TC4949

Multifunction Very Low Dropout Voltage Regulator TC4949 TC4949 Multifunction Very Low Dropout Voltage Regulator FEATURES s s s s s s s s s s Operating DC Supply Voltage Range 5.0V to 28V Transient Supply Voltage up to 40V Extremely Low Quiescent Current in Standby Mode High Precision Standby Output Voltage 5.0V ±1% Output Current Capability up to 100mA Very Low Dropout Voltage less than 0.4V Reset Circuit Sensing the Output Voltage Programmable Reset Pulse Delay with External Capacitor Voltage Sense Comparator Thermal Shutdown and Short Circuit Protections GENERAL DESCRIPTION The TC4949 is a monolithic integrated 5.0V voltage regulator with a very low dropout and additional functions such as power–on reset and input voltage sense. It is designed for supplying the micro–computer controlled systems especially in automotive applications. ORDERING INFORMATION Part Number TC4949VPA TC4949VOA Package 8-Pin PDIP (Narrow) 8-Pin SOIC (Narrow) Temperature Range –40 to +125°C –40 to +125°C REPRESENTATIVE BLOCK DIAGRAM Output Voltage (VOUT) VZ 3 CT 4 8 Preregulator 6.0V 2.0µA + – + – PIN CONFIGURATIONS 8-Pin PDIP VCC 1 Reset 6 Supply Voltage (VCC) 1 8 VOUT SIN 2 VZ 3 CT 4 TC4949 7 SOUT 6 RESET 5 GND Regulator Sense Input (SIN) 2 1.23VREF VS + - 2.0V Sense Output (SOUT) + – Reset 7 8-Pin SOIC VCC 1 SIN 2 VZ 3 8 VOUT 7 SOUT + 1.23V Sense 5 Gnd TC4949 6 RESET 5 GND w w w .d e e h s a t a . u t4 m o c CT 4 TC4949-1 1/6/00 1 TelCom Semiconductor reserves the righ...