L4947PD013TR

L4947PD ® 5V-0.5A VERY LOW DROP REGULATOR WITH RESET PRECISE OUTPUT VOLTAGE (5V ± 4%) OVER FULL TEMPERATURE RANGE (– 40 / 125 °C) VERY LOW VOLTAGE DROP (0.75Vmax) OVER FULL T RANGE OUTPUT CURRENT UP TO 500mA RESET FUNCTION POWER-ON RESET DELAY PULSE DEFINED BY THE EXTERNAL CAPACITOR + 80V LOAD DUMP PROTECTION – 80V LOAD DUMP PROTECTION REVERSE VOLTAGE PROTECTION SHORT CIRCUIT PROTECTION AND THERMAL SHUT-DOWN (with hysteresis) LOW START UP CURRENT DESCRIPTION The L4947PD is a monolithic integrated circuit in HiPSO package specially designed to provide a stabilized supply voltage for automotive and industrial electronic systems. Thanks to its very low voltage drop, in automotive applications the L4947PD can work correctly even during the cranking phase, when the battery voltage could ) s ( ct BLOCK DIAGRAM PowerSO20 c u d ORDERING NUMBER: L4947PD e t le o s b O - r P e PNP OUTPUT TRANSISTOR t e l o s b O DUMP PROTECT. START o r P fall as low as 6V. Furthermore, it incorporates a complete range of protection circuits against the dangerous overvoltages always present on the battery rail of the car. The reset function makes the device particularly suited to supply microprocessor based systems : a signal is available (after an externally programmable delay) to reset the microprocessor at power-on phase ; at power-off, this signal becomes low inhibiting the microprocessor. u d o INPUT 17 ) s t( OUTPUT 3 ANTI SAT. REF. ERROR AMP. THERMAL PROTECTION OUTPUT CURRENT LIMITER RESET OUTPUT 19 RESET CIRCUIT GROUND This 1-20 is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without 1-20 notice. 2 June 2000 DELAY CAPACITOR D94AT106 1/6 L4947PD ABSOLUTE MAXIMUM RATINGS Symbol Parameter DC Input Voltage DC Reverse Input Voltage Transient Input Overvoltages : Load Dump : 5ms ≤ trise ≤ 10ms τf Fall Time Constant = 100ms RSOURCE ≥ 0.5Ω Field Decay : 5ms ≤ tfall ≤ 10ms, RSOURCE ≥ 10Ω τr Rise Time Constant = 33ms Low Energy Spike : trise = 1µs, tfall = 500µs, RSOURCE ≥ 10Ω fr Repetition Frequency = 5Hz Vi Value Unit 35 – 18 80 V V V – 80 V ± 100 V 35 V – 55 to 150 °C Reset Output Voltage VR TJ, Tstg Junction and Storage Temperature Range Note: The circuit is ESD protected according to MIL-STD-883C. c u d PIN CONNECTION (Top view) GND 1 20 GND DELAY CAP. 2 19 RESET +VOUT 3 18 N.C. N.C. 4 17 +VIN N.C. 5 16 N.C. N.C. 6 15 N.C. 7 14 8 13 9 12 N.C. 10 11 GND N.C. N.C. GND (s) od Rth j-case r P e t e l o s b O b O - N.C. 100nF 100nF 3 Unit 3 °C/W OUT RP L4947PD 2 Value Max 17 Cd N.C. Parameter IN Ci N.C. D94AT107A Thermal Resistance Junction-case TEST CIRCUIT o r P so t c u THERMAL DATA Symbol e t le 19 Co 47µF(*) RESET OUTPUT 1-20 D94AT108 (*) Min 20µF, ESR