L4938NPD

® L4938N/ND L4938NPD DUAL MULTIFUNCTION VOLTAGE REGULATOR . . . . . . . . . . . . STANDBYOUTPUT VOLTAGEPRECISION 5V ± 2% OUTPUT 2 TRACKED TO THE STANDBY OUTPUT OUTPUT 2 DISABLE FUNCTION FOR STANDBY MODE VERY LOW QUIESCENT CURRENT, LESS THAN 250µA, IN STANDBY MODE OUTPUT 2 VOLTAGE SETTABLE FROM 5 TO 20V OUTPUT CURRENTS : I01 = 50mA, I02 = 500mA VERY LOW DROPOUT (max 0.4V/0.6V) OPERATING TRANSIENT SUPPLY VOLTAGE UP TO 40V POWER-ON RESET CIRCUIT SENSING THE STANDBY OUTPUT VOLTAGE POWER-ON RESET DELAY PULSE DEFINED BY THE EXTERNAL CAPACITOR EARLY WARNING OUTPUT FOR SUPPLY UNDERVOLTAGE THERMAL SHUTDOWN AND SHORTCIRCUIT PROTECTIONS PowerDIP (12+2+2) SO20 (12+4+4) PowerSO20 ORDERING NUMBERS: L4938N (PDIP) L4938ND (SO) L4938NPD (PSO20) DESCRIPTION The L4938N is a monolithic integrated dual voltage regulatorswith two very low dropout outputsand additional functions such as power-on reset and input voltage sense. They are designedfor supplying microcomputer controlled systems specially in automotive applications. PIN CONNECTION (top view) POWERDIP SO20 PowerSO20 N.C. 1 2 3 4 5 6 7 8 9 10 D93AT004 20 19 18 17 16 15 14 13 12 11 SI VS1 VS2 GND GND GND GND VO2 VO2 ADJ N.C. CT EN GND GND RES SO VO1 1 2 3 4 5 6 7 8 D95AT156 16 15 14 13 12 11 10 9 SI VS1 VS2 GND GND VO2 VO2 ADJ GND N.C. VS2 VS1 SI N.C. CT EN N.C. GND 1 2 3 4 5 6 7 8 9 10 D95AT169A 20 19 18 17 16 15 14 13 12 11 GND N.C. VO2 ADJ VO1 SO RESET N.C. N.C. GND C7 EN GND GND GND GND RES SO VO1 April 1999 1/...