L4902A

® L4902A DUAL 5V REGULATOR WITH RESET AND DISABLE . . . . . . . . . . . . . DOUBLE BATTERY OPERATING OUTPUT CURRENTS : I01 = 300 mA I02 = 300 mA FIXED PRECISION OUTPUT VOLTAGE 5V± 2% RESET FUNCTION CONTROLLED BY INPUT VOLTAGE AND OUTPUT 1 VOLTAGE RESET FUNCTION EXTERNALLY PROGRAMMABLE TIMING RESET OUTPUT LEVEL RELATED TO OUTPUT 2 OUTPUT 2 INTERNALLY SWITCHED WITH ACTIVE DISCHARGING OUTPUT 2 DISABLE LOGICAL INPUT LOW LEAKAGE CURRENT, LESS THAN 1µA AT OUTPUT 1 RESET OUTPUT NORMALLY HIGH INPUT OVERVOLTAGE PROTECTION UP TO 60V OUTPUT TRANSISTORS SOA PROTECTION SHORT CIRCUIT AND THERMAL OVERLOAD PROTECTION HEPTAWATT (Vertical) ORDERING NUMBER : L4902A DESCRIPTION The L4902A is a monolithic low drop dual 5V regulator designed mainly for supplying microprocessor systems. Reset and data save functions and remote switch on/off control can be realized. PIN CONNECTION June 2000 1/9 L4902A PIN FUNCTIONS N° 1 2 3 4 5 Name Input 1 Timing Capacitor Disable Input GND Reset Output Regulators Common Input If Reg. 2 is switched-ON the delay capacitor is charged with a 5µA constant current. When Reg. 2 is switched-OFF the delay capacitor is discharged. A high level (> VDT) disable output Reg. 2. Common Ground When pin 2 reaches 5V the reset output is switched high. 5V ) ; tRD (ms) = Ct (nF) Therefore tRD = Ct ( 10µA 5V – 300mA Regulator Output. Enabled if Vo 1 > VRT. DISABLE INPUT < VDT and VIN > VIT. If Reg. 2 is switched-OFF the C02 capacitor is discharged. 5V – 300mA. Low leakage (in ...