Operating dc supply voltage range 5V to 28V. *Transient supply voltage up to 40V. *Extremely low quiescent current in standby mode. *High precision standby output voltage 5V±1% *Output current capability up to 100mA. *Very low dropout voltage less than 0.5V. *Reset circuit sensing the output voltage *Programmable reset pulse delay with external capacitor *Voltage sense comparator. *Thermal shutdown and short circuit protections. PIN CONNECTIONS DIP-8 SOP-8 SOP-20 VS 1 SI 2 Vz 3 CT 4 8 VOUT 7 SO 6 RES 5 GND DIP-8/SOP-8 Vz CT N.C. GND GND GND GND N.C. N.C. RES 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 SOP-20 SI VS N.C. GND GND GND GND N.C. VOUT SO UTC UNISONIC TECHNOLOGIES CO. LTD 1 QW-R102-014,A UTC L2949E BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT Vz VOUT CT VS PREREGULATOR 5V 2μ + REG SI RESET VS 2V REF 1.23V SENSE 1.23V RES SO GND ABSOLUTE MAXIMUM RATINGS PARAMETER DC Operating Supply Voltage Transient Supply Voltage(T<1s) Output Current Output Voltage Output Voltage Reset Output Sense Output Output Current Reset Output Sense Output Preregulator Output Voltage Preregulator Output ...